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该文通过室内人工模拟降雨试验,研究了地表施加玉米茎秆汁液对降雨产流产沙强度的影响,旨在探索玉米茎秆汁液是否可以作为土壤改良剂来减少产流产沙强度。试验设计了2种玉米茎秆汁液的施加量(400和800 g)、4种施加浓度(10%、25%、50%和75%)和4种降雨强度(50、25、75、100 mm/h)。结果表明,各施加浓度和施加量的玉米茎秆汁液都能够减少降雨产流产沙强度,且相同条件下的产沙强度减小程度大于产流强度减小程度。当玉米茎秆汁液的施加量为400 g时,随着施加浓度从10%增加至25%、50%和75%,减流百分比分别为31.243%、31.685%、34.595%和39.475%,减沙百分比分别为23.167%、41.993%、37.918%和64.606%;当玉米茎秆汁液的施加量为800 g时,随着施加浓度从10%增加至25%、50%、75%,减流百分比分别为37.583%、56.433%、63.170%和76.360%,减沙百分比分别为48.214%、77.219%、88.572%和95.539%。当施加量和降雨强度相同时,产流产沙强度与施加浓度之间呈显著的指数函数递减关系,产沙强度随降雨强度的变化呈显著的幂函数递增关系。当施加量为400 g时,各施加浓度下的产流强度与降雨强度之间呈显著的线性函数递增关系,当施加量为800 g时,各施加浓度下的产流强度随降雨强度呈显著的指数函数递增关系。研究为水力侵蚀的防治提供了新思路,为水蚀荒漠化的防治提供了新方法。
This paper studied the effect of corn stalk juice on runoff and runoff and sediment yield by indoor artificial simulated rainfall test to explore whether corn stalk juice can be used as soil improver to reduce runoff and sediment yield. Two corn stover juices (400 and 800 g), four application concentrations (10%, 25%, 50% and 75%) and four rainfall intensities (50, 25, 75 and 100 mm / h). The results showed that corn stover juice with different concentration and application rate could reduce the runoff and sediment yield of rainfall, and the decrease of sediment yield under the same conditions was larger than that of runoff intensity. When the amount of corn stalk juice applied was 400 g, the percentage of flow reduction was 31.243%, 31.685%, 34.595% and 39.475% respectively as the applied concentration increased from 10% to 25%, 50% and 75% The percentage of flow reduction was 23.167%, 41.993%, 37.918% and 64.606%, respectively. When the application amount of corn stalk juice was 800 g, the percentage of flow reduction was increased with the increase of application concentration from 10% to 25%, 50% and 75% 37.483%, 56.433%, 63.170% and 76.360%, respectively. The percentages of sediment reduction were 48.214%, 77.219%, 88.572% and 95.539% respectively. When the application rate and rainfall intensity are the same, the relationship between runoff and sediment yield and applied concentration has a significant exponential function, and the sediment yield intensity shows a significant power function increasing trend with the change of rainfall intensity. When the application rate was 400 g, the runoff intensity and rainfall intensity at each application concentration showed a significant linear function increasing trend. When the application rate was 800 g, the runoff intensity at each application concentration was significant with the rainfall intensity The exponential function increases the relationship. The research provides new ideas for the prevention and control of hydraulic erosion and provides a new method for the prevention and control of water erosion.