| 青藏高原高寒草甸土壤有机质、全氮和全磷含量对不同土地利用格局的响应 |
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| 引用本文： | 张法伟,李英年,汪诗平,赵新全.青藏高原高寒草甸土壤有机质、全氮和全磷含量对不同土地利用格局的响应[J].中国农业气象,2009,30(3):323-326,334. |
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| 作者姓名： | 张法伟 李英年 汪诗平 赵新全 |
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| 作者单位： | 中国科学院西北高原生物研究所,西宁,810001 |
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| 基金项目： | 中国科学院西部行动计划项目，国家科技部支撑项目，中国科学院知识创新工程重要方向项目 |
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| 摘 要： | 草地土地利用格局的变化强烈影响着其土壤营养元素的含量与垂直分布。对青藏高原东北隅高寒草甸不同土地利用格局（封育植被、放牧利用和人工种植）下不同深度（0—10cm、10—20cm和20—40cm）的土壤有机质、全氮和全磷含量的对比研究表明：封育植被下土壤营养元素在表层和深层之间有显著差异（P〈0．05），与土壤深度表现出一定的负线性相关（R2〉0．40，P〈0．05）。放牧利用和人工种植对营养元素在不同土壤层次的分布无显著影响（P均值〉0．05），前者的有机质和全氮含量与土壤深度略呈负线性，后者则无此关系。放牧利用和人工种植较显著地（P均值〈0．05）降低了土壤表层有机质和全氮的含量，但增加了土壤表层全磷的含量，对土壤深层的影响较小。人工种植对营养元素含量的影响效果略大于放牧利用，但两者差异不显著。
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| 关 键 词： | 高寒草甸 土地利用 土壤有机质 土壤全氮含量 土壤全磷含量 |
Response of Soil Organic Matter, Total Nitrogen and Total Phosphor to Different Land Use Patterns in Alpine Meadow of Qinghai-tibetan Plateau |
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| ZHANG Fa-wei,LI Ying-nian,WANG Shi-ping,ZHAO Xin-quan.Response of Soil Organic Matter, Total Nitrogen and Total Phosphor to Different Land Use Patterns in Alpine Meadow of Qinghai-tibetan Plateau[J].Chinese Journal of Agrometeorology,2009,30(3):323-326,334. |
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| Authors: | ZHANG Fa-wei LI Ying-nian WANG Shi-ping ZHAO Xin-quan |
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| Institution: | (Northwest Institution of Plateau Biology, CAS, Xining 810001, China) |
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| Abstract: | The soil nutrient elements contents and vertical distributions are intensively influenced by the land use changes. According to the comparative research of the soil organic matter contents, total nitrogen and total phosphor in the different land use patterns, such as naturally-enclosed vegetation, grazing and cultivation, and in the different soil depths including 0-10cm, 10-20cm and 20-40cm. There were significant difference between the different soil depths and soil nutrient elements. The soil nutrient elements had a negative linear correlation with the soil depths （R2 〉 0.40, P 〈 0.05） in the naturally-enclosed vegetation. The soil nutrient elements weren＇ t significantly affected by grazing and cultivation （mean value of P above 0.05）. In the land use pattern of the grazing, the contents of the soil organic matter and total nitrogen had a negative linear relationship with the soil depths, while it had not a linear relationship in the land use pattern of the cultivation. The organic matter contents and total nitrogen in the soil surface layer decreased, while the total phosphor significantly increased in the land use pattern of the grazing and cultivation （mean value of P below 0.05） , but it was not change in the deep soil layer. Moreover, the influence of the cultivation on the soil nutrient elements was greater than that of the grazing, but not significantly. |
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| Keywords: | Alpine meadow Land use Soil organic matter Total nitrogen Total phosphor |
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