Effect of Humic Acid Application on Productivity of Summer Black Gram and Its Residual Effect on Rice

Abstract

newline The present study entitled Effect of Humic Acid Application on Productivity of Summer Black gram and its Residual effect on Rice was conducted at the Research Farm, Water Management Research Centre, SKUAST- J, Chatha during summer and kharif seasons of 2022 and 2023. The experiment was laid out in Factorial Randomized Block Design with three factors and was replicated thrice. Twenty treatment combinations, included five Humic acid treatments (Control, Soil Application of Humic acid at 2.5kg/ha and 5kg/ha with two sources namely market ready and FYM, two PSB applications (With and without PSB) and two levels of phosphorus nutrition (100% Recommended N:100% Recommended P- 15:40 kg/ha and 100% Recommended N: 75% Recommended P- 15:30 kg/ha) was applied to black gram crop and residual effect was evaluated in succeeding rice crop. newlineAmong humic acid treatments, treatment H2 [Soil Application of Humic acid at 5kg/ha (Market ready)] recorded significantly superior values for growth parameters, yield attributes, yield, microbial as well soil parameters which was at par with H4 [Soil Application of Humic acid at 5kg/ha (FYM)], Economically H4 recorded maximum net return and B:C ratio than H2. In case of PSB application and phosphorus nutrition treatment, treatment P1 (With PSB) and N1 [100% Recommended N:100% Recommended P (15:40 kg/ha)] observed significantly superior value for growth parameters, yield attributes, yield, microbial, soil parameters and economics, respectively. Residual effect of humic acid treatments on succeeding rice crop showed non-significant higher results. newline Based on two years of investigation, it is concluded that treatment H2 recorded the highest growth, yield and increase in soil parameters in both black gram and succeeding rice crop but economics point of view, treatment H4 was more economical in black gram crop. Likewise, treatment P1 and N1 also recorded highest growth, yield, soil parameters and economics in both black gram and succeeding rice crop. newline