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| 退化高寒草甸土壤有机碳分布特征及与土壤理化性质的关系 | |
| 引用本文： | 曹丽花,刘合满,赵世伟.退化高寒草甸土壤有机碳分布特征及与土壤理化性质的关系[J].草业科学,2011,28(8):1411-1415. |
| 作者姓名： | 曹丽花 刘合满 赵世伟 |
| 作者单位： | 1. 西藏农牧学院资源与环境系,西藏林芝860000／西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100 2. 西藏农牧学院资源与环境系,西藏林芝,860000 3. 西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌,712100 |
| 基金项目： | 西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10501-249,10501-292); 西藏农牧学院青年科研基金 |
| 摘 要： | 本研究对西藏当雄不同退化程度高寒草甸土壤有机碳分布特征及其与土壤理化性质演变进行分析，结果表明，土壤有机碳及有机碳密度均为正常草甸土壤>轻度退化草甸土壤>严重退化草甸土壤，且0~10 cm土层中有机碳含量及其密度均高于10~20 cm土层土壤。回归分析表明，土壤有机碳与土壤活性有机碳、土壤碱解氮、速效磷、速效钾及土壤含水量之间存在显著或极显著的正相关关系，其决定系数R2分别为0.913 9、0.977 1、0.931 4、0.665 3和0.715 6，直线回归方程分别为y=0.074 3x-0.026 1，y=2.676 8x+14.425 0，y=0.245 9x+3.347 9，y=4.296 5x+71.667 0，y=0.790 8x+5.424 5；而与土壤容重呈显著负相关关系（y=-0.016 7x+1.553 1）。土壤有机碳的损失，造成土壤养分和水分减少，土壤容重增大。通径分析表明，土壤有机碳的变化对碱解氮的影响最显著。 |
| 关 键 词： | 土壤有机碳 土壤有机碳密度 高寒草甸土壤 理化性质 |
Distribution of soil organic carbon and its relationship with soil physical and chemical properties on degraded alpine meadows |
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| CAO Li-hua,LIU He-man,ZHAO Shi-wei.Distribution of soil organic carbon and its relationship with soil physical and chemical properties on degraded alpine meadows[J].Pratacultural Science,2011,28(8):1411-1415. | |
| Authors: | CAO Li-hua LIU He-man ZHAO Shi-wei |
| Institution: | CAO Li-hua1,2,LIU He-man1,ZHAO Shi-wei2(1.Department of Resources and Environmental Science,Tibet Agriculture and Animal Husbandry College,Tibet Linzhi 860000,China,2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Northwest A & F University,Shaanxi Yangling 712100,China) |
| Abstract: | Soil organic carbon,soil active organic carbon,soil alkali-hydrolysable nitrogen,soil available phosphorus,soil available potassium,soil water content and soil bulk density were determined to study the distribution of soil organic carbon and soil physical and chemical properties on degraded alpine meadows in Dangxiong,Tibet.Results showed that the change orders of soil organic carbon content and its density both in the 0-10 cm and 10-20 cm soil layers were normal meadow>slightly degraded meadow>serious degr... |
| Keywords: | soil organic carbon soil organic carbon density alpine meadow soil physical and chemical properties |
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