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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。
In order to solve the problem of weeds in alfalfa seedling stage in hilly area of southern Jiangsu, we started with the protection of sowing and found suitable accompanying crops in five varieties of perennial ryegrass, annual ryegrass, rye and triticale. Through the determination of yield, plant height, weed rate and other indicators, we screened Zhongxin 830 Triticale, and Ganoden No. 1 ryegrass was suitable for the companion crops of alfalfa sowing, and the highest survival rate of the two alfalfa (15kg / hm2) + Zhongxin 830 triticale (150kg / hm2) and sowing of alfalfa (18kg / hm2) + Zhongxin 830 triticale (250kg / hm2) 30cm. The experiment also showed that the sowing mode, alfalfa sowing capacity is not proportional to its competitiveness.