Singh, RohitashavYadav, KamalkantYadav, Kamalkant2023-04-102023-04-102022-092022-09https://krishikosh.egranth.ac.in/handle/1/5810196188Field experiments entitled “Response of wheat (Triticum aestivum L.) to tillage and nutrient management practices under rice-wheat system in Himalayan tarai” were conducted in the D-2 block of Norman E. Borlaug Crop Research Centre, G. B. Pant University of Agriculture and Technology, Pantnagar (Uttarakhand) during the rabi season of 2020-21 and 2021-22. The objectives of investigation were to study the effect of tillage and nutrient management practices on the growth and productivity of wheat, nutritional and quality parameters, energy consumption and economics of different treatments. The experiment was laid out in a split-plot design with three replications. Treatments were consisted of three tillage practices viz. zero, reduced and conventional tillage and whereas, in sub-plots, five nutrient management practices viz. RDF (N 120:P2O5 60:K2O 40 kg/ha), RDF + FYM @5 t/ha, RDF + ZnSO4 @25 kg/ha, 75% RDF + FYM @10 t/ha and 75% RDF + FYM @5 t/ha) + ZnSO4 @12.5 kg/ha. The investigation revealed that tillage did not significantly influence growth parameters, yield attributing characters and yield but economics was significantly influenced in both years of study. Zero tillage recorded comparatively higher grain yield over reduced and conventional tillage practices. Zero tillage recorded 10.25 % and 11.52% higher net returns than conventional tillage, in 2020-21 and 2021- 22, respectively. The lowest energy competition was recorded under zero tillage as well as significantly higher net energy and energy efficiency was achieved by zero tillage over reduced and conventional tillage in both years. There was a significant impact of nutrient management practices on various parameters. Among the nutrient management practices, NM5 treatment recorded significant response to all the growth parameters at various growth stages which resulted in higher yield attributes (spike/m2, fertile spikelets/spike and grain weight/spike), N, P, K and Zn, total uptake and net return compared to NM1, NM2 and NM3. Significantly higher grain and biological yield, nutrient uptake in grain, gross monitory return, net energy return and energy efficiency in NM5 (75% RDF + FYM @5 t/ha + ZnSO4 @12.5 kg/ha) treatment compared with NM1 and NM2 but at par with NM4 and NM3 treatments. The increment in grain yield in NM5 i.e. 75% RDF + FYM @5 t/ha + ZnSO4 @12.5 kg/ha were (16.7 & 15.8%), (14.2 & 13.6%), (10.1 & 9.3%) and (6.7 & 6.2%), per cent more over NM1 (RDF 120:60:40), NM2 (RDF + ZnSO4 @25 kg/ha), NM3 (RDF + FYM @5 t/ha) and NM4 (75% RDF + FYM @10 t/ha) in 2020-21 and 2021-22, respectively. Therefore, in tarai regions, zero tillage plus 75% RDF + FYM + 12.50 kg/ha of ZnSO4 is a better option for achieving a higher wheat yield.Field experiments entitled “Response of wheat (Triticum aestivum L.) to tillage and nutrient management practices under rice-wheat system in Himalayan tarai” were conducted in the D-2 block of Norman E. Borlaug Crop Research Centre, G. B. Pant University of Agriculture and Technology, Pantnagar (Uttarakhand) during the rabi season of 2020-21 and 2021-22. The objectives of investigation were to study the effect of tillage and nutrient management practices on the growth and productivity of wheat, nutritional and quality parameters, energy consumption and economics of different treatments. The experiment was laid out in a split-plot design with three replications. Treatments were consisted of three tillage practices viz. zero, reduced and conventional tillage and whereas, in sub-plots, five nutrient management practices viz. RDF (N 120:P2O5 60:K2O 40 kg/ha), RDF + FYM @5 t/ha, RDF + ZnSO4 @25 kg/ha, 75% RDF + FYM @10 t/ha and 75% RDF + FYM @5 t/ha) + ZnSO4 @12.5 kg/ha. The investigation revealed that tillage did not significantly influence growth parameters, yield attributing characters and yield but economics was significantly influenced in both years of study. Zero tillage recorded comparatively higher grain yield over reduced and conventional tillage practices. Zero tillage recorded 10.25 % and 11.52% higher net returns than conventional tillage, in 2020-21 and 2021- 22, respectively. The lowest energy competition was recorded under zero tillage as well as significantly higher net energy and energy efficiency was achieved by zero tillage over reduced and conventional tillage in both years. There was a significant impact of nutrient management practices on various parameters. Among the nutrient management practices, NM5 treatment recorded significant response to all the growth parameters at various growth stages which resulted in higher yield attributes (spike/m2, fertile spikelets/spike and grain weight/spike), N, P, K and Zn, total uptake and net return compared to NM1, NM2 and NM3. Significantly higher grain and biological yield, nutrient uptake in grain, gross monitory return, net energy return and energy efficiency in NM5 (75% RDF + FYM @5 t/ha + ZnSO4 @12.5 kg/ha) treatment compared with NM1 and NM2 but at par with NM4 and NM3 treatments. The increment in grain yield in NM5 i.e. 75% RDF + FYM @5 t/ha + ZnSO4 @12.5 kg/ha were (16.7 & 15.8%), (14.2 & 13.6%), (10.1 & 9.3%) and (6.7 & 6.2%), per cent more over NM1 (RDF 120:60:40), NM2 (RDF + ZnSO4 @25 kg/ha), NM3 (RDF + FYM @5 t/ha) and NM4 (75% RDF + FYM @10 t/ha) in 2020-21 and 2021-22, respectively. Therefore, in tarai regions, zero tillage plus 75% RDF + FYM + 12.50 kg/ha of ZnSO4 is a better option for achieving a higher wheat yield.EnglishThesis