| 杉木林中氮、磷、钾元素的动态模拟分析 |
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| 引用本文： | 彭长辉,钟晓青.杉木林中氮、磷、钾元素的动态模拟分析[J].中南林业科技大学学报,1990(2). |
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| 作者姓名： | 彭长辉 钟晓青 |
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| 作者单位： | 中南林学院林学系
(彭长辉)，中南林学院林学系(钟晓青) |
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| 摘 要： | 以我国南方亚热带杉木人工林为对象,在实测林分养分元素的输入、输出及生物循环的基础上,建立了动态数学模型,并进行了动态模拟分析。结果表明,养分元素在系统内周转的快慢,直接影响着林木的生长,主要营养元素的循环速率依次为N>K>p;对林分施肥,不仅表现为土壤养分贮存量增加,而且使N,p,K的循环速率相应提高;在强度间伐(50%)措施下,N,p,K的循环速率降低,系统内的平衡遭到破坏。
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| 关 键 词： | 模拟分析 养分循环 循环速率 动态数学模型 |
DYNAMIC SIMULATION ANALYSIS OF N,P,K IN CHINESE FIR PLANTATION |
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| Peng Changhui Zhong Xiaoqing.DYNAMIC SIMULATION ANALYSIS OF N,P,K IN CHINESE FIR PLANTATION[J].Journal of Central South Forestry University,1990(2). |
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| Authors: | Peng Changhui Zhong Xiaoqing |
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| Institution: | Department of Forestry |
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| Abstract: | On the basis of the determination of the input, output and biologcal cycle of nutrient element in the subtropical Chinese fir plantations in South China, a dynamic mathematical model has been developed, and dynamic simulation analysis carried out. The results indicate that the speed of nutrient element cycling in the system directly affects the growth of the forest trees. In the order of cycling rate of the main nutrient elements: N is the highest, followed by K, P, respectively. Forest fertilization not only increases the soil nutrients, but also speeds up the cycling rate of N, K, P. When heavy thinning (50%) is practised, the cycling rate of N, P, K decreases, and the system equilibrium is deteriorated. |
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| Keywords: | simulation anlysis nutrient cycle cycling rate dynamic mathematical model |
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