摘要
设施土壤不同于其他露地土壤,由于其内部高温、缺少雨水淋洗、蒸发强烈及施肥等因素的影响,表层土壤盐分不断积累,且以营养盐分为主,致使设施土壤的次生盐渍化、板结、酸化等生态问题日益突出,常引起各种作物的生理障碍。而水分则是影响上述变化较为活跃的因素之一,故设施土壤水分的作用则显得尤为重要。它作为其他溶质运移的载体,不仅影响其水量平衡和盐分积累的过程,同时还决定着土壤退化和农业面源污染进程。因此,本文在大量分析国内外研究的基础上,从土壤水-盐运移理论、露地土壤水-盐运移、设施水-盐运移的研究方面出发,客观地评价了该领域研究状况,并提出了该领域研究存在的问题和展望。
The greenhouse soil is different from uncovered soils. Because of its inner high temperature, little exposure to rainwater leaching, intensive evaporation, and fertilization, salts, dominantly nutrient salts, accumulate steadily in the top soil, thus leading to secondary salinization, compactness, acidification, and some other ecological problems in the soil, which in turn trigger a variety of physiological barriers in the plant. Moisture content, however, is one of the factors stimulating the above change most, especially in greenhouse soil. As a carrier for other solutes, moisture not only affects the process of water balancing and salinity accumulating but also determines the course of soil degradation and agriculture non-point pollution. So, based on the analysis of studies at home and abroad, the status of the research in this field was evaluated objectively, starting from the researches on theory of soil water-salt movement in open fields and in greenhouses, and problems and outlook of the study was discussed.
出处
《土壤》
CAS
CSCD
北大核心
2008年第3期367-371,共5页
Soils
基金
四川省科技厅应用基础项目
四川省教育厅重点项目资助。
关键词
设施土壤
露地土壤
水-盐运移
Greenhouse soil, Uncovered soil, Soil water and salt movement
