| 拉脊山亚高寒草甸退化程度对土壤养分影响的研究 |
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| 引用本文： | 赵殿智,徐志伟.拉脊山亚高寒草甸退化程度对土壤养分影响的研究[J].草业与畜牧,2007,23(10):4-7. |
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| 作者姓名： | 赵殿智 徐志伟 |
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| 作者单位： | 1. 青海省三角城种羊场,青海,刚察,812300
2. 青海大学,青海,西宁,810016 |
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| 摘 要： | 对亚高寒草甸土壤因素的调查分析，结果表明：全氮和全钾含量随退化程度的加深而减小。依次是轻度退化、中度退化和极度退化。随着草地退化程度的加剧，地上、地下生物量以及土壤全氮、全钾的含量也随之下降。不同退化程度间土壤全磷含量变化不明显，各层次之间虽然有上升趋势，但变化较小。全磷在土壤剖面中分布较均匀，说明退化强度对高山草甸草原土土壤全磷的影响相对较小。高寒草甸生态系统的恶化，不仅使群落物种组成发生了巨大变化，而且导致物种多样性发生改变，这与过度放牧和环境因子的影响程度有着密切的关系。
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| 关 键 词： | 土壤因素 退化程度 土壤养分影响 |
| 文章编号： | 1673-8403（2007）10-0004-04 |
| 修稿时间： | 2007-04-03 |
Research on the Effect of Degradation Degree of Subalpine Meadow on Soil Nutrient in Laji Mountain Area |
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| ZHAO Dian-zhi,XU Zhi-wei.Research on the Effect of Degradation Degree of Subalpine Meadow on Soil Nutrient in Laji Mountain Area[J].Pruataculture & Animal Husbandry,2007,23(10):4-7. |
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| Authors: | ZHAO Dian-zhi XU Zhi-wei |
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| Institution: | 1. Qinghai gangcha sanjiao city sheep breeding farm, Gangcha 812300, China; 2. Qinghai university, Xining 810016, China |
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| Abstract: | After investigation and analysis of soil factors of subalpine meadow, the results showed that the content of total N and K decrease with the degradation of grassland, ordered by light degraded meadow, medium degraded meadow, heavily degraded meadow. The aboveground and underground biomass, and total N, total K content decrease with the degradation of grassland. The content of total P in different degradation degrees had no significant change, although there was an ascending tendency, the change was little. Total P distribution in soil section was homogeneous, which indicated that degradation degree had less effect on the total P in soil of subalpine ecosystem not only changed the species composition a lot, but also made the meadow. The deterioration of alpine meadow species diversity changed, which had a close relationship with overgrazing and environmental factors. |
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| Keywords: | Soil factor Subalpine meadow Effect of soil nutrient |
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