| 南亚热带7种林分凋落叶养分含量的年动态变化 |
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| 引用本文： | 卢立华,蔡道雄,贾宏炎,何日明.南亚热带7种林分凋落叶养分含量的年动态变化[J].林业科学,2009,45(4). |
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| 作者姓名： | 卢立华 蔡道雄 贾宏炎 何日明 |
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| 作者单位： | 中国林业科学研究院热带林业实验中心,凭祥,532600 |
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| 基金项目： | 国家科技支撑计划，天然次生林生态恢复与定向经营技术研究专题项目 |
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| 摘 要： | 2006-05-2007-04对广西凭祥市7种主要林分凋落叶的N,P,K,Ca及Mg含量进行分析.结果表明:林分凋落叶的N,P,K,ca及Mg含量全年月份动态变化趋势较为一致;在林木生长旺盛的高温雨季4-9月,林分凋落叶的N及P养分含量较高,而K的含量较低;在林木生长缓慢或休眠的干旱低温季10月至翌年3月,凋落叶N及P养分的含量较低,而K的含量较高,说明林分凋落叶的N与P含量与林木生长量成正相关,而K与生长量成负相关;Ca随月份的变化较小,但不同林分之间的差异较大;Mg随月份的变化较大;西南桦凋落叶N含量最高(14.44 g·kg-1),火力楠最低(5.11 g·kg-1);次生林凋落叶P含量最高(1.20 g·kg-1),马尾松最低(仅0.53 g·kg-1);K也以次生林最高(5.16 g·kg-1),马尾松最低(1.71 g·kg-1);Ca以杉木最高(达11.10 g·kg-1),马尾松最低(仅3.76g·kg-1);Mg以次生林最高(3.03 g·kg-1),马尾松最低(1.18 g·kg-1);7种林分凋落叶的N,P,K,Ca与Mg的最高与最低含量比值都超过2.
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| 关 键 词： | 南亚热带 林分凋落叶 养分含量 |
Annual Variations of Nutrient Concentration of the Foliage Litters From Seven Stands in the Southern Subtropical Area |
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| Lu Lihua,Cai Daoxiong,Jia Hongyan,He Riming.Annual Variations of Nutrient Concentration of the Foliage Litters From Seven Stands in the Southern Subtropical Area[J].Scientia Silvae Sinicae,2009,45(4). |
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| Authors: | Lu Lihua Cai Daoxiong Jia Hongyan He Riming |
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| Institution: | The Experimental Center of Tropical Forestry;CAF Pingxiang 532600 |
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| Abstract: | To study the monthly dynamics of forest leaf litterfall,the leaf litters of 7 forests in Pingxiang of Guangxi were collected and their chemical components(N,P,K,Ca and Mg)were determined during the period from May of 2006 to April of 2007.The results indicated that the monthly variations of leaf litter's nutrient contents of N,P,K,Ca and Mg in leaf litters from seven stands had common trends.The contents of N and P in the leaf litterfall were high,while the content of K was low in the rain season(from April... |
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| Keywords: | southern subtropics leaf litterfall nutrient concentration |
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