为探寻玉米-大豆间作体系中鲜食大豆生长发育及产量的形成规律,本文选用鲜食大豆品种浙鲜豆4号和四川地区常采青食用的本地普通大豆品种川豆8号,在玉豆间作和大豆单作条件下,对大豆形态建成、干物质积累过程、产量形成等进行了研究。结果表明:间作下大豆株高、底荚高显著增大,茎粗减小,叶面积指数(LAI)、比叶重(SLW)在鼓粒期前有所降低;各器官干物质的阶段积累、日积累量也较净作降低,浙鲜豆4号前期各营养器官物质积累时间短,积累量少,后期虽然荚积累速率较快,但由于基础物质少,生殖生长时间短,导致最终产量不高;间作下的分枝数、主茎有效节数、单株荚数、单株粒数、百荚鲜重、百荚粒重、单株产量显著降低,百粒鲜重差异不显著,经济系数增大;相对川豆8号,浙鲜豆4号在形态和产量上受间作的影响较小,但除百粒鲜重外,其余产量构成指标均极显著低于川豆8号。可见,在玉豆间套作体系中,为了提高鲜食大豆产量,应选择株高较低,茎粗较大,有效分枝数、单株荚数多、对间作环境适应性强的大豆品种。
In order to know the influence of intercropping on growth and development and yield formation of vegetable soybean,vegetable soybean Zhe 4 and Chuan 8 were selected to plant under maize-soybean intercropping and soybean monoculture. The morphogenesis,dry matter accumulation and yield formation were studied. The results showed that the stem diameter,phase accumulation,date accumulation,branches,main stem effective nods,pods per plant,seeds per plant,fresh 100-pod weight,100-pod seeds weight,fresh 100-seed weight,yield per plant of the intercropping soybean were lower than monoculture soybean. Except for fresh 100-seed weight the differences between two planting patterns of other indexes were significant. Leaf area index( LAI),specific leaf weight( SLW) were lower before full seed stage. The plant height,bottom pod height and economic efficient were higher. As Zhe 4 the accumulation time of the vegetative organs was short and the matter accumulation was little at the earlier stage so that the yield was low though the pod accumulate quickly. Compared to Chuan 8,Zhe 4 changed less on morphology and yield under intercropping. All of the yield traits of the Zhe 4 were lower than those of Chuan 8 except for fresh 100-seed weight. It's obviously to see under maize-soybean intercropping in order to plant vegetable soybean with good quality and high yield we should choose those varieties with low plant height,big stem diameter,more effective branches and pods per plant and strong adaptability to intercropping environment.