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苏南丘陵次生栎林生态系统磷素循环的系统分析与预测
引用本文:陈金林,姜志林,张武兆,张井义,贾永正.苏南丘陵次生栎林生态系统磷素循环的系统分析与预测[J].生态学杂志,2000,19(1):1-5,11.
作者姓名:陈金林  姜志林  张武兆  张井义  贾永正
作者单位:南京林业大学森林资源与环境学院,210037
基金项目:本研究为国家林业总局重点课题“下蜀森林生态系统定位研究”部分内容。
摘    要:森林生态系统中的养分循环是该系统的主要功能之一 ,历来为许多研究者所重视1,4 ,5] 。磷是植物生长发育所不可缺少的重要营养元素 ,它对促进林木生长 ,提高林业生产力具有很大作用。以往有关森林生态系统磷素循环的研究 ,大多忽视了根系凋落归还的作用 ,从而影响循环结果及其相应评价。为此 ,研究了苏南丘陵次生栎林生态系统磷素循环 ,并进行系统分析 ,建立生态系统磷素动态模型 ,预测并分析其变化规律 ,为制定合理的经营管理措施 ,保持林业持续发展提供理论依据。1 自然概况与研究方法1.1 自然概况试验地位于江苏省句容县境内 ,东经119…

关 键 词:次生栎林  生态系统  养分循环  磷素  动态模型

System Analysis and Prediction of Phosphorus Cycling in the Ecosystem of Secondary Oak Forest in the Hilly Region of Southern Jiangsu Province.
Chen Jinlin,Jiang Zhilin,Zhang Wuzhao,Zhang Jingyi,Jia Yongzheng.System Analysis and Prediction of Phosphorus Cycling in the Ecosystem of Secondary Oak Forest in the Hilly Region of Southern Jiangsu Province.[J].Chinese Journal of Ecology,2000,19(1):1-5,11.
Authors:Chen Jinlin  Jiang Zhilin  Zhang Wuzhao  Zhang Jingyi  Jia Yongzheng
Abstract:System analysis and prediction of phosphorus cycling in the ecosystem of secondary oak forest was carried out in the hilly region of Southern Jiangsu Province. The main results indicated that the total amount of phosphorus in the ecosystem of 45 - years - old oak forest was 3205. 213kg· ha-1, of which about 97.6 % was stored in the soil compartment and only 2.4 % in the vegetation. The trees only used a little amount of total phosphorus in the ecosystem. The phosphorus dynamic showed that the total amount of phosphorus absorbed by the oak increased with years, but the productivity and the phosphorus accumulation rate in the oak ecosystem decreased gradually. However, if increasing of external phosphorus input or decreasing of phosphorus output, the growth of oak would be promoted and the phosphorus accumulation rate in the ecosystem was also accelerated. Therefore, the rational management of the oak forest ecosystem was important and necessary.
Keywords:secondary oak forest  ecosystem  phosphorus cycling  system analysis  prediction  
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