| 赵锦梅,刘长仲,张德罡.土地利用方式对东祁连山土壤表层有机碳的影响[J].干旱地区农业研究,2012,30(4):82~85 |
| 土地利用方式对东祁连山土壤表层有机碳的影响 |
| Effect of different land use patterns on organic carbon in surface soil in eastern Qilian Mountains |
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| DOI：10.7606/j.issn.1000-7601.2012.04.15 |
| 中文关键词: 有机碳 土壤表层 土地利用方式 祁连山东段 |
| 英文关键词:organic carbon surface soil land use pattern eastern Qilian Mountains |
| 基金项目:国家自然科学基金项目（30960082）资助 |
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| 中文摘要: |
| 在祁连山东段高寒地区，选取天然草地、退耕自然恢复地、坡耕地和人工草地4种土地利用方式，研究了土地利用方式对土壤表层有机碳含量和
有机碳密度的影响。结果表明：在4种土地利用方式中天然草地土壤表层有机碳含量最高，坡耕地和退耕自然恢复地土壤表层有机碳含量较低；土壤表层有机碳密度整体上随着土层加
深而逐渐降低，在0～30 cm土层土壤有机碳密度表现为天然草地（15.81 kg/m2）>人工草地（7.56 kg/m2）>坡耕地（6.08 kg/m2）>退耕自然恢复地（5.48 kg/m2）。研究表明，土地利用方式对土壤表层有机碳含量和有机碳密度有显著影响（P＜0.05）。 |
| 英文摘要: |
| In alpine areas of eastern Qilian Mountains, four land use patterns, such as natural grassland, naturally restored abandoned cropland, slope cropland and sown grassland were selected to study the effect of diff
erent land use patterns on the content and density of organic carbon in surface soil. The results showed that the content of organic carbon in surface soil of the natural grassland was the highest, while that of the naturally restored abandoned cropland and slope cropland was the lowest; With the soil depth increased, the density of organic carbon in surface soil gradually reduced; In 0～30 cm soil layer, significant differences existed in the density of organic carbon in surface soil among 4 types of land use patterns (P＜0.05), the spatial distribution of the density of organic carbon in surface soil performanced as natural grassland (15.81 kg/m2)＞sown grassland (7.56 kg/m2)＞slope cropland (6.08 kg/m2)＞naturally restorated abandoned cropland (5.48 kg/m2). All these indicated that land use patterns had significant effect on the content and density of organic carbon in surface soil. |
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