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采用径流小区法研究等高梯地、荒草地、侵蚀地三种类型水土肥流失及其变化特点。结果表明，各季节径流量均为侵蚀地＞荒草地＞等高梯地，而冲刷量则是侵蚀地＞等高梯地＞荒草地；等高梯地全量（有机质、全氮、全磷）、速效养分（氮、磷、钾）流失总量分别比荒草地高５０．１０％和１．０３倍，却较侵蚀地减少３４．５０％和１４．２０％；养分流失具有明显的富集性，其富集总规律为速效磷＞速效钾＞速效氮＞全磷＞全氮＞有机质，且有侵蚀地＞荒草地＞等高梯地的趋势。等高梯地年侵蚀模数为５５０～６５０ｔ／ｋｍ２·ａ，明显低于丘陵红壤区允许侵蚀模数，而不致形成显著的人为加速侵蚀，构建等高梯地是丘陵红壤资源利用持续发展的一条有效措施。
Using runoff plot method to study the loss and change characteristics of three kinds of water and soil fertilizers such as contour land, waste grassland and erosion land. The results showed that all the runoffs in all seasons were erosion land> grassland> contour land, and the erosion amount was erosion land> contour land> grassland; the total amount of all the landings (organic matter, total nitrogen and total phosphorus) , Total available nutrients (nitrogen, phosphorus and potassium) loss were 50.10% and 1.03 times higher than that of wasteland, but decreased by 34.50% and 14.20% respectively compared with eroded grassland. Nutrient loss had obvious enrichment The general rule of enrichment is the trend of available phosphorus> available potassium> available nitrogen> total phosphorus> total nitrogen> organic matter, and erosion land> wasteland> contour. The annual erosion modulus of the high ground is 550 ~ 650t / km2 · a, which is obviously lower than the allowable erosion modulus of red soil region in the hilly area without causing significant man-made accelerated erosion. The construction of contour land is the continuous development of resource utilization of hilly red soil An effective measure.