Influence of Nitrogen Levels and Weed Management Practices on Nutrient Content, Uptake and Grain Quality of Wetland Rice (Oryza sativa L.)
Year: 2024
Type: article
Abstract: Nutrients and weeds are two important factors that influence the productivity of the rice. Azolla and BGA have ability to replace N fertilizers by 25% of the total crop requirement through biological N fixation. The Azolla covert may significantly inhibit weed infestation without harming the rice yield. A 2-year field experiment was conducted to study the influence of nitrogen (N) levels and weed management practices (WMP) on nutrient content, uptake, and grain quality of wetland rice during Kharif 2018 and 2019. The experiment was laid out in a split plot design having five nitrogen levels viz. control, 60, 90 &120 kg N ha -1 through inorganic source and 60 kg N ha -1 as farmyard manure (FYM) in main plots and four weed management practices viz. Azolla (2 t ha -1 ), blue-green algae (BGA), two-hand weeding (2HW), and weedy in sub plots replicated thrice. Results indicated that the use of more N (120 kg N ha -1 ) recorded the highest N content in rice grain and straw while phosphorous (P) & potassium (K) content was noticed higher with the use of 60 kg N ha -1 as FYM. Higher nitrogen application (120 kg N ha -1 ) improved NPK uptake by grain and straw. Dual cropping of Azolla @ 2 t ha -1 leads to maximum nutrient (N, P, K) content and uptake by rice grain and straw. Quality parameters viz. kernel length & breadth before and after cooking were significantly influenced by N levels and maximum values were noted with the use of 120 kg N ha -1 . The WMP fails to exhibit any significant effect on the quality parameters of rice viz. kernel length & breadth before and after cooking. Length: breadth ratio before and after cooking, elongation ratio, and expansion ratio were also noted unaffected by N levels and WMP during the study period.
Authors: Tikendra Kumar Yadav, S.P. Singh, Shiv Poojan Yadav, KVK,Maharajganj, ANDUAT, Kumarganj, Ayodhya, Uttar Pradesh, India., Sadhan Kumari
Language: English
Subfield: Soil Science
Domain: Life Sciences
Open Access status: bronze
OpenAlex ID: W4406427811