Percentage Of Nitrogen Research Articles

Effect of spraying iron, zinc and using superabsorbent on grain yield and some biochemical properties of maize under drought stress

Nutrients such as iron and zinc play a vital role in controlling the negative effects of drought stress through the synthesis of enzymes, maintenance of cell membrane, and activation of antioxidant defense system. Due to these biochemical properties, an experiment was conducted to evaluate effect of spraying iron, zinc and using superabsorbent on grain yield and some of biochemical properties of maize under drought stress in a randomized complete block design in Shooshtar city during the years 2017–2018. The experimental treatments included three levels of drought stress (Irrigation after 30%, 40% and 50% evaporation). Sub-plots consisted of superabsorbent polymer at two levels (control and 200 kg/ha) and combination of iron and zinc (control, iron, zinc, and iron-zinc). The results showed that drought stress affected chlorophyll, proline, iron grain concentration, nitrogen percent, grain protein and grain yield. Drought stress caused a significant reduction in yield. The percentage of grain protein was significantly increased in irrigation treatment at 50% of farming capacity. The highest grain yield and chlorophyll index was observed in 30% irrigation treatment. Spraying iron and zinc significantly increased the grain yield, chlorophyll index, iron, and zinc concentrations. Furthermore, drought stress and superabsorbent interacted significantly on grain yield. The interaction among drought stress and superabsorbent elements had significant effects on zinc and iron concentration. The present study suggests that using 200 kg/ha superabsorbent polymer and spraying iron and zinc under the 40% post-discharge irrigation may improve grain yield and biochemical features of maize.

Black soldier fly larvae meal supplementation in a low protein diet reduced performance, but improved nitrogen efficiency and intestinal morphology of duck.

Reduced crude protein (CP) diets offer potential benefits such as optimized feed efficiency, reduced expenses, and lower environmental impact. The objective of this study was to evaluate black soldier fly larvae (BSFL) meal on a low-protein diet for duck performance, blood biochemical, intestinal morphology, gastrointestinal development, and litter. The experiment was conducted for 42 days. A total of 210-day-old male hybrid ducklings (5 replicate pens, 7 ducks per pen) were randomly assigned to 6 dietary treatments (3×2 factorial arrangements) in randomized design. The factors were CP level (18%, 16%, 14%) and protein source feed soybean meals (SBM), black soldier fly larvae meals (BSFLM). Reduced dietary CP levels significantly decreased growth performance, feed intake, the percentage of nitrogen, pH (p<0.05), and tended to suppress ammonia in litter (p = 0.088); increased lipid concentration; and enhanced relative weight of gastrointestinal tracts (p<0.05). In addition, dietary BSFL as a source of protein feed significantly increased lipid concentration and impacted lowering villus height and crypt depth on jejunum (p<0.05). In conclusion, the use of BSFLM in a low-protein diet was found to have a detrimental effect on growth performance. However, the reduction of 2% CP levels in SBM did not have a significant impact on growth performance but decreased nitrogen and ammonia concentrations.

The Effect of Adding Whey and Spraying with Silicone on the Chemical of Chinese Cabbage Plant Brassica campestris var. Pekinensis

The experiment was conducted in the fields of horticulture and Garden Engineering at the College of Agriculture - University of Kerbala for the agricultural season 2022-2023 with the aim of knowing the effect of spraying with silicon in the form of potassium silicate (K2Sio3) and adding the by-product (whey) in improving the growth indicators of the Chinese Cabbage plant. The experiment included 16 treatments that included four concentrations of silicon (0.1.2.3) ml L-1 and four concentrations of whey by-product (0.8.16.24) L ha-1 and were in three batches between one batch and another 10 days. It was carried out as a factorial experiment with two factors according to the randomized block design and with three replications, and the least significant difference test (l.s.d) was used to compare the means at the probability level of 0.05. Silicon spraying treatment led to a significant increase in all yield traits, as the concentration of 3 ml L-1 was significantly superior in each of Nitrogen percentage, phosphorus percentage, potassium percentage and ascorbic acid. As for the treatment of whey addition, the concentration of 24 liters ha-1 was significantly higher in Nitrogen percentage, phosphorus percentage, potassium percentage and ascorbic acid. 2.547 ‘0.316‘ 1.403‘ 64.61 respectively. The bilateral interaction between the two experimental factors showed significant superiority in all the traits under experiment.

Petrographic and geochemical analysis of Barmer Basin Paleogene lignite deposits: Insights into depositional environment and paleo-climate

The current study attempts to characterize the samples from Kapurdi, Giral and Sonari lignite mines of Barmer Basin within Rajasthan Tertiary Lignite deposits using petrographic and geochemical techniques. The data generated has been studied in order to better understand the geochemical properties, hydrocarbon potential, depositional environment and paleo-climatic condition of the paleo-mires of these lignites. The proximate analysis of the samples reveals that the average ash content of the Barmer Basin is 11.93 %, the average moisture content is 14.08 %, average volatile matter yield is 42.03 % and the average fixed carbon is 31.95 %, which suggesting that the physical properties of lignite are dominated by volatile matter on dry basis. The ultimate investigation reveals the chemical properties of the lignite with the average carbon content found to be 58.79 wt%, hydrogen value 3.83 wt%, nitrogen percentage 1.60 wt% and sulphur content 2.75 wt%. This clearly indicates high sulphur concentration in Barmer lignite deposits, based on dry basis. The lignite samples subjected to FTIR studies identified aliphatic CH group, aromatic CO group, hydroxyl OH and Aldehyde HCO group. The Rock-Eval pyrolysis studies have been carried out to know the coalification profile of the deposits and hydrocarbon source rock potential. The varying behaviour between brown coal lithotype are primarily reflected by changes in oxygen index values, whereas hydrogen index values demonstrate a more pronounced correlation with coal type rather than the level of maturation. The results show the average total organic carbon (TOC) 47.29 %, S1 peak 2.18 mg HC/g, S2 peak 88.70 mg HC/g, S3 peak 19.22 % mg CO2/g, Tmax 410.53 °C, hydrogen index 219.2 mg HC/g TOC and oxygen index 46.33 mg CO2/g TOC. According to petrographic investigations, the huminite macerals dominate followed by liptinite and inertinite maceral groups in mineral matter-free basis. In all the three different lignite mines, the huminite group dominates with preserved sub-maceral ulminite indicating less transformation of structured plant matter. Reconstruction of depositional environment and paleo-climatic condition of the paleo-mires has been attempted by using organic petrographic indices. The high gelification index (GI) and low tissue preservation index (TPI) values suggest a prolonged wet environment during the decomposition of organic material, accompanied by a gradual subsidence process. The ground water influence index (GWI) and vegetation index (VI) denote ombrotrophic to mesotrophic hydrological conditions of basin at the time of deposition.

Fungal Community Succession of Populus grandidentata (Bigtooth Aspen) during Wood Decomposition

Fungal communities are primary decomposers of detritus, including coarse woody debris (CWD). We investigated the succession of fungal decomposer communities in CWD through different stages of decay in the wide-ranging and early successional tree species Populus grandidentata (bigtooth aspen). We compared shifts in fungal communities over time with concurrent changes in substrate chemistry and in bacterial community composition, the latter deriving from an earlier study of the same system. We found that fungal communities were highly dynamic during the stages of CWD decay, rapidly colonizing standing dead trees and gradually changing in composition until the late stages of decomposed wood were integrated into soil organic matter. Fungal communities were most similar to neighboring stages of decay, with fungal diversity, abundance, and enzyme activity positively related to percent nitrogen, irrespective of decay class. In contrast to other studies, we found that species diversity remained unchanged across decay classes. Differences in enzyme profiles across CWD decay stages mirrored changes in carbon recalcitrance, as B-D-xylosidase, peroxidase, and Leucyl aminopeptidase activity increased as decomposition progressed. Finally, fungal and bacterial gene abundances were stable and increased, respectively, with the extent of CWD decay, suggesting that fungal-driven decomposition was associated with shifting community composition and associated enzyme functions rather than fungal quantities.

The role of adding potassium humate and foliar spraying with marine algae on the mineral content and nutritional value of Moringa

An experiment was carried out in the plastic house at the Agricultural Research Station in Bani Maqam, affiliated to Jam Jamal Agriculture Directorate in Sulaymaniyah Governorate, in a randomized complete block design, with three replications, on June 10, 2021. Furthermore, 4, 8, 12 and 16 kg hectares when planting and before the first irrigation and after each mowing process, and the second factor was spraying with seaweed extract Alga000 at three levels 0, 1, and 2 ml (2 and 4 ml per liter of total spray) and at two intervals after 20 and 30 days of planting After 10 and 25 days of mowing, at a height of 20 cm from the surface of the ground, the mineral content of leaves and dry stems samples of the first mowing plants was estimated. It included the content of calcium, iron and manganese (mg/100g dry matter) and the percentage of nitrogen, phosphorous and potassium. Indicators of the nutritional value of the leaves and stems of the first mow, which included the estimation of the percentage of total carbohydrates, ash, protein and fiber. The results showed that adding 16 kg hectares of potassium humate and spraying at a concentration of 2 ml per liter twice with algae extract Bahriya recorded the highest content of iron (42.3 and 19.82), calcium (2103.7 and 1009.29) and manganese (40 and 10.15) mg/100 g of dry matter for leaves and stems. The highest percentage of phosphorous was 0.333% in dry leaves, and the highest percentage of nitrogen (3.89%) and 1.58%), potassium (1.601% and 1.24%), protein (24.314% and 9.885%), total carbohydrates (35.23% and 11.86%), and the lowest fiber content (4.57% and 25.45%) in the dry matter. For leaves and stems . Keywords: moringa, potassium humate, marine algae, mineral content, nutritional value

Effect of Adding Levels of Palm Fronds Compost and Mineral Fertilizer on Fertile Soil Characteristics, Quality, and Productivity of Maize Yield (Zea Mays L.)

An experiment was carried out in one of the fields of the Soil Research Department - Agricultural Research Department/Ministry of Agriculture in the Abu Ghraib district at latitude 33° 17" 31 N and longitude 44° 03" 56 E and 35 m above sea level. This field study was conducted in the autumn season 2021-2022 for the cultivation of yellow maize ( Maha cultivar) in sedimentary soil with silty clay loam texture, with a Split Plot Design. The treatments were distributed using the RCBD for three replicates with two factors. The first factor represents the main plots that include the addition of mineral fertilizer 120, 80, and 320 kg.ha-1 for each of (N, P, and K), respectively, at three levels (0, 50, and 100%) of the fertilizer recommendation. On the other hand, the second factor was a subplot of organic fertilizer (palm frond compost) at three levels (0, 5, and 10) μg.ha-1 . Soil samples were taken to estimate the availability of nitrogen, phosphorous, and potassium, where the total yield and percentage of protein for yellow maize were estimated. The results showed that adding organic fertilizers (palm fronds) with the levels of mineral fertilizers increased the availability of nutrients and the yield of maize. Accordingly, the treatment O2M2 achieved the highest values of nutrient availability, quantity, and quality of yield, reaching (59.167, 33.407, and 257.967) mg.kg-1 soil and (10,096) μg.ha-1 and (9.435%) for each of nitrogen, phosphorous, potassium, yield, and protein percentage, respectively. Moreover, there were no significant differences between the treatments of O1M2 and O2M1 in the amount of yield and the percentage of protein, which gave the values of 8.403 and 8.134 μg.ha-1, respectively, and the protein percentage of 8.630 and 8.915% respectively. It can be concluded that organic fertilizers can be added to compensate for mineral fertilizers, reduce environmental pollution, and reduce the economic cost and soil preservation because organic fertilizers are considered safe and environmentally friendly. Keywords: yellow maize, mineral fertilizer, palm fronds compost.

Enhancing Metabolism and Milk Production Performance in Periparturient Dairy Cattle through Rumen-Protected Methionine and Choline Supplementation.

For dairy cattle to perform well throughout and following lactations, precise dietary control during the periparturient phase is crucial. The primary issues experienced by periparturient dairy cows include issues like decreased dry matter intake (DMI), a negative energy balance, higher levels of non-esterified fatty acids (NEFA), and the ensuing inferior milk output. Dairy cattle have always been fed a diet high in crude protein (CP) to produce the most milk possible. Despite the vital function that dairy cows play in the conversion of dietary CP into milk, a sizeable percentage of nitrogen is inevitably expelled, which raises serious environmental concerns. To reduce nitrogen emissions and their production, lactating dairy cows must receive less CP supplementation. Supplementing dairy cattle with rumen-protected methionine (RPM) and choline (RPC) has proven to be a successful method for improving their ability to use nitrogen, regulate their metabolism, and produce milk. The detrimental effects of low dietary protein consumption on the milk yield, protein yield, and dry matter intake may be mitigated by these nutritional treatments. In metabolic activities like the synthesis of sulfur-containing amino acids and methylation reactions, RPM and RPC are crucial players. Methionine, a limiting amino acid, affects the production of milk protein and the success of lactation in general. According to the existing data in the literature, methionine supplementation has a favorable impact on the pathways that produce milk. Similarly, choline is essential for DNA methylation, cell membrane stability, and lipid metabolism. Furthermore, RPC supplementation during the transition phase improves dry matter intake, postpartum milk yield, and fat-corrected milk (FCM) production. This review provides comprehensive insights into the roles of RPM and RPC in optimizing nitrogen utilization, metabolism, and enhancing milk production performance in periparturient dairy cattle, offering valuable strategies for sustainable dairy farming practices.

The Natural Alternatives: The Impact of Plant Extracts on Snowbush (Breynia disticha Forst.) Cuttings’ Morpho-Physiological and Biochemical Characteristics

The utilization of cuttings remains a prevalent method for vegetative propagation in various plant species. Synthetic rooting hormones have conventionally been employed to enhance the rooting process; however, their high cost and potential environmental risks have necessitated the exploration of natural alternative compounds. In this study, the efficacy of natural plant extracts (pure honey, aloe extract, willow extract, moringa extract, and cinnamon powder) and synthetic auxin derivatives (indole-3-butyric acid and α-naphthaleneacetic acid) at a concentration of 2000 ppm was compared for their influence on rooting and vegetative growth of snowbush (Breynia disticha) cuttings, a significant ornamental and medicinal shrub. Results demonstrated that while the synthetic hormones produced the highest survival percentages and root number, the roots were consistently short, thick, friable, and largely void of secondary roots. Conversely, the alternative natural plant extracts, particularly aloe extract, exhibited promising outcomes, showcasing good rooting percentage and root number, significantly increased root length, and fresh and dry root weight. Furthermore, aloe extract demonstrated the potential to enhance shoot length and alter the chemical constituents of the cuttings. The highest values of total phenols and nitrogen percentage were recorded with cuttings treated with indole-3-butyric acid, followed by cuttings treated with aloe extract. While using aloe extract, we recorded the highest values of total carbohydrates, phosphorus, and potassium percentages. Notably, the highest endogenous levels of indole acetic acid and gibberellic acid, along with the lowest abscisic acid concentration in cutting tissues, were associated with the highest rooting percentage observed with indole-3-butyric acid, followed by the use of aloe extract. We hypothesized that natural plant extracts, specifically aloe extract, have potential as a viable alternative for synthetic auxins in promoting successful rooting and vegetative growth in snowbush cuttings. Further research is warranted to explore the underlying mechanisms and optimize the application of these natural compounds in vegetative propagation techniques.

Effect of transglutaminase on taste characteristics of pea protein hydrolysates through altering the composition of amino acids and peptides

This study investigated the effects of transglutaminase (TGase) treatment on the taste profiles and peptide compositions of pea protein isolate hydrolysates (PPIH) produced by Flavourzyme and protease 11,039. TGase significantly increased umami intensity by 50% and dramatically decreased bitterness by 40% in PPIH. While protein recovery, degree of hydrolysis, and peptide nitrogen percentage remained unaffected, TGase altered the relative proportions of taste compounds. This was evident through increased levels of umami, hydrophilic, and sweet-bitter amino acids in non-free amino acids, indicating the formation of peptides with umami potential. UPLC-MS/MS analysis confirmed that TGase facilitated the generation of longer peptides with higher umami potential compared to the short peptides in untreated PPIH. Simultaneously, the reduction in bitter components and the generation of umami substances contributed to the decrease in bitterness. Receptor-peptide docking studies confirmed that the newly formed peptides had higher binding affinities. Overall, TGase modification led to a shift in the substance profiles of PPIH, resulting in the creation of peptides with enhanced umami characteristics. These findings demonstrate the potential of combining TGase treatment with enzymatic hydrolysis to modify taste properties and develop flavorful plant-based protein ingredients.

A Comparison of the Reactivity of the Lattice Nitrogen in Tungsten Substituted Co3 Mo3 N and Ni2 Mo3 N.

The effect of the partial substitution of Mo with W in Co3 Mo3 N and Ni2 Mo3 N on ammonia synthesis activity and lattice nitrogen reactivity has been investigated. This is of interest as the coordination environment of lattice N is changed by this process. When tungsten was introduced into the metal nitrides by substitution of Mo atoms, the catalytic performance was observed to have decreased. As expected, Co3 Mo3 N was reduced to Co6 Mo6 N under a 3 : 1 ratio of H2 /Ar. Co3 Mo2.6 W0.4 N was also shown to lose a large percentage of lattice nitrogen under these conditions. The bulk lattice nitrogen in Ni2 Mo3 N and Ni2 Mo2.8 W0.2 N was unreactive, demonstrating that substitution with tungsten does not have a significant effect on lattice N reactivity. Computational calculations reveal that the vacancy formation energy for Ni2 Mo3 N is more endothermic than Co3 Mo3 N. Furthermore, calculations suggest that the inclusion of W does not have a substantial impact on the surface N vacancy formation energy or the N2 adsorption and activation at the vacancy site.

Development of machine learning models for estimating wheat biophysical variables using satellite-based vegetation indices

Monitoring wheat biophysical variables during the growing season is essential for achieving precision agriculture's important goals. This study estimated plant height, leaf development stage, leaf area index, dry matter, and plant nitrogen content in wheat from Landsat-7 images in North Iran using machine learning algorithms. Forty points were selected from ten wheat fields (270 ha), and the agronomic parameters were recorded during the 2011–2012 growing season. The machine learning models applied in this study were Artificial Neural Network (ANN), Support Vector Machine (SVM), and Deep Neural Network (DNN). Results suggest that the DNN model was the best for predicting all the parameters, except for the nitrogen percentage, in which SVM and DNN have the same accuracy. The DNN model R2 was 0.82, 0.95, 0.95, and 0.90 RMSE (Root Mean Square Error) 9.61, 0.46, 0.47 and 1.2 and MAE (Mean Absolute Error) 26.4, 0.34, 0.28, and 0.84 for estimating plant height, leaf area index, leaf development stage and dry matter biomass, respectively. The DNN and SVM algorithms can effectively predict plant nitrogen percentage with identical R2, RMSE, and MAE values of 0.83–0.84, 0.44–0.46, and 0.33–0.36, respectively. These results show that machine learning models have great potential to provide timely and accurate data for better wheat management under field conditions from satellite imagery.

Source‐sink patterns on coffee trees related to annual climate variability: An approach through stable isotopes analysis

AbstractStable isotopic determination constitutes a useful tool to identify the processes that control the dynamics of the carbon and nitrogen flow in plants, unravelling the mechanisms of their differential investment under different environments. This work aimed to evaluate the spatiotemporal variation of source‐sink patterns of coffee trees under field conditions in response to climatic conditions through the assessment of stable isotopes. For this purpose, stems, leaves, and fruit samples from coffee trees were collected following a temporal pattern based on the region's climatic characteristics and the plant's phenology and a spatial pattern considering different parts of the canopy. The carbon and nitrogen percentage content, the C/N ratio, and the carbon and nitrogen isotopic compositions (δ13C and δ15N) were determined for all samples. The basal portion of the orthotropic branch was also considered for the isotopic analysis of the tree's growth rings. The results obtained were correlated with the climatic variables of the region through a Pearson correlation analysis (p &lt; .05). Coffee plants showed traditional δ13C values of C3 plants. Temporal δ13C variation was associated with the different growth rates between phenological stages and the use of substrates produced at different times under different environmental conditions leading to differences in photosynthetic discrimination. Spatial δ13C variation was observed with heterotrophic tissues isotopically heavier than leaves, with a significant decrease trend in δ13C values from the top (upper third) to the bottom (lower third), associated with ecophysiological differences between the canopy, isotopic fractionation processes downstream of photosynthetic carbon discrimination, and the fixation of C from other pools. Temporal δ15N variation was associated with the precipitation rates in the region and the fertilization distribution across the tree, while the spatial variation was with the plant's nitrogen assimilation and translocation patterns. The tree growth rings isotopic analyses showed isotopic differences between growth rings of the same plant addressed by the climatic conditions, with precipitation being the primary climatic determinant influencing the fixation and discrimination against 13C. Our results highlight the importance of using stable isotope analysis as a reference point for coffee ecophysiological studies to characterize how the temporal and spatial patterns of δ13C and δ15N emerge and signal the influence of climate on the source‐sink relationship of coffee trees under field conditions.

Effect of seedling age and NPK fertilizer on qualitative of Kohlrabi (Brassica oleracea var.gongylodes) grown under drip irrigation system

Field experiment was conducted on Kohlrabi (Brassica oleracea var. gongylodes) ‘White Vienna cv.’ at the Experimental Station of the Department of Horticulture and Landscape, College of Agriculture, Tikrit University, Salah al-Din, Iraq, during the winter season of 2021-2022 under drip irrigation system. This study aimed to investigate the effect of seedling age (45, 60 and 75 days) and different combination of NPK (60:40:0, 70:50:20, 80:60:30, 90:70:40, 100:80:50 and 120:90:50 kg ha-1) on qualitative of kohlrabi plants. The experiment was carried ou according to Randomized Complete Block Design (RCBD) with three replications. The comparison of means was performed by Duncan at a P≤ 0.05 probability level. Results showed that seedling age 45 days increased significantly in the percentages of nitrogen in the leaves, phosphorus and potassium, total dissolved solids (TSS) in knob, content of vitamin C in knob and carbohydrates in the knob which were 3.045%, 0.425%, 3.868%, 6.333%, 0.389 mg ml-1 and 6.204% respectively. On the other hand, using combination fertilizer of NPK at level 120:90:50 kg ha-1, gave significant increment in all studied characteristics. Interaction treatment between seedling age 45 days and combination fertilizer of NPK at 120:90:50 kg ha-1 recorded highest values in all studied characteristics of qualitative for kohlrabi plant except the percentage of nitrogen in leaves. Whereas, seedling age 60 days and combination fertilizer of NPK at 120:90:50 kg ha-1 showed significant superiority in the percentage of nitrogen in leaves 5.533%.

Effect of different levels of pruning and nitrogen fertilizer on vegetative traits and chemical content of Rosmarinus officinalis L.

The experiment was performed in a greenhouse belonging to the Department of Horticulture and Landscaping gardening, College of Agriculture, Tikrit University for the period from November 2021 - May 2022. The experiment included two factors: the level of pruning (without pruning, moderate pruning, and severe pruning); the addition of nitrogen fertilizer at two levels (73.4 and 146.7 g N.L-1 in the form of urea (46% N) according to the randomized complete block design (RCBD), with three replicates and three plants for each experimental unit. The results showed that the treatment of severe pruning (H2) and moderate pruning (H1) were significantly superior in the trait of the branches number (26.65 and 24.61 plants.branches-1), respectively. The treatment without pruning (H0)) was significantly superior in the leaves content of chlorophyll of (0.36 mg.g-1). The nitrogen fertilization treatment of the first concentration (F1) had a significant effect on the trait of plant height, which amounted to 37.28 cm. As for the nitrogen fertilization treatment of the second concentration (F2), it was significantly superior in the percentage of nitrogen 1.31%, phosphorous 0.24%, and potassium 1.43%. As for the interaction, the treatment (S1H0) was significantly superior in the leaves content of chlorophyll, and the treatments (H0F1) and (H0F2) also gave a significant superiority in the leaves content of chlorophyll. The interference treatment (H2F2) also led to a significant superiority in the leaves content of phosphorous. As for potassium

Application of Mahogany Leaves and Sawdust Biochar for Amendment of Saline Soil

This research was conducted for the observation of the status of soil fertility and salinity using the biochar produced from the Mehagony leaves and Sawdust. Biochar has been produced by the pyrolysis method. Different feeds produced biochar ranging from 37% to 39% in initial dry weight. Each biochar was distinguished in the study by the percent of organic Carbon, moisture content, total Nitrogen, and cations of Ca++, Na+, K+, Mg++ Pand S. All of the biochar produced from different feedstock contain high amounts of organic Carbon of 69% to76.11%. The pH, EC, and other nutrient contents were determined from the treated soil before and after the treatment of biochar and found higher value pH values and reduction of EC value due to the application of biochar. The EC values were decreased in biochar-treated saline soil than in untreated soil. The maximum decrease of EC was noticed from 13 to 10.5 ds/m in Mahogany leaf biochar-treated soil. The performance of the biochar of Mahogany leaves is higher than the Sawdust biochar for the reduction of salinity and increased other nutrients such as Potassium (K), Calcium (Ca), Magnesium (Mg), Phosphorus (P), and Sulfur (S). The overall concentration of P, K, Ca, Mg, and S was increased in all biochar-treated saline soil compared to untreated soil. The findings of the study indicated that the Mahogany leaf biochar and Sawdust biochar have a high potential for desalination of saline soil and buildup of available nutrients in saline soil.

Enhancing performance, reducing emissions, and optimizing combustion in compression ignition engines through hydrogen, nitrogen, and EGR addition: An experimental study

Traditional hydrocarbon-based fuels are known for their emissions of partially burned hydrocarbons, nitrogen oxides, and carbon monoxide. The demand for alternative fuels to replace petroleum-based fossil fuels has been steadily increasing over the past decade due to concerns over air pollution, environmental issues, petroleum production uncertainties, and reducing dependence on petroleum products. In this study, hydrogen, EGR (Exhaust Gas Recirculation), and nitrogen were introduced into COME20 (Corn oil methyl ester) fuel. The addition of nitrogen with 26.64% hydrogen and 20% EGR resulted in a decrease in Brake Thermal Efficiency (BTE) and reduced levels of NOx emissions. Various concentrations of nitrogen (6.66%, 9.99%, and 13.32%) were investigated with 26.64% hydrogen and 20% EGR, and the performance, emission, and combustion parameters were evaluated and compared to COME20 and neat diesel. Notably, when nitrogen was absent (0%) and hydrogen and EGR were present at 26.64% and 20% respectively, an increase in BTE was observed compared to the combinations with nitrogen. The addition of nitrogen led to higher levels of CO and HC emissions compared to COME20 and neat diesel at all loads. However, the addition of any percentage of nitrogen with 26.64% hydrogen and 20% EGR resulted in reduced NOx emissions. Additionally, the study revealed a decline in heat release rate and cylinder pressure with the introduction of nitrogen and EGR alongside hydrogen, in contrast to COME20 and diesel. Finally, increasing quantities of nitrogen led to an increase in the ignition delay period.

CO2 Adsorption on Biomass-Derived Carbons from Albizia procera Leaves: Effects of Synthesis Strategies.

CO2 capture is a useful strategy for controlling the risks associated with global warming. The design of an adsorbent is essential for clean and potentially energy-efficient adsorption-based carbon capture processes. This study reports a facile and moderately temperature single-stage combined pyrolysis and activation strategy for the synthesis of nitrogen-doped carbons for high-performance CO2 capture. Using nitrogen-rich Albizia procera leaves as the precursor and carrying out single-stage pyrolysis and activation at temperatures of 500, 600, and 700 °C in the presence NaHCO3 as an activating agent, carbons with different surface characteristics and ultrahigh weight percentage (22-25%) of nitrogen were obtained. The subtle differences in surface characteristics and nitrogen content had a bearing on the CO2 adsorption performance of the resultant adsorbents. Outstanding results were achieved, with a CO2 adsorption capacity of up to 2.5 mmol/g and a CO2 over N2 selectivities reaching 54. The isotherm results were utilized to determine the performance indicators for a practical vacuum swing adsorption process. This study provides a practical strategy for the efficient synthesis of nitrogen-doped carbons for various adsorption applications.

Effect of drying methods and soaking of Ascorbic acid on the chemical content and specific qualities of oil in lemongrass leaves Cymbopogon citratus L.

Lemongrass (Cymbopogon citratus) is an herb that belongs to the genus Cymbopogon of aromatic grasses and contains volatile oil with a fine lemon flavor. There needs to be more information on how drying affects the chemical content and specific qualities promoting the properties of the leaves. Hence, this study sought to investigate the effect of different drying methods and soaking with ascorbic acid on the chemical content and specific qualities of oil in the leaves of the lemongrass plant. An experiment was applied according to the CRD design. The experiment included two factors. The first factor was soaking with ascorbic acid at a (0.5) g / L concentration for 15 minutes. In addition to a non-soaking treatment and the second factor, the drying methods (solar drying, shadow drying, electric oven drying at a temperature of 40 °C for 8 hours) and the comparison by soft weight. The following characteristics were measured (percentage of nitrogen, phosphorus, potassium, volatile oil, oil density and oil refractive index), and the results were statistically analyzed using the SAS statistical analysis program. The mean of the coefficients was compared according to the Duncan polynomial test. The results showed significantly superior drying in the oven over other treatments, as well as superior soaking of ascorbic over non-soaking treatment and gave the interference (drying in the oven + soaking with ascorbic) the highest averages of the studied traits amounted to (2.3806)% for nitrogen and (2.691)% for potassium and (1.092)% for volatile oil and (0.879) mg/microliter of volatile oil density. The differences between these drying methods selection were significant variations in the oil content of lemongrass leaves and election in obtaining high-quality products. Essential oil compositions have also been observed to depend on the drying conditions. However, the order of preference of the drying methods that ensure adequate retention of chemical content and volatile oil of the leaves, as observed in this study, is oven drying &gt; shadow drying &gt; sun drying &gt;, in the order of decreasing magnitude. Keywords: lemongrass, drying methods, ascorbic, chemical composition.

Internal nutrients dominate load and drive hypoxia in a eutrophic estuary.

The hypothesis that local hypoxia and chlorophyll concentration are spatially tethered to local, sediment-driven nutrient release was examined in a small, nutrient-impacted estuary in the Southern Gulf of St. Lawrence, Canada. Sediment reactor core samples were taken at 10 locations between 0.25 and 100% of the estuary area in spring and fall (2019) and used to estimate nitrogen and phosphate flux. Sediment organic matter, carbonate, percent nitrogen, percent carbon, δ13C, and δ15N were measured from the reactor core stations. Oxygen was recorded continually using oxygen loggers while chlorophyll and salinity were measured bi-weekly. A hydrodynamic model was used to determine water renewal time at each station. The most severe eutrophication effects were in the upper one-fifth of the estuary. There were strong local relationships between sediment biogeochemistry, hypoxia, and chlorophyll metrics but not with water renewal time. Internal nutrient loading represented 65% and 69% of total N loading, and 98% and 89% of total P loading to the estuary in June and September, respectively. Sediment nitrogen flux was highly predictable from a range of local sediment variables that reflect either nutrient content, or organic carbon enrichment in general. Percent nitrogen and percent carbon were highly correlated but sediment P flux was poorly predicted from sediment parameters examined. The highest correlations were with percent nitrogen and percent carbon. These results indicate that incorporating internal nutrient loading into nutrient monitoring programs is a critical next step to improve predictive capacity for eutrophication endpoints and to mitigate nutrient effects.