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高寒地区饲用芜菁(莞根)采用厚度为0.006mm的塑料薄膜覆盖后,在5～9月144d的生长期内,土壤0～25cm耕层≥0℃地积温增加753.5℃,平均每日增加5.2℃,0～30cm土壤湿度增加3.56%,土壤有机质、全氮、速效氮和全磷分别增加0.18%、0.03%、0.04%和0.007%。覆膜同时抑制了杂草的滋生,为芜菁生长提供了有利的生境条件,是芜菁获得高产的主要原因。与此同时,覆膜也降低了芜菁微环境中大气的CO2浓度,叶室和叶片温度,改变了光合有效辐射。
In the alpine region, after feeding the turnip with the thickness of 0.006mm, the accumulative temperature of ≥0 ℃ in 0-25cm soil layer increased by 753.5 ℃ in the growing season from May to September of 144d, With the increase of 5.2 ℃, the soil moisture in 0-30 cm increased by 3.56%, and the soil organic matter, total nitrogen, available nitrogen and total phosphorus increased by 0.18%, 0.03%, 0.04% and 0.007% respectively. Film at the same time inhibit the breeding of weeds, growth of turnips provided favorable habitat conditions, is the main reason for turnip high yield. At the same time, the film also reduced atmospheric CO2 concentration in turnip microenvironment, leaf chamber and leaf temperature, changed photosynthetically active radiation.