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[目的]解决重庆地区苜蓿苗期的杂草问题。[方法]选用裸燕麦、皮燕麦2个燕麦类型,通过对株数、株高、产量、杂草率等指标测定分析,从中筛选春播苜蓿伴播作物中能较好控制苜蓿苗期杂草的燕麦类型及其伴播方式。[结果]与参试皮燕麦相比,参试裸燕麦用作苜蓿播种的伴生作物更能有效地抑制苗期杂草生长;重庆地区春播苜蓿适用的伴播处理为苜蓿(15kg/hm2)+裸燕麦(120kg/hm2),40cm行距条播;适宜的燕麦刈割时期在5月11日～5月21日间;适宜的苜蓿刈割时期在燕麦刈割10d后。[结论]应用燕麦伴播能有效地控制春播紫花苜蓿苗期杂草。
[Objective] The research aimed to solve the weed problem of alfalfa seedling in Chongqing. [Method] Two oat types of naked oat and oat skin were selected. According to the determination of plant number, plant height, yield and weed rate, the oats with better control of alfalfa seedling weeds Type and its accompanying broadcast mode. [Result] Compared with the experimental skin oats, the experimental naked oats used as the companion crops of alfalfa sowing was more effective in inhibiting weeds growth at seedling stage. The companion sowing treatment of alfalfa sowed in spring in Chongqing was alfalfa (15kg / hm2) + Naked oats (120kg / hm2) and 40cm row spacing were planted. Suitable oat mowing period was from May 11 to May 21, and the suitable period for cutting alfalfa was 10 days after the oats were mowed. [Conclusion] The application of oat with companion could effectively control the weeds of spring sowed alfalfa seedlings.