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生物全降解地膜的降解过程及其对玉米生长的影响
引用本文:乔海军,黄高宝,冯福学,王利立.生物全降解地膜的降解过程及其对玉米生长的影响[J].甘肃农业大学学报,2008,43(5).
作者姓名:乔海军  黄高宝  冯福学  王利立
作者单位:1. 甘肃农业大学理学院,甘肃,兰州,730070;甘肃农业大学农学院,甘肃,兰州,730070
2. 甘肃农业大学农学院,甘肃,兰州,730070
摘    要:生物全降解地膜可以有效解决白色污染问题,试验研究了生物全降解地膜的降解过程及其对玉米生长的影响.结果表明:生物全降解地膜的降解过程由破孔出现开始,然后逐渐变大并出现裂口,到作物收获时,暴露在地表的地膜大量破碎成小块;扫描电子显微镜(SEM)观察表明:田间降解170 d后,生物全降解降解地膜表面开始出现大小不等的孔洞;生物全降解地膜在玉米生长前期保温、保水的效果显著,到中后期增温作用不明显;覆盖生物全降解地膜具有极显著增产效果,与普通地膜之间差异不显著.

关 键 词:生物全降解地膜  玉米  田间降解

Degradation and its effect on corn growth of biodegradable mulch film
QIAO Hai-jun,HUANG Gao-bao,FENG Fu-xue,WANG Li-li.Degradation and its effect on corn growth of biodegradable mulch film[J].Journal of Gansu Agricultural University,2008,43(5).
Authors:QIAO Hai-jun  HUANG Gao-bao  FENG Fu-xue  WANG Li-li
Abstract:The application of the biodegradable mulch films was proved to be an efficient way to solve the plastic pollution in environment.This experiment mainly focused on the degradation of biodegradable mulch films and its effect on corn growth.The results showed that the degradation of biodegradable mulch films started with small holes,then the holes became bigger,and finally broken down to a lot of pieces at crop harvest stage.Observation of SEM revealed that the surface of biodegradable mulch films had obvious flaw at this time.Biodegradable mulch films had obvious effect on soil temperature and soil water conservation at early stage of corn growth,but its effect on raising soil temperature weakened at the middle and later stages of corn growth.The effect of covering degradable mulch films on corn yields was significant,but there was no obvious difference compared to that of ordinary film.
Keywords:biodegradable mulch film  corn  degradation in field
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