Author(s):

Babita Joshi, Sudershan Mishra, Prinsa, DK Singh and SK Guru

Abstract: Sowing time and fertilization for rice cultivation is very important for growth and optimum yield. Due to some or the other factors like poor weather condition, delayed monsoon, late harvest of previous crop, farmers have to go for late sown condition which has negative impact on growth and yield of rice resulting in yield reductions. Optimizing the dose and an understanding of the nutrient utilization capacity under late sown condition will help to improve the productivity of rice. Keeping in view the aforesaid facts, a field study was conducted in rainy season of 2017 and 2018 at GBPUA&T, Pantnagar, India to assess effect of differential nutrient management on the growth and yield of six rice genotypes viz. PR-113, PD-22, HKR-47, PD-24, NDR-359 and PD-19 under late sown conditions. The treatments included 50% RDF (60:30:20 kg NPK ha^-1), 100% RDF (120:60:40 kg NPK ha^-1), 150% RDF (180:90:60 kg NPK ha^-1) and 50%RDF+ FYM (5 t ha^-1). Incremental doses of N, P and K (150% RDF) significantly improved the growth parameters such as height, number of tillers, number of panicles per square meter, 1000-grain weight as well as grain and biological yield. When the dose was reduced to 50% RDF the growth and yield parameters decreased significantly. Application of FYM along with 50% RDF could not result in yield levels comparable to 100% RDF.

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