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研究了在岭东南高寒区高水肥条件下大豆覆膜种植对土壤温度以及作物产量的影响。试验数据表明覆膜后在大豆苗期、分枝期增温效果显著,花期后由于大豆植株生长叶面积指数的增高增温幅度渐低。覆膜的增温效应与气温表现出一定的正相关性并随着土层深度的增加而递减。大豆覆膜种植比传统种植大豆植株生长旺盛,同一品种平均干物质累积相对增加15 g左右,增产1800 kg hm-2。由于覆膜种植有效提高了大豆生育期土壤积温,使得在高寒区也可选择生育期相对较长的大豆品种并可提早播种以达到增产丰收的效果。
The effects of soybean filming on soil temperature and crop yield were studied under high water and fertilizer conditions in the southeastern part of the mountain. The experimental data showed that the effect of warming in the branching stage was obvious after the film was mulched at the soybean seedling stage, and the temperature increasing range was lower after the flowering due to the increase of the leaf area index of the soybean plant. The warming effect of the film shows a positive correlation with the temperature and decreases with the depth of the soil. Soybean lamina grew more vigorously than the traditional soybean plantation, and the average dry matter accumulation of the same variety increased about 15 g and increased the yield by 1800 kg hm-2. As the film planting effectively raised the soil temperature during the growth of soybean, making the selection of relatively long growing soybean varieties in the alpine region and early sowing in order to achieve the effect of yield increase.