松辽平原玉米带黑土不同耕作制度下的土壤侵蚀特征研究

Study on Characteristics of Soil Erosion of Black Soil in Corn Belt of Songliao Plain

通过田间调查和土壤肥力指标分析,探讨了松辽平原玉米连作黑土在不同的耕作制度下所形成两种不同构型剖面土壤侵蚀特征。结果发现,“平面型”剖面构型比“波浪型”剖面构型的土壤结构优良,土壤物理肥力水平较高;不合理的耕作制度是造成土壤侵蚀的重要原因,而坡地土壤侵蚀又是造成土壤质量退化的主要原因。不同的耕作制度下,土壤的抗侵蚀性有较大的差异,“平面型”剖面的侵蚀率平均为2 88,“波浪型”剖面的侵蚀率平均为3 17。

By field investigation and soil fertility index analysis, soil erosion characteristics of different profile morphological characteristics under continuous cultivation of corn formed under different tillage conditions in Songliao Plain were studied. The results showed that soil construction of “flat type” section is better than that of “wavy type” section. In “flat type” section. Physical fertility of soil is higher; The unreasonable farming system is an important reason that result in soil erosion, and the soil erosion is a main reason that result in soil quality's degradation. There are more differences of the soil anti-erosion in the different farming system: the average rate of “flat type” section is 2.88, and the average rate of “wavy type” section is 3.17.