Different Doses Of Nitrogen Research Articles

The Effect of Different Doses of Nitrogen and Seed Treatment with Biofertilizers on Growth, Yield and Seed Quality of Sunflower (Helianthus annus L.)

Aims: To study the effect of Different Doses of Nitrogen and Seed Treatment with Biofertilizers on Growth, Yield and Seed Quality of Sunflower. Study Design: The experiment was laid out in a randomized block design with eleven treatments replicated thrice. Place and Duration of Study: The field experiment was conducted during rabi season of 2019-20, 2020-21, 2021-22 and 2022-2023 in the Instructional Farm of Ramkrishna Ashram Krishi Vigyan Kendra, Nimpith, South 24 Parganas, West Bengal. Methodology: The experiment was carried out in randomized block design with eleven treatments and replicated thrice. The treatments were Control, 50% N, 100% N (90 kg N/ha), Azospirillum (seed treatment), Azatobacter (seed treatment), Azospirillum +Azatobacter (seed treatment), 50% N + Azospirillum (seed treatment), 50% N + Azatobacter (seed treatment), 50% N +Azospirillum + Azatobacter (seed treatment), 75% N + Azospirillum + Azatobacter (seed treatment) and 100% N + Azospirillum + Azatobacter (seed treatment). A common dose of Nitrogen@ 90kg/ha, phosphorus @90kg/ha and potash @40kg/ha were applied. Results: Higher head diameter (13.82 cm), 1000 seed weight (65.50 g), seed yield (1830 kg/ha), oil yield (628.80 kg/ha), gross return (Rs.48581), net return (Rs.26368) and B:C (2.19) than all other treatment followed by T10 (75% N + Azospirillum + Azotobacter) and T3 (100% N) which were statistically at par with each other. Conclusion: On the basis of all parameter as well as economics it can be concluded that treatment T10 (75% N + Azospirillum + Azotobacter) can be recommended for better benefit and sustainable production of sunflower. The results of this experiment showed that use of chemical fertilizers can be reduced by using a combination of bio-fertilizers and inorganic nitrogen fertilizer.

Effect of Nano Urea on Growth, Yield and Nutrient uptake of Finger Millet (Eleusine coracana L.)

Aim: The foliar application of nano urea is aimed at reducing the soil application of conventional urea. Nano fertilizers enhance crop growth and yield while enhancing nutrient uptake and reducing costs. They provide precise nutrient management, match crop growth stages, and offer an increased surface area for metabolic reactions. This boosts photosynthesis, leading to higher dry matter production and crop yield. Foliar application of nano urea (liquid) at tillering and booting stages in finger millet fulfills the nitrogen requirement and reflects higher crop productivity. Higher productivity of crops in a sustainable manner could be achieved by applying an appropriate combination of conventional fertilizers and nano fertilizers. Study Design: The experiment was laid out in split design with three replications. Place and Duration of Study: A field experiment was conducted in deep black soils at Agricultural Research Station, Siruguppa, during kharif 2022. Methodology: There were sixteen treatment combinations, consisting of different doses of nitrogen (no nitrogen, 50% RDN, 75% RDN and 100% RDN) with different concentrations of nano urea and conventional urea sprayed at tillering and booting stages for HR-13 variety of finger millet. Results: Application of 100% RDN has recorded significantly higher plant height, tillers plant-1, total dry matter accumulation, grain yield and straw yield (129.82 cm, 10.10, 36.17 g plant-1, 36.87 q ha-1 and 71.72 q ha-1, respectively) in comparison to no nitrogen and 50% RDN. However, 75% RDN (123.04 cm, 9.61, 34.02 g plant-1, 34.84 q ha-1 and 68.01 q ha-1, respectively) found on par with 100% RDN. Among foliar nitrogen, spray of nano urea @ 4 ml L-1 recorded significantly higher plant height (121.59 cm), tillers plant-1 (9.37), total dry matter accumulation (33.16 g plant-1), grain yield (31.97 q ha-1) and straw yield (65.52 q ha-1) compared to 0.5% and 1% conventional urea. However, nano urea @ 2 ml L-1 was on par with 4 ml L-1 nano urea and 1% conventional urea. Similar trend was recorded with regard to nutrient uptake by finger millet. Conclusion: Foliar application of nano urea reduced the dosage of conventional urea by 25 per cent.

Effect of Different Doses of Nitrogen on Growth and Grain Yield of Hybrid Maize (Zea mays L., Gold 97)

This study investigates the impact of various nitrogen doses on the growth and grain yield of hybrid maize (Zea mays L., Gold 97). Nitrogen plays an important role in crop phenology, morphology, and grain yield of maize plants. A field experiment was conducted in a randomized complete block design with six levels of nitrogen (150, 160, 170, 180, 190, and 200 kg/ha) in four replications to evaluate the effect of different doses of nitrogen on the growth and yield of maize. Germination percentage, Days to 75% tasselling and silking, plant height, number of leaves, leaf area (LAI), cobs length, grain per row, pod, and total grain yield were recorded. Maximum germination was found in 180 kg N /ha. Plant height, number of leaves, and leaf area (LAI) were found to be maximum in the plots treated with 180-200 kg/ha of N. This field experiment revealed that different nitrogen dose has significant effects on days to 75% Tasselling and silking and found to be maximum in 180 kg/ha N treated plot. Also, nitrogen has a significant effect on cobs length, and grain per row was found highest at 180 kg N/ha. The highest Grain yield was found 180 kg/ha N treated plot. Findings have demonstrated that increasing nitrogen levels can often lead to increased grain yield up to a certain point, after which the yield plateaus or even declines. These findings provide valuable guidance for optimizing agricultural practices to meet the increasing global demand for cereal crops.

Yield and composition of rosemary essential oil cultivated with different doses of nitrogen and sulfur

Yield and composition of rosemary essential oil cultivated with different doses of nitrogen and sulfur

Effects of Different Doses of Nitrogen on Growth and Nitrogen Use Efficiency of Maize (Zea mays L.) in Berekum Municipality of Ghana

Background: Adequate and balanced use of plant nutrients could increase crop performance and reduce adverse environmental effects. Farmers in Berekum have little information on the specific rate of nutrient, especially nitrogen application for hybrid and open pollinated maize varieties. Methods: A field experiment was carried out in Berekum Municipality of Ghana to determine the effects of different doses of N fertilizer (0, 90, 120 and 150 kg N ha-1) on growth and nitrogen use efficiency (NUE) of Pannar 12 (hybrid) and Omankwa (open-pollinated) maize varieties. The experiment was conducted in a factorial randomized block design and replicated thrice. Result: Experimental results revealed that incremental doses of nitrogen significantly impacted vegetative growth and NUE of maize. The studies indicated that the growth response in terms of plant height, number of leaves per plant and stem diameter of Omankwa was better than that of Pannar 12. It was found that in the main cropping period of 2019, the maximum NUE of 14.58 kg/kg was gained when Pannar 12 was grown with 150 kg N ha-1, while the highest NUE (15.91 kg/kg) was recorded when Omankwa was grown with 90 kg N ha-1. In the minor season of 2019, NUE was highest (13.54 kg/kg) when Pannar 12 was grown with 150 kg N ha-1, while application of 120 kg N ha-1 to Omankwa resulted in the highest NUE (10.85 kg/kg). The studies indicated that application of nitrogen at 90, 120 and 150 kg N ha-1 improved NUE in maize. However, NUE was optimized in Pannar 12 due to application of 150 kg N ha-1, while application of 90 kg N ha-1 was enough to optimize NUE in Omankwa.

Effect of different doses of nitrogen and inoculation with Azospirillum brasilense on the productive characteristics of maize

This study assessed the effects of different nitrogen doses on maize crops, with and without the inoculation of Azospirillum brasilense. The experiment was carried out during the 2020/2021 harvest season in the administrative department of Concepción, district of Horqueta, Paraguay, at the coordinates of 23°14'31.7" S and 56°53'05.9" W. The experiment followed a randomized complete block design (RCBD) arranged in a factorial design (4 X 2). Factor A included nitrogen doses (0, 40, 80, and 120 kg ha-1), while factor B corresponded to the bacterial inoculation (with and without A. brasilense). The experiment was performed in three replications; each experimental unit (EU) was 22.5 m2. The study evaluated the following characteristics: plant height, cob insertion height, cob length and diameter, weight of 1000 kernels, and kernel yield. The data were analyzed using analysis of variance (ANOVA), and the averages were compared using Tukey's test at a 5% probability of error. Regression analysis was also carried out during the study. The experiment results demonstrated that increased nitrogen levels positively affected the measured characteristics, fitting a quadratic model, except for cob insertion height. Inoculation with A. brasilense significantly increased corn growth and productivity. The interaction of both factors produced a significant increase in cob length. Based on the experiment results, applying 104.30 kg ha-1 of N in combination with A. brasilense inoculation is recommended for improved maize production.

The effect of soil liming, nitrogen and potassium application on the growth, development and physiological parameters of Calendula officinalis L.

The effect of soil liming and the addition of different doses of nitrogen and potassium on the growth, development and operation of FAS pot marigold plants (Calendula officinalis L. abrikosovy jam variety was studied. Experimental options: option 1 (control); option 2 (lime 4.6 t/ha); option 3 (lime 4.6 t/ha, N70K140); option 4 (lime 4.6 t/ha, N100K200). The plants were grown at an illumination intensity of PAR 200 mmol/m2, with a photoperiod of 12 hours before the flowering stage. The results of the study showed that the application of lime and mineral fertilizers significantly increased the biomass, height, leaf area of plants and the intensity of photosynthesis, accelerated the development of plants compared with the control. At the same time, the greatest influence on plant productivity was exerted by the introduction of lime into the soil, which caused a maximum increase in the intensity of photosynthesis and the water use efficiency (WUE), an increase in the number of inflorescences and their mass. The addition of urea and potassium sulfate caused an additional increase in plant weight and leaf area. There was no significant effect of nitrogen and potassium addition on the chlorophyll content, stomatal conductance, transpiration intensity and WUE.

Effect of nitrogen and boron treatments on harvest index and nitrogen use efficiency in sugar beet

The aim of this study is to examine the effect of different doses of nitrogen (N) and boron (B) treatment on sugar harvest index (SHI), nitrogen harvest index (NHI), and nitrogen use efficiency (NUE) parameters and to determine the economic optimum nitrogen rates (EONR) in sugar beet. The experiment was set up in a randomized block factorial design with three replications. Five doses of N (0, 90, 180, 270, and 360 kg N ha-1) and four doses of B (0, 2, 4, and 6 kg B ha-1) were applied in the study. According to the results of the research, the SHI decreased statistically significantly with the increase of dose of the N treatment, but the NHI was not affected by the N treatment. Physiological efficiency of nitrogen in taproot dry matter yield (NPETDMY) and physiological efficiency of nitrogen in sugar yield (NPESY) decreased statistically significantly (p<0.01) with the increase in the dose of N treatment. A similar case was observed in the parameters of nitrogen agronomic efficiency (NAgE) and nitrogen uptake efficiency (NUpE). The increase in boron treatment doses statistically significantly (p<0.01) increased the NAgE in the first year. The EONR, calculated using the quadratic model, was found to be 240 kg N ha-1 on average of two years. As a result, the nitrogen use potential decreased with the increase of N doses applied to sugar beet. The use of EONR can be recommended for optimum yield and quality in the region.

Performance of Grafted Bitter Gourd (Momordica charantia L.) at Different Pruning and Nitrogen Levels in Nawalparasi East, Nepal

Pruning and level of nitrogen influence the growth and yield of bitter gourd. A field experiment was conducted to assess the effect of different pruning and nitrogen levels on the growth and productivity of bitter gourd from March to July 2022 in Nawalparasi East, Nepal. The field experiment was laid out in a split-plot design with three replications. The treatment comprised three levels of pruning (No pruning, second generation (2G) pruning, and third generation (3G) pruning) in main plots and three different doses of nitrogen (100, 150, and 200 kg ha-1) in sub-plots. Observations on growth, floral, and yield parameters were recorded, analyzed, and presented. The research result revealed that 3G pruning with 200 kg ha-1 nitrogen level produced the highest fruit yield (16242.56 kg ha-1) at the fourth harvest. The yield trend showed higher fruit yield at higher nitrogen levels and 3G pruning at all dates of harvest. The increased fruit yield at higher nitrogen levels was because of more number of fruits per plant as well as longer fruit length and larger fruit diameter. The higher productivity in 3G pruning was mainly due to more fruit per plant at the fourth harvest. The results indicate a higher yield of bitter gourd at a higher level of nitrogen with 3G pruning.

Physicochemical and functional characteristics of peach cv. Esmeralda fertilized with different doses of nitrogen

The aim of this study was to evaluate the physicochemical and functional characteristics of fruits yielded bypeach trees which were fertilized with different doses of nitrogen. The experiment, which was installed in 2014.It had a randomized complete block design with four replicates. The nitrogen rates applied were 0, 40, 80,120, and 160 kg N per hectare. Fruits were harvested in four crops in a row (2014, 2015, 2016, and 2017). Theparameters were evaluated: soluble solids, pH, titratable acidity, epidermis and pulp firmness, attributes of pulpcolor, carotenoids, phenolic compounds, and antioxidant activity. Responses were only related to luminosity inthe first crop. However, N fertilization influenced not only the soluble solid content, pH and chroma in the secondcrop but also all attributes of color in the third crop. SS, pH, ºHue and chroma differed among treatments inthe fourth crop. The more N in the first three crops, the more carotenoids. Phenolic compounds decreasedsignificantly in the 2016 crop whereas antioxidant activity diminished in both the 2015 and 2016 crops. Eventhough an ideal dose of N cannot be recommended due to high variation in attributes in the years underevaluation, it is needed because of other factors, such as weat her.

The Effect of Different Doses of Nitrogen and Mixtures with Berseem Clover on Yield and Quality of Italian Ryegrass

The Effect of Different Doses of Nitrogen and Mixtures with Berseem Clover on Yield and Quality of Italian Ryegrass

Interactive Effect of Elevated Carbon Dioxide, Temperature and Nitrogen on the Growth Parameters of Rice at Active Tillering Stage

Ever since industrialization began, carbon dioxide [CO2] concentration in the atmosphere got increased and it consecutively raised the temperature. This change in climate would affect the agricultural production and crop growth. A pot culture experiment was conducted during the Kuruvai season (June - September) of the year 2023 at Anbil Dharmalingam Agricultural College & Research Institute, Tiruchirappalli to assess the rice growth up to active tillering stage under elevated [CO2] and temperature conditions at different doses of nitrogen (N) fertilization. Rice seedlings were grown inside the four Open Top Chambers (OTC) at ambient (422 ppm) and elevated CO2 (550 ppm) conditions as well as chamber controlled and elevated temperature (+2°C) with four different doses of N (control, 100% recommended dose of N (RDN), 150% RDN and 200% RDN). Plant growth parameters like plant height, number of tillers, leaf area, root length and root volume, root and shoot dry matter were increased significantly under elevated [CO2] (eCO2) conditions. Whereas, all the growth parameters were severely influenced by increased temperature. Increasing N concentration increased the plant growth irrespective of the treatments and the effect was more pronounced in eCO2 treatment due to the fertilization effect of [CO2] as it directly necessitates photosynthesis which improves overall growth of rice plants. Under the future changing climatic conditions suitable N doses should be optimized for the better crop production.

Seed Microbiolization Associate With Nitrogen Doses Increase the Nutrition of Tomato Fruits

Endophytic bacteria can promote growth and improve the quality of plant production. The objective of this work was to evaluate the efficiency of inoculation of a mix of non-host endophytic bacteria isolates in the nutrition of tomato fruits cultivated, fertilized with rock powder and different doses of nitrogen. The experimental design was in randomized blocks, in a factorial arrangement (2 × 6 + 3), with four replications. The treatments consisted of two methods of inoculation of the mix of endophytic bacteria: seed microbiolization and post-emergence inoculation; six doses of nitrogen fertilization: 0, 129, 258, 387, 516 and 645 kg ha-1; and 3 controls (without inoculation of the bacterial mix). The average export of macro and micronutrients in tomato fruits was, in descending order: K > N > P > Ca > Mg > S (averages of 1.33; 0.46; 0.07; 0.06; 0.05 and 0.05 g plant-1, respectively) and Mn > Cu > Fe > Zn (means of 2.67; 1.98; 1.71 and 0.79 mg plant-1, respectively). The inoculation method by seed microbiolization associated with nitrogen doses promoted significant increment in the dry mass of the fruits and in the content of the nutrients P, Ca, Zn, Fe and Mn.

Evaluation of the Quality of Raspberries (Rubus idaeus L.) Grown in Balanced Fertilization Conditions

(Background) Raspberry (R. idaeus L.) is very popular with consumers around the world for its intense flavor, attractive appearance, and health benefits. In recent years, interest in healthy eating and natural products has increased, and raspberry fits perfectly into these trends, which translates into its greater importance on the consumer market. (Aim) The aim of this study was the commodity evaluation of raspberry fruits bearing fruit on 2-year-old shoots, cultivated under conditions of varied nitrogen fertilization against the background of constant phosphorus-potassium fertilization. (Methodology) The first-order factors were cultivars (‘Laszka’ and ‘Glen Ample’), and the second-order factor was nitrogen fertilization (0, 50, 100, and 150 kg N ha−1), against the background of constant phosphorus-potassium fertilization (100 kg P2O5 and 120 kg K2O ha−1). The experiment was set up in a dependent split-plot design with three repetitions. (Results) The importance of raspberry on the consumer market was shaped by taste and quality of fruit, health benefits, naturalness and freshness, universality of use, availability, and nutritional trends. (Conclusions) The tested cultivars were characterized by similar production and quality capabilities. Fertilization of the tested cultivars with a dose of 135 kg N·ha−1 turned out to be justified in terms of yield. Increasing nitrogen doses resulted in a significant increase in fresh fruit yield and fruit weight. Different doses of nitrogen increased fruit resistance to mechanical damage, firmness, and quality indices.

Effect of a native bacterial consortium on growth, yield, and grain quality of durum wheat (Triticum turgidum L. subsp. durum) under different nitrogen rates in the Yaqui Valley, Mexico

ABSTRACT A field experiment was carried out to quantify the effect of a native bacterial inoculant on the growth, yield, and quality of the wheat crop, under different nitrogen (N) fertilizer rates in two agricultural seasons. Wheat was sown under field conditions at the Experimental Technology Transfer Center (CETT-910), as a representative wheat crop area from the Yaqui Valley, Sonora México. The experiment was conducted using different doses of nitrogen (0, 130, and 250 kg N ha−1) and a bacterial consortium (BC) (Bacillus subtilis TSO9, B. cabrialesii subsp. tritici TSO2T, B. subtilis TSO22, B. paralicheniformis TRQ65, and Priestia megaterium TRQ8). Results showed that the agricultural season affected chlorophyll content, spike size, grains per spike, protein content, and whole meal yellowness. The highest chlorophyll and Normalized Difference Vegetation Index (NDVI) values, as well as lower canopy temperature values, were observed in treatments under the application of 130 and 250 kg N ha−1 (the conventional Nitrogen dose). Wheat quality parameters such as yellow berry, protein content, Sodium dodecyl sulfate (SDS)-Sedimentation, and whole meal yellowness were affected by the N dose. Moreover, the application of the native bacterial consortium, under 130 kg N ha−1, resulted in a higher spike length and grain number per spike, which led to a higher yield (+1.0 ton ha−1 vs. un-inoculated treatment), without compromising the quality of grains. In conclusion, the use of this bacterial consortium has the potential to significantly enhance wheat growth, yield, and quality while reducing the nitrogen fertilizer application, thereby offering a promising agro-biotechnological alternative for improving wheat production.

Cotton nitrogen doses in the edaphoclimatical conditions of northeastern Brazil

The study of cotton plant responses to nitrogen fertilization in different climate and soil conditions is essential for the correct management of nitrogen in this crop. Therefore, the objective of the present study was to evaluate the responses of cotton plants to nitrogen fertilization in the edaphoclimatic conditions of the Cariri region, located in the northeastern State of Ceará, Brazil. The experiment was conducted in an experimental area at the CENTEC (Centre for Technological Education) School of Technology (FATEC - Cariri campus), located in the city of Juazeiro do Norte, Ceará State. The statistical design adopted was Completely Randomized Design (CRD). The treatments were composed from the combination of four doses of nitrogen (0, 60, 120, and 180 kg ha-1 of N, equivalent to 0, 50, 100, and 150% of the N recommendation for the crop) with four replications. Urea was used as a nitrogen source. At 42 days after sowing, the plants were collected. Plant height, number of leaves, stem diameter, leaf area, absolute growth rate, shoot and root dry matter, total and nitrogen use efficiency were evaluated. The different doses of nitrogen significantly influenced all the analysed variables. In general, nitrogen doses greater than 120 kg ha-1 of N were shown to impair the growth and dry matter production of the cotton plant in the climate and soil conditions of the Cariri region, northeastern Brazil. In addition, excessive nitrogen fertilization was shown to reduce the efficiency of nitrogen use by the cotton crop.

Effect of Nitrogen Doses in Boro Rice Grown with Variable Levels of Floating Duckweed

An experiment was carried out at the Agronomy Research Farm of Sher-e-Bangla Agricultural University, Dhaka during the period from November 2018 to June 2019 to study the nitrogen requirement of boro rice grown with floating duckweed. The experiment was laid out in a Factorial Randomized Complete Block Design with three replications. The treatments were duckweed: viz. D0 = Control (0 g duckweeds m-2), D1 = 200 g duckweeds m-2, D2 = 400 g duckweeds m-2 and D3 = 600 g duckweeds m-2) and nitrogen treatment: N1 = 45 kg N ha-1, N2 = 90 kg N ha-1 and N3 = 180 kg N ha-1). Different doses of duckweeds showed significant influence on most of the parameters of which D2 (400 g duckweeds m-2) treatment the best performance on growth and yield parameters of rice. Among different doses of nitrogen, N2 (90 kg N ha-1) gave the best results on growth and yield parameters of rice. In case of combined effect, D2N2 showed the highest number of tillers hill-1 (16.40), dry weight hill-1 (48.97 g), number of effective tillers hill-1 (14.73) and number of grains panicle-1 (189.50). This treatment combination also showed the highest number of filled grains panicle-1 (183.90), panicle length (25.83 cm), 1000 -grain weight (25.13 g), seed yield (7.24 t ha-1), straw yield (8.47 t ha-1), biological yield (15.71 t ha-1) and harvest index (46.09%). On the other hand, D0N3 gave the least results on these parameters. Findings revealed that application of 400 g duckweeds m-2 with 90 kg N ha-1 showed the superiority over other treatment combinations to produce higher grain yield of boro rice.
 Bangladesh Agron. J. 2022, 25(2): 109-117

Differential response of two acidophytic lichens to increased reactive nitrogen availability

Lichens are one of the most responsive components of the ecosystem to reactive forms of nitrogen. In this work, we selected the lichen genera Cladonia and Usnea, composed of terricolous and epiphytic lichens respectively, and described as sensitive to nitrogen, to test the effects of different doses of nitrogen on lichen physiological parameters (photobiont and mycobiont vitality, chitin quantification, nitrogen content and stable isotopes analysis). The main objectives were to check if the activation of protective mechanisms could be stimulated in case of chronic stress (low nitrogen increase for prolonged time), and, if so, if a toxicity threshold could be identified above which these mechanisms fail. The two lichen genera were generally affected by prolonged exposure to increased nitrogen availability. However, Cladonia rangiformis was able to maintain physiological functioning at the lowest nitrogen doses used, whereas thalli of Usnea become overwhelmed. Moreover, the mycobiont appeared to be more sensitive than the photobiont responding to lower nitrogen doses. Although only studies of longer duration and testing more nitrogen doses will be able to determine an accurate toxicity threshold, these results give important clues on the use of lichens as biomonitors for the establishment of environmental policies.

UPTAKE OF MICROELEMENTSINOILSEED RAPE PLANTS UNDER MINERAL FERTILIZATION WITH NITROGEN AND PHOSPHORUS

With a large and growing demand in the market, rapeseed (Brassica napus subsp. napus.) is a crop with relatively high requirements for macronutrient fertilization. The aim of the experiment was to study the effect of mineral fertilization with different doses of nitrogen and phosphorus on the accumulation of microelements in the vegetative organs and grains of oilseed rape plants.The experiment was carried out in the long-term experimental fields of SCDA Livada. There were taken and analyzed 96 plant samples and the results were statistically processed. Fertilization with nitrogen and phosphorus led to statistically assured changes in the contents of microelements, mostly in the aerial parts of the rapeseed. Regarding their accumulation in the grain, there were obtained variations of contents that were not significant to all doses of fertilizer applied. The conclusions of the experiments showed that the evaluation of contents of manganese, iron, zinc, and copper in rapeseed plants can help in choosing the optimal dose of mineral fertilizers in order to assure balanced microelement composition in plants and thus, consequently to avoid their deficiency.

Growth and yield performance of cabbage (Brassica oleracea var. capitata L.) as influenced by different doses of nitrogen and zinc fertilizers

Application of appropriate doses of macro and micronutrients is pre-requisite for maximizing growth and yield of crops. The present study was conducted at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh during the period from October 2022 to February 2023 to assess the effects of different doses of nitrogen (N) and zinc (Zn) on growth and yield of cabbage. The two-factor experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The first factor was nitrogen having four doses of N, such as N0 = 0 kg/ha, N1 = 100 kg/ha, N2 = 150 kg/ha and N3 = 200 kg/ha and the second factor was Zn having four doses, namely Zn0 = 0 kg/ha, Zn1= 1.5 kg/ha, Zn2 = 2.0 kg/ha, Zn3 = 2.5 kg/ha. Significant variations were noted due to the application of different doses of N and Zn fertilizers in respect of all growth and yield traits studied. Application of N at 200 kg/ha contributed the best outcomes on plant height (32.72 cm), number of leaves per plant (47.86), gross yield per hectare (69.99 tons), marketable yield per hectare (45.98 tons) and the lowest yield per hectare (64.52 tons), marketable yield per hectare (38.37 tons) produced from control treatment. The highest level of zinc Zn3 (2.5 kg/ha) produced the best results on plant height (32.30 cm), number of leaves (48.26) per plant, gross yield per hectare (78.02 tons), marketable yield per hectare (61.62 tons) and the lowest gross yield per hectare (59.17 tons), marketable yield per hectare (29.40 tons) produced from control treatment. The maximum doses of nitrogen and zinc (200 kg/ha and 2.5 kg/ha), respectively showed the best performance on plant height (33.32 cm), number of leaves (49.53) per plant, gross yield per hectare (81.15 tons), marketable yield per hectare (65.78 tons) and the lowest gross yield per hectare (55.41 tons) and marketable yield per hectare (27.28 tons) were obtained from the control treatment. The results of this investigation revealed that application of nitrogen (N) and zinc (Zn) enhanced the affects the growth and yield of cabbage.