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确定标准小区在土壤侵蚀预报中具有重要意义 ,也是进行土壤侵蚀规律研究的必要基础。文中根据我国的自然环境条件、土壤侵蚀特征、农业生产特点 ,通过分析土壤侵蚀发生的地形特点、已有资料的坡度变化范围 ,以及土壤流失量估算中的误差变化规律 ,提出并论证了我国土壤侵蚀研究中的标准小区应选定 1 5°坡度、 2 0 m坡长、 5m宽的清耕休闲地。小区每年按传统方法准备成苗床 ,并按当地农作习惯适时中耕 ,保证没有明显的杂草生长。
It is of great significance to determine the standard plot in the prediction of soil erosion and is also the necessary basis for the study of the law of soil erosion. According to the characteristics of natural environment, soil erosion and agricultural production in our country, by analyzing the topographic characteristics of soil erosion, the range of slope of existing data and the variation of error in estimation of soil loss, The standard plot in the erosion study should be selected for clearing land with a slope of 15 °, slope length of 20 m and width of 5 m. Community every year according to the traditional method of preparing seedbed, and timely farming practices according to local farming, to ensure that no significant weed growth.