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首页> 外文期刊>Indian Journal of Weed Science >Effect of Pyrozosulfuron-ethyl on Weeds and Productivity of Transplanted Rice during Rainy Season
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Effect of Pyrozosulfuron-ethyl on Weeds and Productivity of Transplanted Rice during Rainy Season

机译：吡咯磺隆对雨季移栽水稻杂草和生产力的影响

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摘要

Uncontrolled weeds caused 31% reduction in grain yield of rice. Pyrozosulfuronethyl at 20, 25 or 30 g ha~(-1) was as effective as butachlor at 1250 g ha~(-1) but superior to hand weeding and rotary paddy weeder in reducing weed growth and increasing grain yield of rice. The yield obtained from hand weeding was comparable to rotary weeder. Rice is the major crop of Assam cultivated in an area of 2.4 m ha. The productivity of the crop is often limited by heavy weed infestation due to alternate wettingand drying conditions prevailed under rainfed conditions. The weed flora under transplanted conditions is very much diverse and consists of grasses, sedges and broad-leaved weeds causing yield reduction upto 76% (Singh et al., 2004). Although a number ofpre-emergence herbicides like butachlor, pretilachlor and anilofos provide effective control of grassy weeds, but due to continuous use of such herbicides, a shift in weed flora from grassy to non-grassy and annual sedges is being observed. Therefore, evaluation of new herbicides for control of wide spectrum of weed flora is imperative. In cognizance of the above facts, the present study was undertaken.
机译：不加控制的杂草使水稻的谷粒产量降低了31％。 20、25或30 g ha〜（-1）的吡咯磺磺隆乙基与1250 g ha〜（-1）的丁草胺一样有效，但在减少杂草生长和增加水稻籽粒产量方面优于手工除草和旋转水稻除草剂。从手工除草获得的产量与旋转除草机相当。水稻是阿萨姆邦的主要农作物，种植面积为240万公顷。由于在雨养条件下普遍存在交替的湿润和干燥条件，农作物的生产力通常受到严重的杂草侵扰的限制。移栽条件下的杂草植物种类繁多，由草，莎草和阔叶杂草组成，导致减产高达76％（Singh等，2004）。尽管许多除草前除草剂（如丁草胺，丙草胺和网纹草）可以有效控制草类杂草，但是由于此类除草剂的连续使用，人们观察到杂草菌丛从草类变为非草类和一年生莎草。因此，评估用于控制杂草菌群广谱的新型除草剂势在必行。鉴于上述事实，进行了本研究。

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