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通过调查研究,提出了松辽平原玉米带粮食生产中存在的5方面问题。根据最近的一些研究结果,从土壤剖面构型、有效态养分平衡、有机无机复合体组成及土壤酸化趋势加剧等方面揭示了玉米带黑土肥力演化的特点,分析了驱动土壤肥力演化的原因。简要介绍了前期工作中提出的“三三(全)耕作制”对土壤肥力的培育效果,目的是为松辽平原玉米带土壤肥力退化的防治和定向培育提供理论和技术支撑。
Through investigation and study, five problems existed in grain production in the corn belt of Songliao Plain were proposed. According to some recent research results, the characteristics of fertility evolution in maize-black soil are revealed from the aspects of soil profile configuration, available nutrient balance, composition of organic-inorganic complex and aggravation of soil acidification tendency. The reason of driving soil fertility evolution is analyzed. This paper briefly introduced the effect of cultivating soil fertility by “three (whole) tillage system ” proposed in the previous work so as to provide theoretical and technical support for prevention and control of soil fertility degeneration in maize belt in Songliao Plain.