Effect of weed management practices on weeds, nutrient depletion and yield of rice (Oryza sativa)

M. MEYYAPPAN; C. ILANGO; S. NATARAJAN; A. ANGAYARKANNI

doi:10.59797/ija.v63i4.5677

Authors

M. MEYYAPPAN Faculty of Agriculture, Annamalai University, Annamalainagar, Tamil Nadu 608 002
C. ILANGO Faculty of Agriculture, Annamalai University, Annamalainagar, Tamil Nadu 608 002
S. NATARAJAN Faculty of Agriculture, Annamalai University, Annamalainagar, Tamil Nadu 608 002
A. ANGAYARKANNI Faculty of Agriculture, Annamalai University, Annamalainagar, Tamil Nadu 608 002

DOI:

https://doi.org/10.59797/ija.v63i4.5677

Keywords:

Butachlor, Conoweeding, Grain yield, Weed control efficiency, Weed, Yield parameters

Abstract

Field experiments were conducted during Navarai (rabi) seasons of 2011 and 2012 with ADT-36 rice (Oryza sativa L.) variety to evaluate the effect of weed management practices. Pooled data of the two years revealed that application of butachlor @ 1.5 kg a.i/ha followed by weekly cono-weeding from 21 to 42 days after transplanting (DAT) resulted in least weed count, dry-matter production and nutrient removal which resulted in the highest weed control efficiency, productive tillers/hill, grains/panicle, number of filled grains/panicle and enhanced the grain yield, which was 0.73 and 0.46 t/ha more compared to twice hand weeding and conventional method of butachlor application followed by hand weeding.

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