| 林地开垦后坡面侵蚀过程与土壤养分流失的研究 |
| |
| 引用本文： | 郑粉莉 张成娥. 林地开垦后坡面侵蚀过程与土壤养分流失的研究[J]. 水土保持学报, 2002, 16(1): 44-46 |
| |
| 作者姓名： | 郑粉莉 张成娥 |
| |
| 作者单位： | 中国科学院水利部水土保持研究所,西北农林科技大学,陕西,杨陵,712100 |
| |
| 基金项目： | 国家自然科学基金项目"黄土坡面土壤侵蚀与养分流失过程响应关系及其机理研究"(49871050)资助 |
| |
| 摘 要： | 林地被人为开垦破坏后 ,加速侵蚀是导致坡面土壤养分流失的根本原因。坡面土壤养分流失的空间分布与坡面侵蚀方式和侵蚀强度的空间分布相一致 ,浅沟沟槽是坡面土壤养分流失最严重的部位。土壤养分流失在开垦初期非常迅速 ,开垦耕种 5 a后 ,土壤养分含量可减少 5 0 %。土壤剖面中 A层的流失是土壤养分流失的标志。
|
| 关 键 词： | 人为加速侵蚀 土壤养分流失 子午岭次生林区 |
| 文章编号： | 1009-2242(2002)01-0044-03 |
| 修稿时间： | 2001-10-18 |
Study on Sloping Soil Erosion Processes and Soil Nutrient Loss After Forest Removal |
| |
| ZHANG Fen li,ZHANG Cheng e. Study on Sloping Soil Erosion Processes and Soil Nutrient Loss After Forest Removal[J]. Journal of Soil and Water Conservation, 2002, 16(1): 44-46 |
| |
| Authors: | ZHANG Fen li ZHANG Cheng e |
| |
| Abstract: | Man made accelerated erosion is a key reason for soil nutrient loss after forestlands were disturbed by human being. Sloping spatial distribution of soil nutrient loss responds to spatial distribution of soil erosion patterns erosion intensity. Shallow gully ditch is the severest position of soil nutrient loss. Soil nutrients abruptly loss in the beginning stage of forest removal. After five years of forest removal, soil nutrient content reduces by 50%. A layer loss in soil profile is a sign of soil nutrient loss. |
| |
| Keywords: | man made accelerated erosion soil nutrient loss Ziwuling second forest area |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《水土保持学报》浏览原始摘要信息 |
|
点击此处可从《水土保持学报》下载全文 |
