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在大田条件下系统地比较了大豆全生育期玉米茬原垄卡种大豆与大豆连作两种耕作方式下,叶面积、株高、干物质积累及产量上的差异。结果表明:由于玉米秸秆的存在,原垄卡种处理在大豆苗期生长缓慢,其叶面积、株高、干物质积累量较大豆连作处理低6.76%、27.78%、16%。随着后期原垄卡种处理大豆生长迅速,二者之间的差距逐渐缩小,鼓粒期原垄卡种处理叶面积、干物质积累量超过大豆连作处理、二者株高相同。至成熟期原垄卡种处理的干物质积累量较大豆连作处理高7.6%,前者较后者增产9%。
Under field conditions, the differences of leaf area, plant height, dry matter accumulation and yield between the two cultivars with the same crop of soybean and soybean were studied systematically. The results showed that due to the existence of corn stalk, the original ridge seed treatment slowed down at soybean seedling stage, and the accumulation of leaf area, plant height and dry matter was 6.76%, 27.78% and 16% lower than that of soybean continuous cropping. With the rapid growth of soybean in the late stage, the gap between them narrowed gradually. The leaf area and the dry matter accumulation of the original ridge seedling in drum stage were higher than that of continuous cropping with soybean. The dry matter accumulation of the original ridge-maturing species was 7.6% higher than that of the soybean continuous-processing and the former was 9% more than the latter.