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地膜覆盖作物农田光温效应研究 预览 被引量:64

Light temperature effect of farm land coving with film
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摘要 试验研究地膜覆盖作物农田光温效应结果表明,夏季作物旺长期(棉花开花~吐絮期、玉米抽雄穗~乳熟期、大豆开花~结英期)地膜覆盖作物枝叶茂盛,白天所截留的太阳总辐射量多,作物中下部光照强度小于对照地,且地膜覆盖作物农田土壤温度低于对照地,其中白天地面最高温度降温较明显,棉花、玉米与大豆农田土壤温度比对照分别降低3.1℃、2.7℃和2.5℃,其光温效应可有效减轻夏季高温对作物的危害而利于增产. The dropping effect of soil temperature by film covering on fields is studied in this paper. The results show that the crop's growing and flourishing stage (from blooming to boll opening of cotton, from tassel appearance to milky of maize, and from flowering to podding of soybean) is in the summer. Because under the film, the crop's branches and leaves are so flourishing and thick they can absorb more sun light, but the mid down part of the crop has less light intensity than the counterpart without film covering. Meanwhile the temperature of the soil surface with film covering is lower than the surface with no film covering. In this circumstance the degree of dropping temperature in the cotton, maize and soybean field is 3 1℃, 2 7℃ and 2 5℃. The dropping soil temperature effect with film covering can reduce the damage of high temperature to crop validly in the summer. Therefore it can increase the production.
作者 王有宁 王荣堂 董秀荣 WANG You Ning, WANG Rong Tang, DONG Xiu Rong(College of Agronomy, Yangtze University, Jingzhou 434025)
机构地区 长江大学农学院
出处 《中国生态农业学报》 CAS CSCD 2004年第3期 134-136,共3页 Chinese Journal of Eco-Agriculture
基金 湖北省教育厅科技攻关项目
关键词 地膜覆盖 作物 农田 光温效应 Film covering cultivation, Crop, Light temperature effect
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