YAO Jianmin,YIN Haishan,YANG Ruiping.Study on Small Rain Utilization Technique by Water permeability Plastic Film Covering[J].Research of Soil and Water Conservation,2000,7(04):36-38,42.
旱地小雨资源渗水地膜覆盖利用技术研究
- Title:
- Study on Small Rain Utilization Technique by Water permeability Plastic Film Covering
- Keywords:
- small rainfall; water permeability plastic film; dry land
- 分类号:
- S273.1;S275.3
- 摘要:
- 通过对我国半干旱地区小雨量降雨的动态特征、数量特征、时间特征和生产潜力的研究，认为小雨资源有效化是旱地农业的重要增产途径，利用渗水地膜进行的覆盖试验与示范证实了小雨量资源利用的显著增产效果.
- Abstract:
- At present,small rainfall resources cannot be effectively used in agricultural production.Investigated data showed that there was 100~150 mm and 70% frequency of small rainfall(≤10mm/d) in annual precipitation in semi drought area in Shanxi province of China.According to the results calculated by grain production potentiality of rainfall,the maize yield of 7 500 kg/hm2 would be possible in 246mm rainfall,thus the increase of 3 555 kg/hm2 maize yield in 100mm annual small rainfall would also be possible.In order to exploit small rain resources,the water permeability plastic film has been invented,and it has been used to field covering test in dry land for maize,cotton,wheat,tobacco,etc.The test results in 1997 in Xi County of Shanxi province showed that there was 38.3% increase in maize yield than conventional membrane and 103% increase than no cover.Water permeability plastic film can improve rainfall penetration into soil vertically,modify maximum soil temperature,and ventilate soil,while it also can increase soil temperature and block evaporation.
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备注/Memo
收稿日期:2000-10-13
基金项目:国家“九五”科技攻关项目黄土高原水土流失区农业综合发展技术研究第6专题——晋西残塬区高产型农业综合发展研究（96-004-05-06）的内容.