The weed control effects and influences of four kinds of soil-applied herbicides, Pretilachlor, Butachlor, Saturn, and Mefenacet, on N, P, K and moisture in transplanting field of paddy rice were studied. It showed that 50% Pretiachlor EW, 60% Butachlor EW, and 10% Saturn Granule had better effects on E. Crwgalli, Cdifformis and M. Vaginalis; 50% Mefenacet WP had a good weed control effect on E. Crusgalli and Cdifformis, while it didn't worked for M. Vaginalis. All four kinds of soil-applied herbicides could control weed well. With the increasing of weed control effects, the light penetra-tion rate was markedly improved and the weeds absorption of nutrition and moisture was significantly reduced, resulting in prominent effects of yield enhancing.%试验研究了丙草胺、丁草胺、杀草丹和苯噻酰草胺4种土壤处理除草剂防除水稻移栽田主要杂草的效果,及防除后杂草对氮、磷、钾及水分的影响,试验结果表明,50％丙草胺EW、60％丁草胺EW和10％杀草丹颗粒剂对水稻移栽田稗草、鸭舌草和异型莎草均有较好的防除效果,50％苯噻酰草胺WP对稗草和异型莎草有较好的防除效果,但对鸭舌草防除效果较差.4种土壤处理除草剂均能有效的控制水稻移栽田的杂草危害,改善田间光照和水肥条件,减少杂草对田间养分和水分的吸收,从而显著提高水稻产量.
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