凯掌喀斯特小流域不同植被措施的减沙功能
发布时间：2019-07-09 08:59
【摘要】：贵州位于中国西南喀斯特地区的中心,是全国水土流失最为严重的省份之一,而喀斯特地区生态环境脆弱,土层浅薄,极容易发生水土流失。为了揭示喀斯特小流域不同植被措施减沙功能,在贵州省平坝县典型喀斯特区凯掌小流域野外径流小区定位监测的基础上,根据小流域2010-2012年4个坡面径流小区的定位观测资料,采用单因素完全随机设计方法研究在水土保持林(柏树Cupressus funebris),经济林(茶树Camellia sinensis),坡耕地(玉米Zea mays)和撂荒草地4种不同植被措施下径流小区的产沙特性,探索不同植被措施下径流小区产沙量的差异。结果表明:水土保持林与经济林差异不显著(P=0.7540.05),与坡耕地差异显著(P=0.0220.05),与撂荒地差异显著(P=0.0080.05);经济林与坡耕地差异显著(P=0.0460.05),撂荒地差异显著(P=0.0030.05);坡耕地与撂荒地差异显著(P=0.0000.05)。年平均产沙量最少为撂荒地29.57 g·a~(-1);最多为坡耕地1 436.59 g·a~(-1);水土保持林与经济林相差不大,分别为789.12 g·a~(-1)和876.55 g·a~(-1)。不同措施减沙功能排序为:撂荒地水土保持林经济林坡耕地。在喀斯特地区,撂荒地减沙功能最好,而坡耕地是水土流失严重。
[Abstract]:Guizhou, located in the center of Karst area in southwest China, is one of the most serious provinces of soil and water loss in China, and the ecological environment of Karst area is fragile, the soil layer is shallow, and soil erosion is very easy to occur. In order to reveal the sediment reduction function of different vegetation measures in Karst small watershed, based on the location and monitoring of field runoff plot in Kazhou small watershed in Pingba County, Guizhou Province, and according to the positioning and observation data of four slope runoff plots in small watershed from 2010 to 2012, the single factor completely random design method was used to study the soil and water conservation forest (Cupressus funebris), economic forest) (tea tree Camellia sinensis),). The sediment yield characteristics of runoff plot under four different vegetation measures of Zea mays) and abandoned grassland were studied, and the difference of sediment yield of runoff plot under different vegetation measures was explored. The results showed that there was no significant difference between soil and water conservation forest and economic forest (P 鈮，
本文编号：2512040
[Abstract]:Guizhou, located in the center of Karst area in southwest China, is one of the most serious provinces of soil and water loss in China, and the ecological environment of Karst area is fragile, the soil layer is shallow, and soil erosion is very easy to occur. In order to reveal the sediment reduction function of different vegetation measures in Karst small watershed, based on the location and monitoring of field runoff plot in Kazhou small watershed in Pingba County, Guizhou Province, and according to the positioning and observation data of four slope runoff plots in small watershed from 2010 to 2012, the single factor completely random design method was used to study the soil and water conservation forest (Cupressus funebris), economic forest) (tea tree Camellia sinensis),). The sediment yield characteristics of runoff plot under four different vegetation measures of Zea mays) and abandoned grassland were studied, and the difference of sediment yield of runoff plot under different vegetation measures was explored. The results showed that there was no significant difference between soil and water conservation forest and economic forest (P 鈮，
本文编号：2512040
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