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应用生态学报 ›› 2002, Vol. ›› Issue (5): 533-538.

• 研究论文 • 上一篇    下一篇

锥栗人工林结果初期养分动态特征及其模拟

陈辉1, 何方2   

  1. 1. 福建林学院资源与环境系, 南平 353001;
    2. 中南林学院经济林研究所, 株洲 412006
  • 收稿日期:1999-06-02 修回日期:2000-01-05
  • 通讯作者: 陈辉,男,1957生,博士,教授,主要从事经济林生态培育、速生丰产及林业系统工程等领域研究,发表论文40余篇.E-mail:zjchchenh@163.com
  • 基金资助:
    福建省教委自然科学基金重点资助项目(K97042)

Dynamic characteristics of nutrient elements in Castanea henryi plantation at beginning of fructification and its simulation

CHEN Hui1, HE Fang 2   

  1. 1. Department of Resources and Environment, Fujian Forestry College, Nanping 353001;
    2. Research Institute of Nontimber Product Forest Corps, South Central Forestry College, Zhuzhou 412006
  • Received:1999-06-02 Revised:2000-01-05

摘要: 应用系统分析和动态模拟的方法,对结果初期锥栗人工林的养分动态变化进行了分析和模拟,构建了林分树体地上部分、地下部分、土壤和凋落物4个分室,测定了各分室的N、P、K、Ca、Mg各养分元素的现存库量.土壤分室中N、P、K、Ca的现存量最高,分别达311.47、11.436、218.9kg·hm-2和8756kg·hm-2,Mg含量水平以凋落物分室最高,达7.269kg·hm-2.根据分室模型,计算了5种元素各分室的流通量和流通率,并在不同营养元素补偿水平下,对系统各分室在未来5年内的养分变化进行了模拟,结果表明,各元素每年最适宜的补充量为N20kg·hm-2、P8kg·hm-2、K5kg·hm-2、Ca10kg·hm-2、Mg5kg·hm-2.在这种补偿条件下,系统各分室间养分流动通畅,树体生长代谢正常.研究结果可为锥栗人工林该期栽培营养管理提供依据.

关键词: 锥栗人工林, 养分元素, 系统分析, 动态模拟, 产量, 氮肥, 磷肥, 钾肥, 有机肥, 西瓜

Abstract: The dynamic variation of nutrient elements in Castanea henryi plantation was analysed and simulated by means of a system analysis,and the models of four compartments including aboveground,root,soil and litter were constructed. Evaluation on the nutrient pools of N,P,K,Ca and Mg in the four compartments at the beginning of fructification showed that soil compartment had highest content of N,P,Kand Ca which was up to 311.47,11.64,218.90 and 87.56 kg穐m-2,respectively.The highest Mg occurred in litter compartment, up to 7.563 kg穐m-2.Based on the compartment model,the fluxes and rates of the five nutrient elements between the compartments were calculated,and their changing trends in compartments in5 years were forecasted.The results showed that the most suitable amount of annually compensating the five elements was 20(N),8(P),5(K),10(Ca) and 5(Mg) kg穐m-2,respectively.This nutrient compensation promoted the nutrient flows,and normalised the growth and metabolism of the tree.The research could provide with important basic data for nutrient management of this type of plantation at this stage.

Key words: Castanea henryi, Nutrient element, System analysis, Simulation, nitrogen fertilizer, phosphorus fertilizer, potas-sium fertilizer, yield, watermelon, organic fertilizer

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