油菜与紫云英混作系统的密度效应研究

Effect of Plant Density of Mixcropping System between Rape and Milk Vetch

油菜和紫云英混作,在相同的土壤肥力环境条件下进行试验,研究油菜和紫云英混种的7个不同用种量(即混作密度)对油菜植株干物质积累、分枝特性以及产量结构的影响。结果表明:以油菜2·1kg/hm2,紫云英6·75kg/hm2混作散播为较适宜的混作种植密度。在这种组合密度下既可以获得较高的油菜产量和紫云英产量,还能为后茬作物增产提供较高的土壤肥力,为实现持续增产打下良好的基础。

Dry matter, branch character and yield components of rape were studied with seven levels of plant densities of mix-cropping system of rape with milk vetch. The results indicated that higher yield of rape and milk vetch could be formed with the appropriate mix-cropping density of 2. 1 kg/hm^2 of rape seeds weight and 6.75 kg/hm^2 of milk vetch seeds weight. At the same time,the mix-cropping density helped to improve fertilizer condition for latter crop and formed a good foundation for crop production.