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以黄土丘陵沟壑区河洛图(治理流域)和万盛隆(对照流域)两个小流域为研究对象,通过测定其土壤含水率、土壤容重、土壤养分、输沙模数和径流模数等指标,进而对比分析水土保持措施蓄水保土效益,研究结果可为该区水土保持工作提供技术指导。研究表明:河洛图小流域的土壤含水率、土壤孔隙度、土壤粒径和土壤容重等指标均优于万盛隆小流域;万盛隆小流域表层(0~20cm)土壤有机质、全氮、全磷、全钾、速效钾含量分别比河洛图低20.1%,36.3%,18.6%,15.2%,39.7%,速效磷含量不足河洛图的50%;万盛隆小流域的径流模数均比河洛图小流域大,部分年限达到其1.5倍,输沙模数平均为河洛图的151%;工程措施与植物措施综合配置是实现水土保持蓄水保土效益最大化的必然选择。
Taking two small watersheds, Heluotu (governance watershed) and Wanshenglong (Control watershed), in the hilly and gully regions of the Loess Plateau as research objects, soil water content, soil bulk density, soil nutrient, sediment transport modulus and runoff modulus Indicators, and then comparative analysis of water and soil conservation measures of soil and water conservation benefits, the results of the study can provide technical guidance for soil and water conservation work in the area. The results showed that the index of soil water content, soil porosity, soil particle size and bulk density of Hellowut small watershed were better than that of Wanshenglong small watershed. The contents of soil organic matter and total nitrogen , Total phosphorus, total potassium and available potassium were 20.1%, 36.3%, 18.6%, 15.2% and 39.7% lower than that of Heduotu, respectively. The available phosphorus content was less than 50% The number is larger than the Heluotu small watershed, some of the years reach 1.5 times, and the average sediment transport modulus is 151% of the Heluo map. The comprehensive allocation of engineering measures and plant measures is the inevitable to maximize the benefits of soil and water conservation and water and soil conservation select.