Field experiment was conducted during kharif seasons of 2020 and 2021 at Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India, to evaluate the effect of different rice residue and nitrogen management practices on growth, yield components and yield of kharif rice, which was carried out in a split plot design, having six main plot treatments, consisting of rice residue management options viz., rice residue removal, in-situ burning of rice residues, in-situ incorporation of rice residues, in-situ incorporation of rice residues+ 20 kg N ha-1 as starter, in-situ incorporation of rice residues+ 20 kg N ha-1 + 20 kg P2O5 ha-1 as starter and in-situ incorporation of rice residues+ waste decomposer; and four sub-plot treatments consisting soil test-based N, leaf colour chart based N, chlorophyll meter based N and integrated nitrogen management based N (75% N through inorganic + 25% N through FYM). The results of the experiment revealed highest growth parameters viz., plant height (126.9 cm), tillers m-2 (283.5), LAI (4.53), dry matter (1002.4 g m-2) recorded with in-situ incorporation of rice residues along with 20 kg N ha-1 and 20 kg P2O5 ha-1, whereas, among the N management options, INM based N application resulted in highest plant height at harvest (128.0 cm), tillers m-2 (285.6), LAI at 60 DAT (4.53) and dry weight (966.1 g m-2). Among the growth attributing parameters, the highest number of panicles m-2 (271) was recorded with in-situ incorporation of rice residues along with 20 kg N ha-1, whereas, the highest grains panicle-1 (125.0) and 1000-grain weight (23.64 g) were with in-situ incorporation of rice residues along with 20 kg N ha-1 and 20 kg P2O5 ha-1. Similarly, INM based N management resulted in highest number of panicles m-2 (274) and grains panicle-1 (123.4). The interaction effect of residue and nitrogen management revealed highest grain yield (5833 kg ha-1) and straw yield (7227 kg ha-1) recorded with INM based N application combined with in-situ incorporation of rice residues along with 20 kg N ha-1 and 20 kg P2O5 ha-1. Thus, in-situ incorporation of rice residues along with 20 kg N ha-1 and 20 kg P2O5 ha-1 as starter is an optimum and sustainable approach to enhance the growth and yield of kharif rice.

Kharif rice, Residue incorporation, Nitrogen management, Growth, Yield

It can be concluded from the investigation thatincorporation of rice residuesintegrated with starter application of 20 kg each of N and P2O5 ha-1, along with integrated nitrogen management based nitrogen application in rice can enhance the growth and yield attributes, thereby increasing the grain and straw yield of rice under Odisha condition.

Priyanka Nayak, Rabindra Kumar Paikaray, Bama Shankar Rath, Sanat Kumar Dwibedi, Rajendra Kumar Panda, Shivasankar Acharya and Sabyasachi Sahoo (2022). Integrated Nutrient Management Combined with Starter Applied Residue Incorporation Enhances the Growth and Yield of Transplanted kharif Rice (Oryza sativa L.). Biological Forum – An International Journal, 14(4a): 802-809.