【摘要】 探讨四川省小麦田免耕不覆盖稻草、免耕覆盖稻草、翻耕3种不同耕作方式下杂草发生规律以及小麦生长差异,结果表明,免耕处理可减少杂草的发生,免耕加5 000 kg/hm2稻草覆盖量可有效控制小麦田杂草的发生;免耕不覆盖稻草和翻耕处理在小麦播后2周左右杂草有1个出苗高峰,因此应在小麦播种后第2周对杂草进行化学防除。3种不同耕作方式下对小麦生长发育影响较大的杂草为禾本科杂草和繁缕;覆盖稻草可在一定程度上促进小麦出苗后的生长,产量也较未覆盖处理和翻耕处理高。更多还原

【Abstract】 The effects of three tillage methods on dynamics of weed emergence and wheat yield were studied under field conditions.Absence of tillage reduced the occurrence of weeds and in combination with 5 000 kg/hm2 of straw mulch effective weed control was achieved.Weed emergence peaked at two weeks after sowing both in no-till and tilled fields,which represents the suitable time for chemical weed control.Gramineae and chickweed had the greatest negative impact on wheat growth.Wheat grew much better in fields with straw mulch,and the yield was also much higher than with other treatments.更多还原