Nitrogen management practices for improving yield and nitrogen use efficiency in rice (Oryza sativa)

Rahul Kumar Verma; Adesh Singh; Mohammad Hasanain; Md Basit Raza; Rajiv Kumar Singh

doi:10.56093/ijas.v90i7.105615

Authors

Rahul Kumar Verma Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, Uttar Pradesh 250 110, India
Adesh Singh Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, Uttar Pradesh 250 110, India
Mohammad Hasanain Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, Uttar Pradesh 250 110, India
Md Basit Raza Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, Uttar Pradesh 250 110, India
Rajiv Kumar Singh Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, Uttar Pradesh 250 110, India

https://doi.org/10.56093/ijas.v90i7.105615

Keywords:

Chlorophyll meter, LCC, Nitrogen use efficiency, Rice, SPAD

Abstract

A field experiment was conducted on rice (Oryza sativa L.) during kharif season of 2017 at Crop Research Centre of Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U P) to assess the nitrogen (N) use efficiency and performance of rice under different nitrogen management practice. Management practices included N levels with modified application through leaf colour chart (LCC) and chlorophyll meter (SPAD). The study shows that treatment T6 (LCC (50 kg N/ha) with basal N @50 kg/ha)gave highest yield and N-use efficiency which were comparable to T₉ (SPAD (67 kg N/ha) with basal N @33 kg/ha). The total biological yield (grain + straw) of rice was significantly higher in T₆ (114.4 q/ha) as compared to control (66.9 q/ha). The SPAD and LCC-treated plot showed higher N-use efficiency in rice over fixed-scheduling N treatments. Highest N content(1.88% (grain) and 0.76% (straw)) and uptake (128.14 kg/ha) was recorded in T₆ treatmentin all stages (tillering, PI and harvest) which was comparable with T₈ and T₉ treatment.

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