Integrated nutrient management practices on dry matter production, yield and NPK content of transplanted rice

A field investigation was carried out during kharif seasons of 2016 and 2017 at research farm of College of Agriculture, Central Agricultural University, Imphal, to study the influence of integrated nutrient management on dry matter production, yield and NPK content of transplanted rice. The treatments were laid out in a randomized block design and replicated thrice using the rice variety (CAU-R1). Among the different treatments, higher dry matter production and N content in rice were found significantly in T8 (100% RDN from urea + 10 tonnes Azolla ha-1) on 30th, 60th and 90th DAT. At harvest, significantly higher content of N in grain was observed in T10 (75% RDN from urea + 25% RDN from FYM + 10 tonnes Azolla ha-1) while treatments T8 and T10 showed the similar effect in straw N content. However, statistically higher P concentration was recorded in T11 (50% RDN from urea + 50% RDN from FYM + 10 tonnes Azolla ha-1) throughout the growing period and also in grain and straw at harvest time. T12 (25% RDN from urea + 75% RDN from FYM + 10 tonnes Azolla ha-1) noted the highest K concentration in grain followed by T11 while K content in straw was highest in both the treatments T11 andT12. In contrary to P content, the K content recorded in grain was low under different treatments. Critical analysis of the pooled data showed that soil treated with 75% RDN from urea + 25% RDN from FYM + 10 tonnes Azolla ha-1(T10) yielded significantly higher grain and straw yield of rice.