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Impact of Mulch, Cover Crop and Herbicides on Growth, Yield and Nutrient Uptake in Direct Seeded Rice (Oryza sativa L.)

Pratik Sanodiya, Manoj Kumar Singh
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1Department of Agronomy, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh, India.
Cite article:- Sanodiya Pratik, Singh Kumar Manoj (2022). Impact of Mulch, Cover Crop and Herbicides on Growth, Yield and Nutrient Uptake in Direct Seeded Rice (Oryza sativa L.). Agricultural Science Digest. 42(4): 432-437. doi: 10.18805/ag.D-5506.

ABSTRACT

Background: Direct seeded rice is very much prone for weed infestation in eastern Uttar Pradesh. The aim of this trial is to find out appropriate option for improving rice growth and yields besides increasing nutrient uptake.
Methods: A field investigation was conducted during the Kharif season of 2014 and 2015 at Varanasi, Uttar Pradesh. Rice variety MTU-7029 was sown with Sesbania and sunhemp cover crop bispyribac Na 25 g ha-1 + azimsulfuron 30 g ha-1 at 15 DAS and 2, 4 -D 0.5 kg ha-1 at 30 DAS were applied to find out best weed control practice for enhancing growth, yields and nutrient uptake in direct seeded rice.
Result: Sesbania cover crop fb bispyribac 25 g ha-1 + azimsulfuron 30 g ha-1 at 15 DAS markedly improved plant height, dry matter accumulation, leaf area index, chlorophyll content. Consequently, Sesbania cover crop fb bispyribac 25 g ha-1 + azimsulfuron 30 g ha-1 at 15 DAS influenced statistically grain and straw yields. Sesbania cover crop fb bispyribac 25 g ha-1 + azimsulfuron 30 g ha-1 at 15 DAS recorded significantly lower nutrients (NPK and Zn) depletion by weeds and higher nutrients (NPK and Zn) uptake as compared to hand weeding at 15 and 35 DAS in rice.

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