RESUMO
Aim: Foliar nutrition is aimed to eliminate the problems of fixation and immobilization of nutrients. Hence, foliar application of plant growth hormones is being recognized as a significant way of fertilizing modern agriculture, especially under rainfed conditions. Growth regulating substances or growth regulators are known to influence a wide array of physiological parameters like alteration of plant architecture, assimilate partitioning, promotion of photosynthesis, uptake of nutrients (mineral ions) and enhancing metabolism.Study Design: The experiment was laid out in Randomized complete block design with three replications.Place and Duration of Study: A field experiment was conducted in medium black to deep black soil with clay loam texture at Agricultural Research Station, Bheemarayanagudi, Yadgir district during kharif season of 2022.Methodology: The experiment consisted of eleven treatments viz., T1: Control (water spray), T2: Pulse magic @ 10 g l-1 at flower initiation, T3: Nitrobenzene @ 500 ppm at flower initiation, T4: Urea @ 2 % spray at flower initiation, T5: DAP @ 2 % spray at flower initiation, T6: N: P: K (19:19:19) @ 2 % spray at flower initiation, T7: Boron @ 0.25 % spray at flower initiation, T8: Urea @ 2 % + salicylic acid @ 75 ppm spray at flower initiation, T9: DAP @ 2 % + salicylic acid @ 75 ppm spray at flower initiation, T10: N: P: K (19:19:19) @ 2 % + salicylic acid @ 75 ppm spray at flower initiation and T11: Boron @ 0.25 % + salicylic acid @ 75 ppm spray at flower initiation. Results: Foliar application of DAP @ 2 % + salicylic acid @ 75 ppm at flower initiation was found beneficial for growth and yield of greengram along with higher net returns and benefit-cost ratio (BC ratio). Alternately, foliar application of N:P:K (19:19:19) @ 2 % + salicylic acid @ 75 ppm at flower initiation stage or foliar application of pulse magic @ 10 g l-1 at flower initiation stage can be recommended for achieving higher net returns from greengram cultivation.Conclusion: Foliar application of nutrients and plant growth hormones would reduce the burden on soil application of fertilizers through urea and DAP for greengram cultivation. Thereby, cost incurred on fertilizers could be reduced and net returns could be increased. Foliar application of DAP @ 2 % + salicylic acid @ 75 ppm at flower initiation was found beneficial for growth and yield of greengram.
RESUMO
Aims: Foliar nutrition is aimed to eliminate the problems of fixation and immobilization of nutrients. Hence, foliar nutrition is being recognized as a significant way of fertilizing modern agriculture, especially under rainfed conditions. Nano fertilizers because of smaller size and higher surface area are efficient as compared to conventional and produce better results when used in combined form.Study Design: The experiment was laid out in Randomized complete block design with three replications.Place and Duration of Study: A field experiment was conducted in medium black soils at Agricultural Research Station, Hagari, during Kharif 2022.Methodology: There were ten treatment combinations, consisting of different doses of RDF (50 % RNP, 75 % RNP and 100 % RDF and absolute control) with different doses of nano urea and Dap sprayed at 30 and 45 DAS for CSH-16 hybrid of sorghum.Results: Application of 75% RNP as basal + nano urea & DAP spray @ 1.5 ml l-1 each at 30 and 45 DAS recorded significantly higher number of leaves, leaf area and leaf area index. It also produced higher earhead length (35.9 cm), number of grains earhead-1 (2207), grain weight (57 g plant-1) and test weight (29.3 g 1000 grains-1). Nutrient content and uptake also showed higher values for the same treatment along with the nutrient use efficiency indices. Whereas, significant reduction in soil microbes was noticed by the application of treatment.Conclusion: Combined application of conventional and nano fertilizers helped to increase growth, growth attributes like number of leaves, leaf area, leaf area index, yield attributes, nutrient content, nutrient uptake and nutrient use efficiency of sorghum.
RESUMO
Aims: Foliar nutrition is aimed to eliminate the problems of fixation and immobilization of nutrients. Hence, foliar nutrition is being recognized as a significant way of fertilizing modern agriculture, especially under rainfed conditions. Liquid organic manures are the concoctions of micro and macronutrients that also contain vitamins, amino acids, growth-promoting substances, and beneficial microbes. Study Design: The experiment was laid out in a split plot design with three replications. Place and Duration of Study: A field experiment was conducted in medium black soils at Regional Agricultural Research Station, Vijayapur, during Rabi, 2020-21. Methodology: There were fifteen treatment combinations, consisting of five organic sources (vermiwash @ 10%, cowurine @ 10%, jeevamrutha @ 25%, bio digester filtrate @ 25% and urea @ 2%) in main plots and three stage of application (pre flowering, pod initiation and pre flowering + pod initiation) in sub plots for JG-11 variety of chickpea. Results: Foliar application of jeevamrutha @ 25% both at pre flowering and at pod initiation stages recorded significantly greater dry matter accumulation in leaves, stem and reproductive parts, higher SPAD values, number of pods plant-1 (46.5), grain weight plant-1 (9.45 g), harvest index (2198 kg ha-1). Soil dehydrogenase activity, protein content and protein yield parameters also showed higher values for the same treatment along with the major nutrient uptake. A significant reduction in the observation of pest load of chickpeas at pod development stage was noticed by the application of treatment. Conclusion: Foliar application of liquid organic manures, either jeevamrutha @ 25% or cow urine @ 10% both at pre-flowering and at pod initiation stages helped to increase growth, growth attributes like dry matter accumulation, SPAD values, yield attributes, protein content, dehydrogenase activity, major nutrient uptake and reduction of pest load in chickpea.