Abstract
A field experiment was conducted during Summer and Kharif seasons of 2007-08 and 2008-09 at Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal, India to study the effect of hand weeding and Pretilachlor 50 EC @ 500 g a.i. ha-1 as pre-emergence on weed management of different varieties of hybrid and high yielding rice. The experiment was laid out in a split-plot design with three replications for both the years. It has been observed that Pretilachlor 50 EC @ 500 g a.i. ha-1 has a significant effect to control complex weed flora both in hybrid and high yielding varieties of rice but hand weeding twice gave the better result as expected. Among the varieties, the hybrid varieties recorded 36% and 32% more grain yield in Summer and Kharif seasons respectively than high yielding varieties (HYV). The high yielding variety 6444 (V2) showed more grain yield during Summer and Kharif seasons than that of the hybrid 6129 (V1), 97158 (V6), and 96110 (V3), respectively. Regarding weed management, hand weeding twice recorded (13% & 36%) higher grain yield during Summer than that of the chemical treatment and unweeded check, and (20% & 42%) during Kharif seasons respectively. Among the interaction, hand weeding combined with all varieties of hybrid rice recorded higher yield in comparison to other treatment combinations.
Highlights
Rice plays one of the most vital roles in food security of the world over millennia
Materials and Methods A field experiment was conducted to study the effect of best weed management practice on different hybrid and high yielding varieties of transplanted rice during Summer and Kharif seasons of two successive years of 2007-08 and 2008-09, respectively at ‘C’ Block Farm of Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, India
Six varieties of hybrid (V1-6129, V2-6444, V3-96110, V4-97304, V5 –94024, and V6 –97158) and two high yielding varieties (HYV) of rice (V7-IET 4786 and V8-IET 4094) as a check were used in the main plot and three weed management practices were in sub-plot
Summary
Rice plays one of the most vital roles in food security of the world over millennia. It is grown around 114 countries across the world and contributing nearly 11 percent of the world’s cultivated land (Rai, 2006). China and India are leading growers and consumers of rice and they account for 50% of the rice grown and consumed. It can grow in diverse soil and climatic conditions and so it is very popular among the farmers but in India, still its productivity level is not up to the mark. Due to the increasing world’s population from 7.21 billion in 2015 to 8.27 billion in 2030, the increase of rice demand will be from 680 million tonnes to 771 million tonnes in 2030 (Badawi, 2004)
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