| 林地开垦后坡面土壤元素的时空变化特征 |
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| 引用本文： | 张成娥,郑粉莉.林地开垦后坡面土壤元素的时空变化特征[J].应用生态学报,2002,13(6):672-674. |
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| 作者姓名： | 张成娥 郑粉莉 |
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| 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,杨凌,712100 |
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| 基金项目： | 国家自然科学基金项目 ( 4 98710 5 0 )，中国科学院知识创新工程(KZCX1 0 6 )资助项目 |
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| 摘 要： | 土壤中常量元素Ca,Mg和微量元素Cu,Zn,Mn,Fe是植物生长必需的重要元素，也是评价土壤质量的重要指标，林地被开垦破坏后，坡面土壤元素的空间分布受人为犁耕活动，侵蚀－沉积－搬运过程和元素性质的影响；林地开垦初期（1－2年），坡面不同部位土壤Cu,Zn,Mn,Fe,K,Ca和Mg皆增加；而开垦两年后，受土壤侵蚀的影响，这些元素又趋于下降；开垦6年后，Cu,Fe,K和Mg比开垦前下降了1.5%-4.56%，SiO2含量在坡面上部随开垦年限的增加而增加，在坡面中部则随开垦年限而减少。Al的变化则与SiO2相反。
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| 关 键 词： | 林地 开垦 坡面 土壤元素 时空变化特征 子午岭林区 土壤侵蚀 |
| 文章编号： | 1001-9332(2002)06-0672-03 |
| 修稿时间： | 2000年4月23日 |
Temporal and spatial change characteristics of soil elements in reclaimed slope forestland |
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| ZHANG Cheng''''e,ZHENG Fenli.Temporal and spatial change characteristics of soil elements in reclaimed slope forestland[J].Chinese Journal of Applied Ecology,2002,13(6):672-674. |
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| Authors: | ZHANG Cheng'e ZHENG Fenli |
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| Institution: | Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100. zhangc-e@nwsuaf.edu.cn |
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| Abstract: | Calcium, Magnesium, Copper, Zinc, Manganese and Iron are necessary elements for plant growth and important indicators for soil quality evaluation. After forestland being reclaimed, spatial distributions of soil elements would be affected by plowing, erosion-deposition-transportation, and soil element properties. In the initial stage of forestland being reclaimed (the first and second year), Cu, Zn, Mn, Fe, K, Ca, and Mg in different slope locations would be increased. After two years, these elements would be decreased because of soil erosion. After six years, Cu, Fe, K, and Mg would be decreased by 1.5-4.56%. SiO2 content on the upper slope would be increased as reclaimed year increased, but on the middle slope, SiO2 content would be decreased and Al element would be increased. |
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| Keywords: | Reclaimed years Soil elements Temporal and spatial change Ziwuling forest area |
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