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试验表明各色地膜覆盖对土壤的温湿度都有明显的提高.温度提高的程度因地膜颜色、天气、土层的深浅有不同。 杭州早春,各色地膜覆盖的土壤温度,比对照高1—4℃。地膜覆盖的土壤O_2含量正常,雨后测定,各色地膜覆盖处理的在19.6—19.8％之间,对照为18.8％。各色地膜覆盖的土壤容重都比对照的小,平均为1.08,对照为1.21。 各色地膜对甜椒、茄子等果菜生长都有促进作用,其中无色、绿色、乳白色膜尤为显著。各色地膜覆盖的产量平均比对照高40～50％。 试验明确了几种不同颜色地膜的透射光谱与热辐射的透射率。
Tests showed that all kinds of plastic film mulching on soil temperature and humidity have significantly improved the degree of temperature increase due to the film color, the weather, the depth of the soil are different. Hangzhou early spring, colored soil mulching temperature, higher than the control 1-4 ℃. The content of O_2 in the soil covered by mulch was normal, and after rain, the coverage of mulched mulch was between 19.6-19.8% and the control was 18.8%. The soil bulk density covered by the mulch film was smaller than the control, with an average of 1.08 and a control of 1.21. Colored film on the sweet pepper, eggplant and other fruits and vegetables have a role in promoting the growth, including colorless, green, milky white film is particularly significant. The average yield of colored film mulching was 40 ~ 50% higher than that of the control. Test clear several different colors of film transmission spectrum and heat radiation transmittance.