| 沙棘人工林衰败对林地土壤氮矿化速率的影响 |
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| 引用本文： | 陈金泉,赵忠,李玉新. 沙棘人工林衰败对林地土壤氮矿化速率的影响[J]. 西北林学院学报, 2011, 26(2): 52-56 |
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| 作者姓名： | 陈金泉 赵忠 李玉新 |
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| 作者单位： | 西北农林科技大学西部环境与生态教育部重点实验室; |
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| 基金项目： | 国家“十一五”科技支撑计划项目(2006BAD03A1207) |
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| 摘 要： | 通过测定和比较不同生长发育阶段(8、131、8 a)沙棘人工林土壤氮矿化速率,结合林分结构和天然更新能力,研究了沙棘林衰败对土壤氮矿化速率的影响,期望为该区沙棘人工林的健康评价和科学经营提供理论依据。结果显示,沙棘人工林健康状况随林龄的增长呈正态曲线变化;土壤氮矿化速率与土层深度呈负相关,与全氮含量和碱解氮含量呈极显著相关;不同发育阶段沙棘人工林土壤氮矿化速率与其健康状况相呼应,且都随林龄的增长呈正态曲线变化;不同林龄土壤氮矿化速率大小依次为:13 a>18 a>8 a。
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| 关 键 词： | 沙棘人工林 土壤氮矿化速率 林分结构 天然更新 |
Effects of Degradation of Hippophae rhamnoides Plantation on Soil Nitrogen Mineralization Rate |
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| CHEN Jin-quan,ZHAO Zhong,LI Yu-xin. Effects of Degradation of Hippophae rhamnoides Plantation on Soil Nitrogen Mineralization Rate[J]. Journal of Northwest Forestry University, 2011, 26(2): 52-56 |
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| Authors: | CHEN Jin-quan ZHAO Zhong LI Yu-xin |
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| Affiliation: | CHEN Jin-quan,ZHAO Zhong*,LI Yu-xin(Key Laboratory of Environment and Ecology in West China,Ministry of Education,Northwestern A&F University,Yangling,Shaanxi 712100,China) |
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| Abstract: | By measuring and comparing soil N mineralization rates of the soils of Hippophae rhamnoides plantation with different growth stages(8 a,13 a,18 a),combining with the investigation of forest structure and natural regeneration capacity,effects of the degradation of H.rhamnoides plantation on soil nitrogen mineralization rate were studied to provide theoretical basis for the health evaluation and scientific management the plantations.The results showed that the health status of H.rhamnoides plantation was in a... |
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| Keywords: | Hippophae rhamnoides plantation soil nitrogen mineralization rate stand structure natural regeneration capacity |
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