在绿豆鼓粒期，选取晴朗无云天气，对不同覆膜方式处理下的绿豆进行光合指标采集，结合成熟期与绿豆产量有关的表型性状，研究不同地膜覆盖方式对绿豆产量的影响。结果表明：地膜覆盖能增温、保湿、保持养分、增加光效。用140 cm渗水地膜覆盖处理的绿豆持绿度高，叶片叶绿素含量明显高于露地平播（对照），净光合速率高，干物质积累时间长，绿豆产量有明显增加。140 cm渗水地膜覆盖绿豆产量2691 kg/hm2，较露地平播和窄幅地膜处理分别增加了20.9%和6.3%。%In order to study the effect of plastic film mulching dealt with different way on mung bean yield, the author chose the cloudless fine weather to measure the photosynthetic indexes in the seed filling period of mung bean, and measured the phenotypic traits relating to mung bean yield in the mature period. The results showed that the plastic film mulching could increase soil temperature, retain moisture, keep nutrient, and increase photosynthetic efficiency, the mung bean had higher green degree, net photosynthetic rate, and its chorophyll content was significantly higher than no-covered (contrast), so its photosynthetic matter accumulation time was long, the yield had obviously increased. The mung bean yield was 2691 kg/hm2 with 140 cm water-osmosis plastic membrane covered, which increased by 20.9%to no-covered and 6.3%to narrow membrane treatment.
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