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研究侵蚀与产量之间的关系应具备以下两个条件:(1)必须选择一块适宜的耕地,在可行的农业管理条件下测量侵蚀量。(2)必须测量所有可能与加剧侵蚀有关的因素。该研究以土壤流失量与剩余土壤中~(137)Cs含量的关系为依据,在相同的管理条件下估算以前的土壤侵蚀量平均值。这种方法排除了与非常规测量侵蚀量的关系,并且在很大程度上扩大了其适用范围。这份研究报告综合分析了麦地和谷地上壤中NO_3~-、HPO_4~(2-)、K~+、有机质含量、pH值、田间持水量、生育期、土层厚度和土壤侵蚀估算值之间的线性回归关系。该研究指出,在一定条件下侵蚀对生产率的永久性影响为——单位面积上每年流失量常用对数值的0.35%。
There are two conditions for studying the relationship between erosion and crop yield: (1) An appropriate cropland must be selected to measure erosion under feasible agricultural management conditions. (2) All factors that may be associated with aggravating erosion must be measured. Based on the relationship between the amount of soil loss and the content of 137 Cs in the remaining soil, the study estimated the average value of previous soil erosion under the same management conditions. This method precludes the relationship with unconventionally measured erosion and greatly expands its applicability. This research report comprehensively analyzed the NO_3 ~ -, HPO_4 ~ (2 -), K ~ +, organic matter content, pH value, field water capacity, growth period, soil thickness and soil erosion in the wheat field and valley soil Between the linear regression relationship. The study indicates that under certain conditions, the permanent impact of erosion on productivity is 0.35% of the common logarithm of annual loss per unit area.