文献类型：期刊文献

中文题名：典型石漠化地区不同植被类型地表水土流失特征研究

英文题名：Study on Characteristics of Runoff and Nutrition Loss Between Different Vegetation Land in Typical Karst Rock Desertification Zone

作者：李生[1] 任华东[1] 姚小华[1] 张守攻[2] 杨实[3] 兰应秋[3] 农美东[3]

第一作者：李生

机构：[1]中国林业科学研究院亚热带林业研究所,国家林业局亚热带林木培育重点开放性实验室,浙江富阳311400;[2]中国林业科学研究院,北京100091;[3]广西壮族自治区凌云县林业局,广西凌云533100

年份：2009

期号：2

起止页码：1-6

中文期刊名：水土保持学报

外文期刊名：Journal of Soil and Water Conservation

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：科技部科技基础性工作专项项目(2005DIB3J146);国家林业局林业科技支撑项目(林计批字2006-3);中国林科院中央级公益性科研院所基本科研业务费专项资金(CAFYBB2007033);国家科技支撑项目(2006BAD03A0303)

语种：中文

中文关键词：石漠化;植被类型;地表径流;养分流失

外文关键词：karst rock desertification; vegetation type; runoff; nutrition loss

分类号：S715.3

摘要：在典型喀斯特石漠化地区广西凌云县设置径流小区,通过对不同植被类型地表径流及养分流失观测与分析,结果表明,喀斯特石漠化地区,在降雨历时短且大雨以上强度的降雨条件下存在地表径流,单次径流系数平均值在1.5%-13.8%之间,年平均径流量为75.86 mm。地表径流量与每次降雨量之间具有显著的相关性,其相关系数在0.8967-0.9475之间。不同植被类型间年径流量差异极显著,农耕地产生的年径流量最大,达122.75 mm,灌木林地产生的年径流量最小,达54.08 mm。径流中泥沙浓度整体表现出春秋季浓度高,夏季浓度低的趋势。不同植被类型间的侵蚀模数差异极显著,侵蚀模数平均达到45.88 t/km^2.a,属微度侵蚀。耕作加剧了土壤扰动,对土壤流失有显著的影响,农耕地土壤侵蚀模数（98.91 t/km^2.a）最大,灌木林地土壤流失量（5.42t/km^2.a）最小。径流中全N浓度呈现出随时间而下降的趋势,全P、全K浓度呈现出春秋季高、夏季低的趋势。不同植被类型间流失全N、全P、全K总量差异极显著,植被能够有效减少地表径流及养分的损失,在该地区应该促进植被恢复。
Based on the observation of runoff and nutrition loss between different plant coverage land in typical karst rock desertification zone（KRD）, Lingyun city in Guangxi Zhuang Autonomous Region. The results showed that： in these areas, under the brevity but the heavy rain strength rainfall, runoff could occur in KSD zone, the runoff coefficient of every time changed between 1.5%-13.8%, and the mean runoff was 75.86 mm. There were prominence correlations between runoff and rainfall. There were prominence difference between different vegetation types（p〈0.01）, the runoff of farmland （122. 75 mm） was the highest, while, the lowest in shrubland （54.08 mm）. The sediment concentrations of runoff in spring and autumn were higher than in summer. The difference of soil erosion modulus between different vegetation types was prominence（p 〈0.01）, and the mean erosion modulus was 45.88 t/km^2. a, belonged to slight erosion. Farming aggravated disturbance of soil, and effected the earth erosion observably. Soil erosion modulus was maximal in farmland and minimal in shrubland. The total N concentrations declined with time, while, total P and total K were same to the sediment concentrations change. The difference of gross of total N, P, K between different coverage land was prominence（p〈0. 01）, the vegetations could reduce the runoff and nutrition loss in these areas, and vegetations restoration should be promoted.