上备田河小流域不同林分类型固土保水能力

发布时间：2018-05-30 19:12

本文选题：固土保水 + 林分类型　；参考：《江西农业大学学报》2017年03期

【摘要】：以江西上犹县上备田河小流域连续8年的监测数据为基础,分析比较针阔混交林、湿地松林、杉木林、马尾松林和宜林荒山荒地(对照)5种不同林分类型的固土保水能力及其与降雨量、降雨强度、径流量和含沙量等因子的关系。结果表明:(1)各类型的径流量与土壤侵蚀量均呈逐年下降趋势,其针阔混交林年平均下降率最大,分别为7.4%和22.5%,变化最小的均为宜林荒山荒地。(2)年均径流量与年均土壤侵蚀量均表现为宜林荒山荒地马尾松林杉木林湿地松林针阔混交林;针阔混交林与宜林荒山荒地的径流量差异显著(P0.05);针阔混交林、湿地松林、杉木林、马尾松林与宜林荒山荒地的土壤侵蚀量均存在显著性差异(P0.05),针阔混交林与湿地松林、杉木林、马尾松林的土壤侵蚀量差异显著(P0.05)。(3)不同类型的土壤侵蚀量与降雨量、降雨强度均呈显著或极显著相关,降雨量、降雨强度对宜林荒山荒地土壤侵蚀量的影响程度最大,对针阔混交林的影响最小。
[Abstract]:Based on the monitoring data of Shangbei River small watershed in Shangyou County, Jiangxi Province for 8 consecutive years, this paper analyzed and compared the coniferous and broad-leaved mixed forest, Pinus elliottii forest and Chinese fir forest. The soil retention capacity of five different stand types in Pinus massoniana forest and barren mountain wasteland in Yilin and its relationship with rainfall intensity runoff and sediment content were studied. The results showed that the runoff and soil erosion showed a decreasing trend year by year, and the annual average decline rate of coniferous and broad-leaved mixed forest was the highest. The average annual runoff and soil erosion amount were respectively 7.4% and 22.5%, respectively, and the smallest change was in the barren mountain wasteland of Yilin. 2) the annual runoff and the average annual soil erosion amount were both coniferous and broad-leaved mixed forests of Pinus massoniana and Pinus massoniana. There were significant differences in soil erosion between coniferous and broad-leaved mixed forest and barren mountain wasteland in Yilin, coniferous and broad-leaved mixed forest, Pinus elliottii forest, Chinese fir forest, Pinus massoniana forest and barren mountain wasteland in Yilin forest, there were significant differences in soil erosion between coniferous and broad-leaved mixed forest and Pinus elliottii forest, Chinese fir forest, coniferous and broad-leaved mixed forest, Pinus elliottii forest and Chinese fir forest. The soil erosion amount of Pinus massoniana forest was significantly different (P0.05N. 3) different types of soil erosion amount and rainfall intensity were significant or extremely significant correlation, rainfall, rainfall intensity has the greatest impact on the amount of soil erosion in barren mountains and wasteland in Yilin. The effect on coniferous and broad-leaved mixed forest was the least.
【作者单位】：江西农业大学林学院;
【基金】：国家自然科学基金项目(31360181、30860229) 江西省林业科技创新专项资金项目(201607)~~
【分类号】：S714.7

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