Organic Combination Research Articles

EFFECT OF BIO-ORGANIC AND MINERAL FERTILIZATION, ON THE GROWTH AND YIELD OF CAULIFLOWER (Brassica oleraceae Var.botrytis)

A field experiment was carried out to study the effect of three factors, the first was biofertilization with four types (without addition, combination of A.brasilense + A. chroococcum combination of G.mosseae + T. harzianum, and combination of the two previous combinations), The second factor four types of organic fertilizer(without adding,vermicompost ,Orgevit, a combination of the two previous organic fertilizers),and the third factor mineral fertilizer with two levels (0% and 50%) of the fertilizer recommendation in addition to the full fertilizer recommendation treatment (second comparison).RCBD was used with three replications. The results showed that the triple interaction of the biofertilization treatments added with the organic fertilizer combination of organic fertilizer with 50% of the mineral fertilizer recommendation showed the highest averages for the characteristics of growth and the total yield, which gave79.740 Mg ha-1, and the content of leaves and the curd from N, P and K after harvest and the content of the soil of N, P and K after harvesting, which amounted to 70.81, 38.19, 370.44 mg kg soil-1,in comparison with the no addition treatment which gave the lowest averages .

Impacto de la fertilización con biocarbón y SiO2 en el desarrollo del banano

El banano necesita muchos nutrientes, lo que lleva a los agricultores a depender de fertilizantes químicos que dañan el suelo. Una solución es combinar abonos orgánicos con fertilizantes químicos en menor cantidad. En este marco, el objetivo fue medir el desarrollo de un cultivar de banano en varios tratamientos de biocarbón más dosis fija de SiO2, KNO3 y P2O5. El biocarbón (BC) se obtuvo del raquis del banano a una temperatura de 350 °C por 2 horas. En el ensayo se evaluaron 10 plantas por tratamiento que se conformaron por dosis por planta de: 100 g de BC + 100 g SiO2, 20 g de BC + 100 g SiO2 y 100 g SiO2 (parcela testigo). Estas dosis se aplicaron en la semana uno, ocho y 14 del ensayo. La dosis de fertilizantes para todos los tratamientos se conformó de 75 kg ha-1 KNO3 + 50 kg ha-1 P2O5, y que se aplicaron 15 días antes que la dosis de biocarbon y en la semana seis del ensayo. El estudio demostró que el tratamiento con 20 g de biocarbón fue el más efectivo en términos de altura de la planta y circunferencia del pseudotallo, superando al tratamiento con 100 g y al control. Asimismo, el tratamiento con 100 g de biocarbón mostró el mayor peso de racimo en comparación con los otros tratamientos. Los tratamientos con biocarbón, silicio y fertilizantes tuvieron un efecto en las plantas de banano superior a la fertilización química, lo que sugiere su potencial aplicación en la agricultura.

Effects of Balancing Exchangeable Cations Ca, Mg, and K on the Growth of Tomato Seedlings (Solanum lycopersicum L.) Based on Increased Soil Cation Exchange Capacity

(1) Background: Previous research has demonstrated that the cation exchange capacity (CEC) of soil and the balance of exchangeable cations Ca, Mg, and K are key factors affecting plant growth and development. We hypothesized that balancing exchangeable cations based on increased CEC would improve plant growth and development. (2) Methods: This study conducted a two-phase experiment to evaluate methods for increasing soil CEC and the effects of increasing CEC and balancing Ca, Mg, and K on plant growth. Therefore, we first conducted a soil culture experiment using organic fertilizer, montmorillonite, and humic acid to investigate fertilizers that can effectively increase CEC in the short term. Then, a tomato seedling pot experiment was conducted using the control (CK) and OMHA fertilizer-treated soils collected from soil culture experiments. The CK and OMHA treatment soils were constructed with balanced exchangeable cations and an unbalanced control, respectively. (3) Results: The soil culture experiments revealed that the combination of organic fertilizer, montmorillonite, and humic acid (OMHA treatment) had the most significant effect on increasing CEC. The CEC of the OMHA treatment increased by 41.07%, reaching 27.10 cmol·kg−1. The tomato pot experiments demonstrated that balancing the exchangeable cations in OMHA soil improved the Mg and K nutrition of tomato seedlings and significantly increased SPAD, leaf nitrogen content, and dry weight, while balancing the exchangeable cations in CK soil improved only the K nutrition of tomato seedlings. (4) Conclusions: Overall, balancing exchangeable cations based on increasing CEC can improve soil nutrient availability and alleviate the competition effects of Ca, Mg, and K cations. Low CEC and imbalanced exchangeable cations can be detrimental to tomato seedling growth.

Effects of biofertilizer on the production of bell pepper (Capsicum annuum L.) in greenhouse

Biological fertilizers are useful sources of plant nutrients that enhance crop growth and quality, produce plant hormones, and contribute to sustainable crop production by maintaining soil fertility. The effect of arbuscular mycorrhizal fungi (AMF) and plant growth promoting rhizobacteria (PGPRs) applications in greenhouses on bell pepper (Capsicum annuum L. Nervin) has been studied by conducting a split plot experiment in three replications using a randomized complete block design. The biofertilizers included AMF inoculations (Rhizophagus irregularis + Funneliformis mosseae), and three different bacterial inoculations (Azotobacter chroococcum + Azospirillum lipoferum; Enterobacter cloacae + Pseudomonas putida; Bacillus subtilis + Bacillus amyloliquefaciens) and non-inoculation as a control with two levels of organic fertilizers (with and without).The organic treatment fertilizer, in combination with the inoculation of E. cloacae + P. putida or A. chroococcum + A. lipoferum, as well as AMF, significantly increased the microbial population within the rhizosphere compared to the control. In all treatments, fruit yield increased, with the highest value (15.94 kg m−2) recorded in the AMF treatment, indicating an increase of 18% over the control. All inoculations significantly increased total phenol and ascorbic acid levels in fruit when organic fertilizer was applied. The most significant N uptake was observed in A. crococcum + A. lipoform inoculation, while the most significant Fe uptake was observed in AMF. It was found that all inoculations significantly increased P, K, and Zn uptake. In conclusion, A combination of organic fertilizer and mycorrhizal or (Azotobacter chroococcum + Azospirillum lipoferum) inoculations increased the productivity and quality of bell peppers grown in greenhouses.

Effects of Soluble Organic Fertilizer Combined with Inorganic Fertilizer on Greenhouse Tomatoes with Different Irrigation Techniques

A reasonable fertilization rate and appropriate irrigation technology can lead to the green development of greenhouse tomatoes. The purpose of this study was to explore suitable irrigation technology for greenhouse tomatoes and the appropriate application rate of the soluble organic fertilizer and inorganic fertilizer combination. In 2021 and 2022, the effects of different irrigation techniques and fertilization treatments on tomato plant growth, fruit quality, yield, and efficiency were studied. The irrigation techniques in this study were drip and Moistube irrigation, and there were seven types of fertilization treatment, namely, no fertilization treatment (CK); low-volume (T1, 330 kg/hm2), medium-volume (T2, 660 kg/hm2), and high-volume inorganic fertilizer treatments (T3, 990 kg/hm2); and three inorganic fertilizer treatments of low-volume inorganic fertilizer (T1, 330 kg/hm2) combined with low-volume (F1, T1 + 75 kg/hm2), medium-volume (F2, T1 + 225 kg/hm2), and high-volume (F3, T1 + 375 kg/hm2) organic fertilizer. A total of 14 experimental treatments were implemented for irrigation and fertilization. The results of the two-year experiment show that the growth effect on the height, stem diameter, and leaf area index of tomato plants was the best using the treatment of low-concentration inorganic fertilizer combined with medium-concentration organic fertilizer with Moistube irrigation and drip irrigation. Using the two irrigation methods, the application of soluble organic fertilizer increased the yield and improved the fruit quality of the tomato. The maximum yield increased by 28.52%, the soluble sugar content increased by 14.49%, the vitamin C content increased by 45.04%, and the lycopene increased by 18.79%. The entropy-weight TOPSIS model was used to comprehensively evaluate 14 evaluation objects with different irrigation methods and fertilization treatments. The results of the two-year experiment show that the best fertilization treatment under Moistube irrigation and drip irrigation conditions was low-concentration inorganic fertilizer combined with medium-concentration soluble organic fertilizer, which was combined with the best fertilization treatment, and the most suitable irrigation method for greenhouse tomato cultivation in the Loess Plateau was Moistube irrigation. The results of this study also provide practical experience and theoretical support for adaptive irrigation and the integrated management of water and fertilizer.

The Effect of Combination of Organic Fertilizer and Rice Husk Biochar on Growth, Production, Available N and N Absorption of Soybean (Glycine Max L) in Ultisol Soil

This research was conducted on Jl. Bunga Sedap malam XVIII Medan North Sumatra with an altitude of ± 30 meters above sea level (masl), this research took place from February to April 2022. This study used the Non Factorial Randomized Group Design method. Factor B1 = Control, B2 = Organic fertilizer 15 tons/ha, B3 = Rice husk biochar 15 tons/ha, B4 = Organic fertilizer 12.5 tons/ha + Rice husk biochar 2.5 tons/ha, B5 = Organic fertilizer 10 tons/ha + Rice husk biochar 5 tons/ha, B6 = Organic fertilizer 7.5 tons/ha + Biochar rice husk 7.5 tons/ha, B7 = Organic fertilizer 5 tons/ha + Biochar rice husk 10 tons/ha, B8 = Organic fertilizer 2.5 tons/ha + Biochar rice husk 12.5 tons/ha. From the results of the study it can be concluded that the treatment of cow organic fertilizer and rice husk biochar had a significant effect on plant height, number of branches, root nodules, wet weight of pods/plot, dry weight of pods/plot, soil pH, base saturation (KB), and N absorbed, but had no significant effect on the number of filled pods, number of empty pods, cation exchange capacity (CEC), and N available. The average number of filled pods was highest in treatment B4 (36.67%) and lowest in treatment B1 (1.33%). The highest average cation exchange capacity (CEC) was found in treatment B2 (18.76m3/100g) and the lowest average was found in treatment B6 (10.79me/100g). The highest average available N was found in treatment B2 (4.13%) and the lowest was found in treatment B8 (3.15%).

Growth and Yield of Three Soybean Cultivars on a Combination of Cow Manure and NPK Fertilizers on Sandy Land

Food security is an important issue and must be pursued by utilizing all potential resources. Sandy land is a potential resource to be developed as agricultural land due to the decline in fertile land. However, sandy land has a limiting factor for plant growth and yield, namely fertility. This research aimed to determine the effect of cow manure and NPK fertilizer on the growth and yield of three soybean varieties on sandy land. The research was conducted from January to May 2022 on sandy land in Bengkulu. Each experimental plot was arranged based on a randomized block design. The first factor was soybean cultivar, and the second was a combination of cow manure and NPK fertilizer doses. Each treatment was repeated three times. The results showed that the three soybean varieties evaluated showed different characteristics due to genetic diversity. Applying a combination of organic fertilizers in all proportions did not significantly affect the growth and yield of soybeans except for the weight of 100 seeds. NPK fertilizer application showed better growth and yields.

Growth and Yield of Meranti Tomatoes (Lycopercium pipinelifoliu) Effect of Chrysanthemum Flower Waste Organic Fertilizer (Chrysanthemum morifolium) and Mutiara NPK Anorganic

The purpose of this study was to obtain the right dose of organic fertilizer combination of chrysanthemum flower waste and NPK Mutiara inorganic fertilizer to support the growth and efficiency of nutrient absorption levels of tomato meranti plants. The method used in this study was a complete randomized design (RAK) with 4 treatments and each treatment was repeated 6 time. The treatment made is P0: 500 kg ha-1 NPK Mutiara (100% NPK); P1: Dose of Organic Fertilizer Chrysanthemum Waste 15 Tons ha-1 + 25 % NPK; P2: Dose of Organic Fertilizer Chrysanthemum Waste 10 Tons ha-1 + 50 % NPK; P3: Dose of Organic Fertilizer Chrysanthemum Waste 5 Tons ha-1 + 75 % NPK. With observation parameters, namely plant height, number of leaves, leaf area, dry weight of upper plants, dry weight of lower plants, total dry weight of plants, leaf area index, net assimilation rate, and plant growth rate. The results showed that with the addition of organic matter of chrysanthemum waste fertilizer combined with NPK inorganic fertilizer was able to support the growth of meranti tomato plants in the vegetative phase of plants with a combined dose of chrysanthemum fertilizer 5 tons Ha-1 + 75% NPK showed the best results on plant height parameters, number of leaves and dry weight of plants.

Combination of Organic Fertilizer from Catfish Wastewater (Clarias gariepinus) with Inorganic Fertilizer for Best Growth of Chili (Capsicum frutescens)

This study was designed to observe the effects of catfish wastewater as a fertilizer on the growth and yield of chilli pepper (Capsicum frutescens). The aim of our research is to find out the alternative to reduce the usage of inorganic fertilizers for chilli cultivation. In addition, it is also to investigate the potential of catfish wastewater as an organic fertilizer for chili pepper cultivation. Three treatments were used to evaluate the effect of fertilizers on chili pepper growth performance, and they were as follows: organic fertilizers (catfish wastewater) (T1), co-application of organic and inorganic fertilizers (T2), and inorganic fertilizer (T3). The data collected for growth and yield included the average (±) height (cm), Number of leaves, Leaf width (cm), Number of buds, Weight of fruits, Length of fruits and Number of fruits. Based on the results obtained from this experiment, T2 fertilizer, which applies a combination of organic (catfish wastewater) with inorganic fertilizer, shows higher growth, quality, and yield performance than control treatment using inorganic fertilizer only. However, the lowest growth, quality and yield showed the fertilizers from organic (catfish wastewater) only. Thus, organic (catfish wastewater) has good potential as an alternative fertilizer same as chicken dung and cow dung that can be used for crops.

Evaluation of the effect of sugar mud and organic fertilizers on the productivity of sugar beets in the conditions of Podillia

The application of lime fertilizer “defecation” on acidic and slightly acidic soils has a multifaceted positive effect, eliminating excessive acidity, and creating optimal environmental conditions for agricultural plants and soil microorganisms, increases the water resistance of structural soil aggregates, which determines favourable water and air modes, increases the accumulation of phosphorus, potassium. The goal is to investigate the influence of sugar mud and organic fertilizers on the productivity of sugar beets in the conditions of Podillia. In the presented study was carried out using such methods as field, measuring and weighing, laboratory, statistical. According to the results of the experiment, it was determined that the productivity of sugar beets increased depending on the doses of applied fertilizers. Thus, with the application of 2.0 Hr of sugar mud, the yield increase amounted to 15.27 t/ha. The combination of organic fertilizer and sugar mud 2.0 Hr had the strongest effect on productivity – 29.41 t/ha. The collection of sugar increased according to the experimental variants mainly due to the increase in yield. The increase in digestion was insignificant: from 0.08 to 0.56% according to the experiment variants. The segment of crop production will be profitable due to the drivers of the volume of the harvested crop. The side economic effect of the application of this measure will be to obtain a larger sugar harvest per hectare, which will allow to obtain a larger profit from the processing of sugar beets into sugar. The practical value of the research lies in the formation of recommendations for farms and agricultural enterprises growing sugar beet on acidic and slightly acidic soils in order to increase its productivity

Application of Defoliated Chrysanthemum Leaves and Combination of Organic Fertilizer to the Yield and Quality of Chrysanthemum Flowers

The market value of horticultural products, particularly ornamental plants, is quite high. It is necessary to conduct research on the introduction of appropriate technology for increasing the intensity of chrysanthemum cultivation, such as the use of chrysanthemum leaf messenger and a combination of manure, which is formulated with local resources in chrysanthemum flowers to improve quality and add value and utilize the potential of agricultural resources that are easy to apply based on the capacity of farmers and have a real impact on increasing income. This study's objective was to determine the optimal concentration of chrysanthemum leaves and the optimal combination of manure for enhancing the production and quality of chrysanthemums. Using a Factorial Randomized Block Design, field research is conducted in a greenhouse using two factors: the dosage of defoliated chrysanthemum leaves and a mixture of manure. The obtained data were statistically analyzed using the ANOVA test. If the effect of a single treatment is genuine or very real, the average value test is continued. Least significant difference (LSD) is 5%, whereas Duncan's 5% indicates an interaction between the two factors tested. The treatment of defoliated leaves had a real to very real effect on all variables, with the exception of stem diameter, whereas the combination treatment of organic fertilizers had a real to very real effect on all variables. The interaction between the quantity of defoliated leaves and the combination of organic fertilizer has no significant effect on all variables. The administration of a dose of 5 tons/ha and the combined use of goat manure and pig manure increased the length of the flower stalk, the weight of the flower stalk, the diameter of the stem, the diameter of the flower, the fresh weight of the most cost-effective flowers, and the proportion of leaves infected with rust. According to SNI 01-4478-88, the chrysanthemums produced in this investigation are of quality class A.
 
 

The Effect of the Combination of Organic Fertilizer and Spraying with Silicon and Calcium on the Growth and Production of Three Cultivars of Beet

Field experiments were carried out for the autumn season 2022- 2021 in the field of College of Agricultural Engineering Sciences - University of Baghdad - Jadiriyah Complex –Station A- to study a combination of organic fertilizer (Vermicompost) and cow manure as well as a control treatment (soil only) intertwined with Spraying with silicon, calcium and distilled water (control) in the growth and production of three cultivars of beet (Cylindra, Dark Red, Red) within the design of Completely Randomized Block Design at three replications, The number of treatments was 9 for each replicate. The means were compared according to the least significant difference (L.S.D) at a probability level of 5 %, the results were as follows:-The interaction treatment of the Vermicompost with calcium spraying in the number of leaves, the concentration of chlorophyll, the percentage of nitrogen and phosphorous), was significantly superior to the combination of Vermicompost with spraying silicon significantly (in the percentage of potassium, the concentration of silicon, the root yield, the leaf yield, the percentage of dry matter, phenols and sugars), at a rate of (387.67,3%.28 mg kg−1, 35.88 ton h−1, 50 ton h−1, 8.78%, 014% and 889%) respectively. As for the percentage of calcium, it was characterized by the combination treatment of cow manure with calcium spray, and the combination of cow manure with silicon spray was superior in T.S.S. and the percentage of fiber at 3.17 and 11.66% respectively for the Red variety.As for the variety Red Dark it was significantly superior to the mixture of the medium vericompost with silicon spray in the number of leaves, the concentration of chlorophyll and the percentage of nitrogen, the concentration of silicon, Root yield and leaf yield Percentage of dry matter T.S.S, phenols and sugars at (10 leaf plant−1, 82.2 mg 100 fresh wet−1, 3.53%, 313.00 mg kg−1, 36.35 ton h−1, 40.92 ton h−1, 6.86%, 11.03%, 0.16% and 845%) respectively, while the percentage of phosphorous and potassium, it was characterized by the combination of cow manure with silicon spray, and the combination of vermicompost with calcium spray was superior to the percentage of calcium and the percentage of fiber by giving it 2.19% and 2.50% respectively. As for the variety Cylindra it was significantly superior to the combination of the Vericompost with silicon spray in the number of leaves, concentration of chlorophyll, percentage of nitrogen, phosphorous, silicon, root yield, leaf yield, Percentage of dry matter, T.S.S, Whereas, the treatment with cow manure overlapping with silicon was superior in the percentage of potassium, phenols and sugars, as it gave 4.11% 0.13 and 665% respectively, The treatment of the Vermicompost with calcium spray was characterized in the percentage of calcium as it gave 1.65%.

Efektivitas Kombinasi POC Azolla microphylla dan Ampas Teh terhadap Pertumbuhan Tanaman Kangkung (Ipomea reptans Poir)

Water spinach (Ipomea reptans Poir) is a horticultural product that has high economic and nutritional value for the health of the human body. This research was conducted to determine the effectiveness of the combination of POC Azolla microphylla and tea dregs on the growth of water spinach plants. The research method used was an experiment with a completely randomized design (CRD) with 2 factors including the volume of POC administration which consisted of 4 levels (V0 = control, V1 = 150 ml, V2 = 250 ml, and V3 = 250 ml) and the time interval for giving POC. consists of 2 levels (I1 = 3 days, and I2 = 6 days). The parameters used in this study were plant height, number of leaves, and wet weight. Data were analyzed using Kruskal Wallis. The results showed that giving a volume of 250 ml of POC at intervals of 6 days gave the best results with an average plant height of 8.6 cm, 3 leaves and 0.86 gram fresh weight. Based on this, it can be concluded that the application of liquid organic fertilizer combination of Azolla microphylla and tea dregs is effective for the growth of water spinach plants.

A combination of organic fertilizers partially substitution with alternate wet and dry irrigation could further reduce greenhouse gases emission in rice field

Alternate wet and dry (AWD) irrigation and organic fertilizers substitution (OFS) have contrasting effects on CH4 and N2O emissions in rice cultivation. Combining these two practices may be feasible for simultaneous reduction of CH4 and N2O emission from paddy. Hence, we conducted a two-year field experiment to explore the reduction of greenhouse gases under the combination of AWD and OFS. The field experiment which was designed with two irrigation methods (continuous flooding (CF) irrigation and AWD irrigation), and five nitrogen regimes (N0, N135, and N180 represent 0, 135, and 180 kg N ha-1, respectively, ON25 and ON50 represent 25% and 50% OFS for inorganic fertilizer, respectively). The results showed a single-peak emission for CH4 fluxes during the whole rice growing season in all water and nitrogen treatments while the N2O fluxes peak only observed during tillering period with AWD irrigation. AWD irrigation and OFS showed a limited reduction in global warming potential (GWP). These were owing to that AWD irrigation reduced 38.3% CH4 emissions while increase 145.9% N2O emissions when compared to CF irrigation, and the low rate (25%) OFS only reduced CH4 emission by 29.4% while high rate (50%) only reduce N2O emission by 38.8% when compared to conventional inorganic nitrogen fertilizer (N180). Combined AWD and ON25 could maximize the reduction in GWP and yield-scaled GWP, which were reduce 58.0% and 52.5%, respectively, compare to the conventional water and nitrogen management (CF and N180). Furthermore, the structural equation modelling (SEM) indicated that the soil dissolved organic carbon (DOC) and rice aboveground biomass showed a significant positive effect on CH4 fluxes while soil NH4+ with a negative effect, and the soil NH4+, nitrification potential, denitrification potential significant affected N2O fluxes with a positive effect while DOC with a negative effect. These results investigated that 25% OFS rate for inorganic fertilizer could further reduce warming potential in AWD irrigation rice field.

The effect combination of organic and inorganic fertilizer on okra (Abelmoschus esculentus) growth

Okra (Abelmoschus esculentus) is the most commonly and popular vegetables. The application of inorganic fertilizer is very important to increase the productivity of the crop, but overuse of inorganic fertilizer can lead to soil acidification that can affect the plant growth. The purpose of these study is to determine the effectiveness combination rate of organic and inorganic fertilizer toward okra growth and yield performance. This study was conducted in a greenhouse by using Randomized Complete Block Design (RCBD) with four replicates. The study was used chicken dung as organic fertilizer. The treatments applied were T0 (NPK), T1 (NPK + 20 g chicken dung), T2 (NPK + 40 g chicken dung), and T3 (NPK + 60 g chicken dung). NPK green was applied only one-time during 14 days after sowing (DAS) and was continued with NPK blue. T3 showed an increasing in fresh pod yield. Thus, combination of organic fertilizer and inorganic fertilizer was showed the positive effect to the crop production. The combination of organic and inorganic fertilizer was proven to be the most effective in okra production.

Cultivation of winter triticale in the organic production system

Aim. To find and substantiate the optimal combination of elements of winter triticale cultivation technology in the organic farming system based on the use of green manure, biological products and growth stimulants of organic origin to obtain competitive organic products. This article analyses the results of research obtained in a semi-stationary experiment of the National Research Centre "Institute of Agriculture of NAAS" on the cultivation of winter triticale in an organic farming system during 2019-2020. Methods. During the research, we used field (to determine the interaction of the object with natural and studied factors), weight (to determine the yield and its structure), morphophysiological (for biological control over the growth and development of productivity elements by stages of organogenesis), laboratory (chemical and physicochemical analysis of the main products), as well as mathematical statistics using basic and special statistical indicators and criteria. Results. Work carried out, it was found that the highest yield of winter triticale 4.57 t/ha was noted in the variant where the combined application of organic-mineral fertilizer Rokogumin (3 times 5 l/ha, respectively, at 27-28, 30-31, and 58-59 stages of plant development) and organic fertiliser Bio-gel (2 times at 1.5 l/ha, respectively, at 27-28 and 30-31 stages) in combination with growth regulator Regoplant (2 times - at 27-28 and 30-31 stages, 50 ml/ha) against the background of green manure (30 t/ha of green mass of peas). This crop productivity was formed due to the optimal parameters of crop cenosis. In particular, the number of productive stems that survived until harvesting was 460 pcs/m², with a grain weight per ear of 0.99 g. Such a density of winter triticale greatly affected the weediness of crops. In the process of growth and development of the main crop cenosis, weed growth was suppressed, and some of them were suspended, and their number in the phase of full ripeness of winter triticale decreased, depending on the experimental variants by 90-95%, to 20-33 pcs/m².With regard to diseases (powdery mildew and leaf septoria) of winter triticale, there was also a slight tendency to reduce the damage to plants from the action of biological products. However, the obtained two-year results do not allow us to conclude on the fungicidal effect of the studied preparations. Conclusion. Such a combination of organic fertilizers and growth stimulant provided an increase in the yield of winter triticale by 0.55 t/ha and provided 23435 UAH/ha of net profit at 249% profitability. There is a tendency of high resistance of winter triticale to the negative impact of pests and diseases, and an increase in the degree of competitiveness of plants in the fight against weeds due to an increase in the density of cenosis. This crop is well suited for growing in an organic farming system.

Effect of Inorganic and Integrated Long-term Nutrient Management on DTPA-extractable Micronutrients in a Vertisol under Soybean-wheat Cropping System across the Soil Depth

The status of DTPA extractable micronutrient (Zn, Cu, Fe and Mn) in response of continuous application of different inorganic and organic fertilizer combination in a 48 years old ongoing long-term fertilizer experiment (AICRP-LTFE) were investigated in Vertisol at Department of Soil Science, and Agricultural Chemistry, JNKVV, Jabalpur under intensive cultivation of soybean- wheat cropping system in 2021. The treatments selected for the study were: control (T1); 100% NP(T2); 100% NPK (T3); 100% NPK+FYM (T4); 100% N(T5); 50% NPK (T6); 150% NPK (T7). Application of FYM along with balance fertilizer (100% NPK) significantly increased the micronutrients availability in soil. On contrast, Imbalance fertilization caused a lower level of micronutrients in soil even below to the critical limit in case of zinc. A decreasing trend with increase in soil depth irrespective of type of nutrient management and micronutrient type was evident in the study. Findings of the present study emphasized the application of balance fertilization along with organic sources like FYM for sustaining micronutrients availability in Vertisol under soybean-wheat cropping system.

Exploration of bacterial diversity from the soil of citrus plantations applied with organic fertilizer and salicylic acid

The abundance of bacteria in citrus plantations has not been widely studied. This study aims to explore and evaluate the abundance of soil bacteria on citrus plantations. Several treatments were given to them, organic fertilizer and plant resistance inducers. The research was carried out in July - September 2022 at the Innovation Garden and at the Laboratory of Plant Protection, Politeknik Negeri Jember. This study initiated the application of treatment on citrus plantations and isolation of bacteria using multilevel dilution technique. The design used was a randomized block design, which consisted of the application of organic fertilizer and salicylic acid. Organic fertilizer application consists of control, half dose, and recommended dose. Application of 100 ppm salicylic acid watered to the plant. There were 6 treatments, with 3 replications and 2 plants each, a total of 36 plants. The results showed that 45 various bacteria were found with different morphology with a total population 20x109 - 20x1011 CFU/gr. All treatments gave almost the same results. The application of 20 kg of organic fertilizer and 100 ppm of salicylic acid gave the highest bacterial diversity as shown by the number of different bacterial isolates. The combination of organic fertilizer and salicylic acid provides new information about the abundance and diversity of bacteria in citrus plantations.

Responses of soil microbial biomass nitrogen to organic fertilizer with different degrees of maturity and regu-lation to soil mineral nitrogen.

By combining the composting process with soil culture experiment, we conducted an experiment with four treatments, including conventional chemical fertilizer (CK), chemical fertilizer + compost maturity reaching 50% germination index (GI, the same below) organic fertilizer (CO1), chemical fertilizer + compost maturity reaching 80% GI organic fertilizer (CO2), chemical fertilizer + compost maturity reaching 100% GI organic ferti-lizer (CO3). We measured soil microbial biomass nitrogen (MBN), mineral nitrogen (NH4+-N, NO3--N), net nitrification rate, microbial biomass carbon (MBC), dissolved organic carbon (DOC), soil urease and soil protease, aiming to reveal the regulatory effect of soil MBN on mineral nitrogen. The results showed that organic fertilizer application significantly increased MBN and NH4+-N concentrations by 50.1%-62.4% and 109.9%-147.1%, reduced NO3--N concentration and net nitrification rate by 23.3%-46.8%, and 26.2%-51.5%, and enhanced MBC, DOC, urease and protease activities by 33.8%-69.6%, 7.4%-20.8%, 11.2%-69.0% and 9.4%-25.1%, respectively. The change ranges of CO2 and CO3 were significantly higher than CO1. Redundancy analysis (RDA) and structural equation model (SEM) results showed that the application of organic fertilizer with higher degree of maturity (GI≥80%) positively regulated soil MBC, MBN, NH4+-N, and the activities of urease and protease, but had a negative effect on soil net nitrification rate. The combined application of chemical fertilizers and high decomposed organic fertilizers could significantly increase soil MBN and NH4+-N contents, as well as soil urease and protease activities, but reduce soil net nitrification rate. To efficiently utilize organic solid wastes, it is recommended to use chemical fertilizer in combination of organic fertilizers with 80% decomposing degree in practical production to reduce the cost in both economy and time.

Atributos químicos do solo sob combinações de adubação orgânica e salinidade da água

ABSTRACT The use of brackish water causes chemical changes in cultivated soils. It is therefore necessary to apply strategies that can minimize its negative impacts, such as the use of organic fertilizers. This study aimed to evaluate in the field the chemical attributes of a Red Yellow Argisol under irrigation with saline water and organic fertilizing in an area cultivated with corn. The design was randomized blocks, in a split-plot scheme, with the plots comprising salinity levels for the irrigation water (0.8 and 3.0 dS m-1) and the subplots combinations of organic fertilizers (cattle manure + poultry biofertilizer + goat biofertilizer; cattle manure + goat biofertilizer; cattle manure + poultry biofertilizer; control), with four replications. The 3.0 dS m-1 irrigation has a negative effect on the soil chemical attributes, particularly reducing the pH and increasing the sodium, exchangeable sodium percentage and electrical conductivity of the soil saturation extract. The combination of cattle manure + poultry biofertilizer + goat biofertilizer mitigates the salt stress by favouring the accumulation of nitrogen and organic matter, while the cattle manure + poultry biofertilizer favours the potassium accumulation in the soil. The combination of cattle manure + poultry biofertilizer + goat biofertilizer increases the contents of phosphorus and potassium when using the 0.8 dS m-1 irrigation.