| 沙地生境和平茬年限对沙柳叶功能特征的影响 |
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| 引用本文： | Zhang PP,Li YY,Shao MA. 沙地生境和平茬年限对沙柳叶功能特征的影响[J]. 应用生态学报, 2011, 22(9): 2240-2246 |
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| 作者姓名： | Zhang PP Li YY Shao MA |
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| 作者单位： | 1. 西北农林科技大学资源环境学院,陕西杨凌712100;中国科学院水利部水土保持研究所,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. 中国科学院水利部水土保持研究所,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;西北农林科技大学水土保持研究所,陕西杨凌712100 |
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| 基金项目： | 国家林业局公益性行业科研专项,中国科学院创新团队国际合作伙伴计划项目 |
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| 摘 要： | 研究了毛乌素沙地南缘水滨边丘间地和干旱丘顶两种生境下沙柳平茬后不同年限(1、2、3～4和5～6年)对沙柳叶片光合气体交换、水分利用效率、结构特性及氮、磷养分含量等叶功能特征的影响.结果表明:水滨边丘间地沙柳叶片的净光合速率、气孔导度、瞬时和长期水分利用效率均高于丘顶,但N、P养分含量低于丘顶;两种生境下沙柳的叶结构性状无显著差异.干旱生境下沙柳主要通过增加养分含量、降低光合和水分利用来生存.随平茬年限增加,叶片净光合速率和气孔导度显著下降,氮含量和瞬时水分利用效率亦呈下降趋势,且二者之间呈显著正相关;平茬后1年的叶面积最高,比叶质量和叶干物质含量最低,此后比叶质量增加,叶面积和干物质含量不变;叶结构性状与光合及养分特性之间无显著相关性.叶光合活性和氮含量的下降是沙柳随平茬年限增加而衰败的重要原因.
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| 关 键 词： | 沙柳 水分生境 平茬年限 叶功能性状 |
Effects of sandy land water habitat and years after rejuvenation pruning on leaf functional traits of Salix psammophila |
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| Zhang Ping-ping,Li Yang-yang,Shao Ming-an. Effects of sandy land water habitat and years after rejuvenation pruning on leaf functional traits of Salix psammophila[J]. The journal of applied ecology, 2011, 22(9): 2240-2246 |
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| Authors: | Zhang Ping-ping Li Yang-yang Shao Ming-an |
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| Affiliation: | ZHANG Ping-ping1,2,LI Yang-yang2,3,SHAO Ming-an2,3 (1Colleage of Resources and Environment,Northwest A & F University,Yangling 712100,Shaanxi,China,2State Key Laboratory of Soil Erosion and Dryland Farming,Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,3Institute of Soil and Water Conservation,China) |
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| Abstract: | This paper studied the effects of habitats (riparian inter-dune and dry top dune) and years after rejuvenation pruning (1, 2, 3-4, and 5-6 years) on the leaf functional traits (gas exchange, water use efficiency, structural traits, and N and P contents) of Salix psammophila growing in the southern edge of Mu Us Sandy Land. In the habitat of riparian inter-dune, the leaf net photosynthetic rate, stomatal conductance, and instantaneous and long-term water use efficiencies were all higher, while the leaf N and... |
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| Keywords: | Salix psammophila water habitats years after rejuvenation pruning leaf functional traits |
| 本文献已被 CNKI 万方数据 PubMed 等数据库收录！ |
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