六盘山海子流域土壤水分动态及土壤水源涵养能力研究

发布时间：2018-05-07 00:39

本文选题：海子流域 + 土壤水源涵养能力的影响因素　；参考：《宁夏大学》2017年硕士论文

【摘要】：海子流域水源涵养林的建设对宁夏六盘山地区的生态、社会和经济的可持续发展非常重要,但在近些年来,由于人们长期的滥砍乱伐使流域水土流失严重、抗蚀性差;植被稀疏、生长不良,水源涵养能力下降,流域生态环境逐渐恶化。严重制约当地经济社会的发展。论文以油松林、落叶松林等水源涵养林作为试验对象,采用野外试验与室内试验相结合的方法,以测定土壤的水源涵养能力为目标。分析研究了不同条件下同种植被与不同种植被林地土壤的水源涵养能力,主要研究结论如下:(1)土壤表层(0-20cm)的平均容重值最小,其土壤性能明显好于中、下层土壤;天然次生落叶松林表层性能好于中下层。林地田间持水量的变化范围为20.82%-34.14%,总孔隙度位于36.60%-58.30%之间;阴坡林地的平均土壤稳渗率大于阳坡植被;人工种植树林的土壤中层渗透性大于表层土壤;林地的平均土壤蓄水容量高达2772.16 t/hm2。(2)海子流域水源区森林的水源涵养能力较强,刺槐林、油松林、落叶松林涵养水源的能力比较好。
[Abstract]:The construction of water conservation forest in Haizi Basin is very important for the sustainable development of ecology, society and economy in Liupanshan area of Ningxia. However, in recent years, the soil and water loss is serious and the resistance to erosion is poor due to people's long period of deforestation. The vegetation is sparse, the growth is poor, the water conservation ability is decreased, and the ecological environment of the watershed is deteriorating gradually. Seriously restrict the development of local economy and society. In this paper, water conservation forest of Pinus tabulaeformis and Larix gmelinii forest was used as the experimental object. The purpose of this paper was to measure the water conservation capacity of soil by combining field test with indoor experiment. The water conservation capacity of the same vegetation and soil planted under different conditions was analyzed and studied. The main conclusions were as follows: 1) the average bulk density of the topsoil was the smallest, and the soil performance was obviously better than that of the middle and lower soil. The surface layer performance of natural secondary larch forest is better than that of middle and lower layer. The range of field water holding capacity of forestland is 20.82-34.144.The total porosity of woodland is between 36.60- 58.30%, the average infiltration rate of woodland on shady slope is higher than that of vegetation on sunny slope, the permeability of soil middle layer of planted forest is higher than that of surface soil. The average soil water storage capacity of woodland was as high as 2772.16 t / hm ~ 2 路m ~ (2) ~ (2) the water conservation capacity of forest in Haizi watershed was stronger than that in Robinia pseudoacacia forest, Pinus tabulaeformis forest and larch forest.
【学位授予单位】：宁夏大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S714

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