Effect of Organic Manures and Inorganic Phosphorus on Growthand Yield of Rice

摘要

A field experiment was conducted on Phosphorus dynamics in relation to nutrient management in rice- blackgram cropping sequence at Agricultural College Farm, Bapatla. The results revealed that drymatter production, grain yield and straw yield of ricewere significantly higher with the application of 100% RDNK in combination with Dhaincha @ 1 Ot ha" 1 and it was on par with that of application of RDNK along with sunhemp @10t ha~(-1). However the lowest grain and straw yields were recorded in RDNK alone during both the years of the study. Among the P levels, the treatment P5 (120 kg P_2O_5 ha~(-1)) recorded significantly higher dry matter, grain and straw yield and it was on par with P4 (90 kg P20, ha1) and P3 (60 kg P_2O_5 ha~(-1)) while the lowest was recorded in P_2 (0 kg P_2O_5 ha~(-1)).