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本文所提到的土壤环境因子是指对作物生育至关重要的土壤温度、土壤水份、土壤物理性以及土壤氮素养分四个方面的内容。研究薄膜地面复盖后的土壤环境变化是推广这项农业技术的基础工作,自从60年代中期,日本以及欧美一些国家,在开发农业薄膜利用的基础上,加强了这方面的研究工作。近一两年来,随着地面复盖栽培技术在我国的引进利用,国内一些农业单位结合本地区的土壤、气候条件着手了有关方面内容的研究。本课题组从1979年3月至1980年7月在保护地内相继做了上述四个方面的试验观测。
Soil environmental factors mentioned in this paper refer to four aspects of soil temperature, soil moisture, soil physical properties and soil nitrogen nutrient that are important to crop growth. Studying the change of soil environment after the film surface covering is the basic work to popularize this agricultural technology. Since the mid 1960s, Japan and some European and American countries have strengthened their research in this field based on the exploitation of agricultural film. In the past year and a half, with the introduction and utilization of ground cover cultivation techniques in our country, some domestic agricultural units started researching the related aspects with the soil and climatic conditions in the region. The research group from March 1979 to July 1980 in the protected areas have done the above four aspects of experimental observations.