【摘要】 为解决苏南丘陵区苜蓿苗期的杂草问题,从保护播种入手,在多年生黑麦草、一年生黑麦草、黑麦、小黑麦四种作物共五个品种中寻找适宜的伴生作物。通过对产量、株高、杂草率等多个指标测定分析,筛选出中新830小黑麦、赣选一号黑麦草适于用作苜蓿播种的伴生作物,同时获得两个苜蓿存活率最高的处理:苜蓿(15kg/hm2)+中新830小黑麦(150kg/hm2)撒播及苜蓿(18 kg/hm2)+中新830小黑麦(250kg/hm2)30cm条播。试验还表明撒播方式下,苜蓿播量与其竞争力不成正比。更多还原

【Abstract】 To solve weed problems for seedling alfalfa in South Jiangsu Hilly Area,companion crops were tried with five varies of four species of crops(perennial ryegrass,annual ryegrass,rye,and triticale).Through measuring and analysising yields,height and weed ratio,triticale Zhongxin 830 and annual ryegrass Ganxuan NO.1 were selected out,which can be used as alfalfa’s companion crops,and two disposals that alfalfa had higher competitive ability were : alfalfa(15kg/hm~2)+Zhongxin830(150kg/hm~2),broadcast sown;and alfalfa(18 kg/hm~2)+ Zhongxin 830(250kg/hm~2),drilled with the row spacing of 30cm. The study also proved that under the mode of broadcast sowing,the competitive ability didn’t increase with alfalfa seeding rates.更多还原