| 温性荒漠草原土壤酶与肥力的关系 |
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| 引用本文： | 焦婷,常根柱,鱼小军,赵桂琴.温性荒漠草原土壤酶与肥力的关系[J].中国草地学报,2011,33(5). |
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| 作者姓名： | 焦婷 常根柱 鱼小军 赵桂琴 |
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| 作者单位： | 1. 甘肃农业大学草业学院/草业生态系统教育部重点实验室/中—美草地畜牧业可持续发展研究中心,甘肃 兰州,730070
2. 中国农业科学院兰州畜牧与兽药研究所,甘肃兰州,730050 |
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| 基金项目： | 青藏高原草原区牧区家庭牧场资源优化配置技术模式试验与示范(201003019); 甘肃牧区优质高效饲草生产利用技术研究示范(201003023); 国家自然科学基金青年科学基金(31001029) |
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| 摘 要： | 为揭示放牧扰动下土壤养分供给水平的变化,对温性荒漠草原冬春季牧场不同放牧强度下土壤酶活性与肥力因子的关系进行了研究.结果表明:放牧区土壤呈弱碱性；随放牧强度的增加,土壤容重增大；除对照区外,各层土壤含水量、全氮、速效氮、有机质和速效磷均随放牧强度的增加而下降,且随土层深度的加深含量有递减趋势；除重牧区20～30cm土层外,各放牧区各土层土壤脲酶含量差异不显著；土壤碱性磷酸酶各放牧区极显著高于对照区(P＜0.01)；过氧化氢酶除0～10cm土层随放牧强度的增加有增加趋势外,其他各层均表现LG＞ MG＞CK＞ HG的变化.相关分析表明,3种酶与土壤主要肥力因子间相关显著(P＜0.05)或极显著(P＜0.01),说明土壤酶可以用来表征土壤肥力状况；主成分分析同样得出土壤脲酶和过氧化氢酶活性与土壤肥力之间具有良好的相关性,可以用来指示草原退化与恢复状况.
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| 关 键 词： | 温性荒漠草原 放牧强度 土壤肥力 酶活性 主成分分析 |
Study on Relationship between Soil Enzymes and Soil Fertilities on Temperate Desertificated Grassland |
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| JIAO Ting,CHANG Gen-zhu,YU Xiao-jun,ZHAO Gui-qin.Study on Relationship between Soil Enzymes and Soil Fertilities on Temperate Desertificated Grassland[J].Chinese Journal of Grassland,2011,33(5). |
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| Authors: | JIAO Ting CHANG Gen-zhu YU Xiao-jun ZHAO Gui-qin |
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| Institution: | JIAO Ting1,CHANG Gen-zhu2,YU Xiao-jun1,ZHAO Gui-qin1(1.College of Pratacultural Science/Key Laboratory of Grassland Ecosystem of GansuAgricultural University,Lanzhou 730070,China,2.Lanzhou Institute of Animal Husbandry andVeterinary Pharmaceutical Science,CAAS,Lanzhou 730050,China) |
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| Abstract: | Soil enzymes and fertilities in the grassland under different grazing intensities were analyzed to understand the change of soil under grazing disturbance.The results showed as follows: The soil was in weak alkaline in grazing area;water,total nitrogen,available nitrogen,organic matter,soil available potassium and available phosphorus in soil in every depth declined while the soil bulk density increased with the increase of grazing intensity.The activities of urease showed no difference among every depth of... |
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| Keywords: | Temperate desert steppe Grazing intensity Soil fertility Enzyme activity Principal component analysis |
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