| 荒漠草原人工柠条林重建的土壤养分效应 |
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| 引用本文： | 宋乃平,杨新国,何秀珍,何彤慧,李勇,刘孝勇.荒漠草原人工柠条林重建的土壤养分效应[J].水土保持通报,2012,32(4):21-26. |
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| 作者姓名： | 宋乃平 杨新国 何秀珍 何彤慧 李勇 刘孝勇 |
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| 作者单位： | 西北土地退化与生态恢复国家重点实验室培育基地,宁夏银川750021 西北退化生态系统恢复与重建教育部重点实验室宁夏大学,宁夏银川750021 |
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| 基金项目： | 国家重点基础科学(973)研究发展计划前期专项“北方农牧交错典型脆弱区生态环境变化过程及驱动力研究”(2009CB426304);国家自然科学基金项目(30960075) |
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| 摘 要： | 采用时空互代方法,构建了由天然草地和7,12,27a柠条林组成的序列,对其下土壤有机质、全氮、碱解氮、有效磷进行了研究。结果表明:(1)0—200cm土壤剖面上的有机质含量由草地、幼龄林、中龄林、老龄林依次增加,有机质含量增加的显著程度随着林龄的增加在更深土层上体现。(2)全氮含量由草地到幼龄林阶段显著增加,由幼龄林到中龄林再到老龄林依次减少。幼龄林、中龄林、老龄林之间全氮含量减少的最大幅度随林龄增加向土壤深层移动。碱解氮与全氮具有一致的规律。(3)整个土壤剖面上有效磷含量依次为:老龄林<幼龄林<中龄林<草地。(4)3个不同林龄的柠条林的有机质、全氮、有效磷在柠条行内和行间的空间差异均不显著。柠条行内与行间的有机质和全氮相关程度很高,有效磷相关性不显著。
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| 关 键 词： | 人工柠条林 土壤养分效应 荒漠草原 |
| 收稿时间： | 2011/10/14 0:00:00 |
Soil Nutrient Effect of Desert Steppe Reconstructed by Artificial Caragana Microphylla Stand |
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| SONG Nai-ping,YANG Xin-guo,HE Xiu-zhen,HE Tong-hui,LI Yong and LIU Xiao-yong.Soil Nutrient Effect of Desert Steppe Reconstructed by Artificial Caragana Microphylla Stand[J].Bulletin of Soil and Water Conservation,2012,32(4):21-26. |
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| Authors: | SONG Nai-ping YANG Xin-guo HE Xiu-zhen HE Tong-hui LI Yong and LIU Xiao-yong |
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| Institution: | 1.Cultivation Base for State Key Lab.of Restoration and Reconstruction of Degraded Ecosystem in Northwestern China,Yinchuan,Ningxia750021,China;2.Key Lab.for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China of Ministry of Education,Ningxia University,Yinchuan,Ningxia750021,China) |
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| Abstract: | Using spatiotemporal substitution method,we constructed a sequence which was formed by natural grassland and Caragana microphyllastands of 7(young),12(intermediately aged)and 27(old)years old.In addition,we measured and analyzed the variations of the soil nutrients including organic matter,total nitrogen,alkali-hydro nitrogen,and available phosphorus.The results show that:(1)The soil organic matter contents within 0—200cm displayed an ascending order of the cover as meadows
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| Keywords: | artificial Caragana microphylla stand soil nutrient effect desert steppe |
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