不同配置模式毛竹林水土流失特征

发布时间：2018-01-26 17:58

本文关键词： 农业工程水土流失径流小区毛竹林　出处：《水土保持研究》2017年03期 　论文类型：期刊论文

【摘要】：选取安吉县毛竹纯林、毛竹—杨桐混交林、毛竹—杨桐—萱草混交林作为研究对象,对大气降雨和3种林分中的地表径流量、土壤流失量、养分流失量(总氮和总磷)进行了研究。结果表明:(1)安吉县6—10月份降雨量呈明显波动趋势,降雨量为6.0~106.0mm。根据降雨强度划分等级安吉县25场降雨划分为小雨、中雨、大雨和暴雨。(2)安吉县暴雨对应的径流系数相对较高,其次为大雨。3种林分中毛竹纯林径流系数最大,毛竹—杨桐—萱草混交林最小。(3)3种林分径流系数、土壤流失量和养分流失量变化趋势基本一致,均呈明显波动趋势。6月和8月径流系数、土壤流失量和养分流失量相对较大。(4)降雨量与地表径流回归方程和地表径流与土壤流失量回归方程均为线性回归方程,说明降雨量与地表径流、地表径流与土壤流失量均呈线性关系。
[Abstract]:The pure bamboo forest, bamboo-caryophyllum mixed forest, bamboo-caryophyllum hemerocallis mixed forest in Anji County were selected as the research objects. The surface runoff and soil loss of the three stands were studied. The nutrient loss (total nitrogen and total phosphorus) was studied. The results showed that the rainfall in June and October in Anji County fluctuated obviously. The rainfall is 6.0 ~ 106.0mm. according to the grade of rainfall intensity, 25 rainfall in Anji County are divided into light rain, moderate rain, heavy rain and rainstorm.) the runoff coefficient of heavy rain in Anji county is relatively high. Secondly, the runoff coefficient of pure Phyllostachys pubescens stands was the largest, the runoff coefficient of the three stands was the lowest. The variation trend of soil loss and nutrient loss was basically the same. The runoff coefficient of June and August is obvious. The regression equations between rainfall and surface runoff and between surface runoff and soil loss are linear regression equations, indicating that rainfall and surface runoff are linear regression equations. There is a linear relationship between surface runoff and soil loss.
【作者单位】：浙江省水利河口研究院;浙江广川工程咨询有限公司;
【基金】：浙江省科技计划项目“生态浙江建设小流域水土流失防控技术研究”(2015F50060)
【分类号】：S714.7
【正文快照】： 毛竹是我国南方重要的竹林资源,其中浙江是毛竹分布最丰富的省份之一[1]。浙江省毛竹资源量大,分布广,根据浙江省森林资源及其生态功能价值公告,20个县市毛竹林面积在1万hm2以上,又以安吉县毛竹林面积最大,立竹量最多[2]。安吉县毛竹林面积占全县森林总面积的37.8%[3]。自20世

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