SUSTAINING SUGARCANE PRODUCTION AND SOIL HEALTH THROUGH INTEGRATION OF DIFFERENT NUTRIENT SOURCES

摘要

Experiment was conducted at Chaudhary Charan Singh Haryana Agricultural University, Regional Research Station, Karnal for three consecutive years (2003-06) on plant crop with the objective to develop eco-friendly nutrient management strategy for sugarcane. The treatment consisted of 100, 75 and 50% of recommended N (150 kg/ha) and P_2O_5 (50 kg/ha) through inorganic fertilizers alone and 25% N through different organic sources I.e. FYM or pressmud or vermicompost with and without bio-fertilizers (Azotobactor & PSB). Application of 100 % NP through inorganic + 25% N through FYM + biofertilizer ( Azotobacter + PSB) produced highest number of tillers, millable canes, cane yield (77.4 t/ha) and sugar yield (8.64 t/ha) and this treatment was at par with that of 75% NP through inorganic + 25% NP through FYM or pressmud + biofertilzer. Highest net returns (Rs. 40959/ha) and benefit cost ratio (1.77) was obtained in treatment where 100% NP through inorganic fertilizers + 25% N through FYM + biofertilizer (Azotobacter + PSB) followed by the treatment where75% NP through inorganic fertilizers + 25% NP through FYM or press mud + biofertilzer and lowest net returns (Rs.31947/ha) and benefit cost ratio (1.62) was recorded where 50% NP through inorganic fertilizers + 25% N through FYM + biofertilizers were applied. The soil pH, EC and available P did not change under different treatments. There was some increase in organic carbon and available K in the soil where 25% N was applied through organic manures (FYM/pressmud).