Vol. 9, Issue 8 (2020)

Author(s):
M Venkata Lakshmi, CH Pulla Rao, PVN Prasad, P Prasuna Rani and Y Ashoka rani

Abstract:
A field experiment was conducted during Kharif 2016-17 and 2017-18 on loamy sands of soil at Agricultural College Farm, Bapatla to study the effect of In-situ green manuring, Bio-fertilizer (PSB) and inorganic fertilizer (SSP) on yield attributes and yield of Rice. The treatments consisted of four sources of phosphorus as main plots S_1: Inorganic fertilizer phosphorus through SSP, S_2: Green manuring in-situ with dhaincha @ 25 kg seed ha^-1, S_3: Biofertilizer (PSB) @ 750 ml ha^-1, S_4: Green manuring in-situ with dhaincha @ 25 kg seed ha^-1 + Biofertilizer (PSB) @ 750 ml ha^-1 and three levels of phosphorus L_1: 50% recommended dose of P_, L_2: 100% recommended dose of P and L_3: 150% recommended dose of P. In kharif rice was laid out in split plot design with three replications. Results of the experiment showed that application of in-situ green manuring + PSB along with inorganic phosphorus through SSP showed superior performance in terms of yield attributes like panicle length,panicle weight, test weight, number of panicles m^-2, total number of grains panicle^-1, number of filled grains panicle^-1 and yield and over alone application of inorganic fertilizer phosphorus through SSP. Among the levels of phosphorus 150 % RDP showed higher yield attributes like panicle length, panicle weight, test weight, number of panicles m^-2, total number of grains panicle^-1 and number of filled grains panicle^-1 and yield and over 50 % RDP and however it was on par with 100 % RDP.