| 台湾桤木根叶养分内循环对施肥的响应 |
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| 引用本文： | 吴勇,李贤伟,张健.台湾桤木根叶养分内循环对施肥的响应[J].光谱实验室,2011,28(3):992-996. |
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| 作者姓名： | 吴勇 李贤伟 张健 |
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| 作者单位： | 1. 四川农业大学生态林业工程重点实验室,四川省雅安市雨城区新康路46号,625014;西华师范大学管理学院,四川省南充市师大路1号,637002
2. 四川农业大学生态林业工程重点实验室,四川省雅安市雨城区新康路46号,625014 |
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| 基金项目： | 国家自然科学基金项目(30771717); 国家“十一五”科技支撑项目(2006BAC01A11); 国家教育部重点学科博士点基金(20050626001); 四川省教育厅重点实验室项目(2006ZD006) |
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| 摘 要： | 对比分析了施肥与未施肥退耕地7年生台湾桤木树叶和细根中N、P、K、Ca、Mg 5种元素内循环差异。结果发现：生活叶和落叶,活细根和死细根中各养分含量和5种元素总养分含量均为树叶〉极细根〉细根;树叶和细根都存在养分内循环,但树叶内循环率高于细根。各养分元素在树叶和细根中的内循环率并不一致,三大元素中K内循环率最高,N次之,P最低;Mg的内循环率较低,而Ca则表现为富集。施肥与树叶和细根中养分变化显著相关（P〈0.01）,施肥后树叶和细根中N,K含量和总养分含量增加,而P、Ca、Mg的含量减少;施肥与树叶养分内循环率变化显著相关（P〈0.01）,与细根养分内循环率变化中度相关,而与极细根养分内循环率变化不相关。
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| 关 键 词： | 施肥 养分内循环 响应 台湾桤木 |
Response of Nutrients Internal Cycling of Alnus Formosana Makino Roots and Leaves to Fertilization |
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| WU Yonga,b LI Xian-Weia ZHANG Jianaab.Response of Nutrients Internal Cycling of Alnus Formosana Makino Roots and Leaves to Fertilization[J].Chinese Journal of Spectroscopy Laboratory,2011,28(3):992-996. |
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| Authors: | WU Yonga b LI Xian-Weia ZHANG Jianaab |
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| Institution: | WU Yonga,b LI Xian-Weia ZHANG Jianaa(Province Key Laboratory of Ecological Forestry Engineering,Sichuan Agricultural University,Yaan,Sichuan 625014,P.R.China)b(College of Administration,China West Normal University,Nanchong,Sichuan 637002,P.R.China) |
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| Abstract: | The nutrients(N,P,K,Ca,Mg) internal cycling of roots and leaves of 7 years old Alnus formosana Makino on fertilized and unfertilized spots were analysized.The order of nutrient elements and total nutrients concentration both in live and dead fine roots and leaves was leaves>very fine roots>fine roots.There were nutrients internal cycling both in leaves and fine roots,but the ratio of leaves was higher.The internal cycling ratio of each nutrient element was different,ratio of K was the highest,ratio of N was... |
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| Keywords: | Fertilization Nutrients Internal Cycling Response Alnus Formosana Makino |
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