中文摘要：

试验在可降解地膜（B）、普通地膜（C）和未覆膜（ok）3种处理种植方式下进行，探讨可降解地膜对大田土壤含水量、土层地温、玉米农艺性状及产量等指标的影响。两年试验结果表明，可降解地膜在抽雄期之前已达到7级（50％地面无肉眼可见地膜）降解程度；三叶期至抽雄期B和C保水效果明显。且播前至三叶期在O～20cm土层B与C具有同等保水效果，随降解速率加快，效果递减；B和C对5月份0～10cm土层的增温效果最为明显．且表现为B〉C；B和C与ck相比均能提高玉米株高、穗位高、收获指数，加快生育进程。最终B和C分别能平均有效增产15．09％和16．63％、每667m2增收173．54元和196．58元，但可降解膜较普通地膜既省工省时，并可降低环境污染。

英文摘要：

The experiment was carried out by three treatments of degradable films （B）,kind of ordinary films （C）,and none-films （ck）,and discussed the effect of degradable films on temperature and moisture of soil, yield and agronomical characters. The two years results are as follows, degradable films has reached the level 7 （50% ground is not visible to the naked eye film） degradation speed before tasseling stage; B and C had obvious effect on soil moisture conservation from 3 leaf stage to tasseling stage, and had equivalent effect on soil moisture conservation from Before sowing stage to 3 leaf stage for 0-20cm soil layer, however, with the degradation rate of acceleration, the effect was diminishing; B and C had obvious effect on raising temperature for 0-10cm soil layer in May, and showd B 〉 C;Compared with ck, B and C improved maize plant height, ear height and harvest index, and speeded up the development process. In the end, B and C can effectively increased by an average of 15.09% and 16.63%,173.54￥and 196.58￥ per mu, but Compared with the ordinary films ,the degradable films saved workers and time, and reduced the pollution of the environment.