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覆盖可降解地膜对玉米生长和土壤环境的影响
引用本文:王星,吕家珑,孙本华.覆盖可降解地膜对玉米生长和土壤环境的影响[J].农业环境科学学报,2003,22(4):397-401.
作者姓名:王星  吕家珑  孙本华
作者单位:西北农林科技大学资源环境学院,陕西,杨凌,712100
摘    要:采用3种不同性质的可降解地膜和一种普通地膜覆盖种植玉米,在玉米生长的不同时期测定土壤水分含量、土壤温度、地膜破损程度等,最后,收获玉米并计产。结果表明,地膜覆盖在玉米生育中期保水效果明显,而在生育前期和后期保水效果不明显;在生育中期保温效果不明显,而在生育前期和后期保温效果明显。降解膜和普通膜的保水、保温和增产效果基本相同;各降解膜对玉米生长和土壤环境的影响无差异。3种降解膜的降解速率为:生物降解膜>生-光双降解膜>光降解膜。

关 键 词:覆盖栽培  可降解地膜  玉米  生长发育  土壤环境  影响因素  生物降解膜  光降解膜
文章编号:1672-2043(2003)04-0397-05
修稿时间:2002年9月26日

Effects of Covering Degradable Films on Corn Growth and Soil Environment
Abstract:An experiment was carried out, where grown corn by covering three kinds of degradable films and one kind of ordinary films. Soil moisture, soil temperature and degradable states of films were evaluated, and the corn yields were recorded. The results showed that the film covering had obvious effect on soil water conservation at the middle stage of corn growth, but neither at the earlier, nor later stage was obvious. Film covering had little obvious effect on raising soil temperature at the middle stage of corn growth, but at the earlier and later stages this effect was obvious. Degradable films and ordinary film had same effects on soil water conservation and soil temperature, resulting in increasing corn yields. Degradable film exhibited little differences of effects on soil environments and corn yields. The order of the degradable rates of degradable films was: biodegradable film>bio-photodegradable film>photodegradable film.
Keywords:bio-degradable film  photodegradable film  bio-photodegradable film  corn  soil environment
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