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应用生态学报 ›› 1996, Vol. 7 ›› Issue (4): 349-353.

• 研究论文 • 上一篇    下一篇

受干扰的生态系统Ⅱ.柞蚕林N循环与调控

温达志1, 杨思河2, 李敦求3, 姜波4   

  1. 1. 中国科学院华南植物研究所, 广州510650;
    2. 中国科学院沈阳应用生态研究所, 沈阳110015;
    3. 韩国汉城大学, 汉城441-744;
    4. 辽宁省蚕业科学研究所, 凤城118100
  • 收稿日期:1995-09-19 修回日期:1996-02-02 出版日期:1996-10-25 发布日期:1996-10-25
  • 基金资助:

    辽宁省自然科学基金资助项目

A disturbed ecosystem Ⅱ. Nitrogen cycling and its regulation in tussah-feeding oak plantation

Wen Dazhi1, Yang Sihe2, Don K. Lee3   

  1. 1. South China Institute of Botany, Academia Sinica, Guangzhou 510650;
    2. Institute of Applied Ecology, Academia Sinica, Shenyang 110015;
    3. Seoul National University, Seoul 441-744
  • Received:1995-09-19 Revised:1996-02-02 Online:1996-10-25 Published:1996-10-25

摘要: 揭示了柞蚕林N循环与放蚕强度、土壤肥力、剪伐周期等因子之间的关系结果表明,柞蚕茧收获和周期性剪伐柞树枝叶是影响柞蚕场N平衡的主要因素.放蚕强度和剪伐周期必须根据柞蚕场土壤肥力水平和柞树生长势来确定.调整林下植被组成、种植固N植物能明显提高土壤供N能力,适当施用速效N肥能有效地促进保苗场幼树、幼龄柞墩和恢复老龄柞墩的生长势.

关键词: 柞蚕林, 受干扰生态系统, N循环与调控, 降水事件, 氢氧稳定同位素, 土壤水分, 人工固沙植被区, 水分来源

Abstract: The relationship o[ nitrogen cycling in tussall-feeding cab plantation with feding intensity of tussah silk worms, soil fertility and period of cutting branches and leaves is revealed in this paper. It is shown that cocoon pnduction and Periodical cutting of branches and leaves are the main factors affecting the N balance in tussah-feeding oak plantation. The intensity of feeding tussah silk worms and the pened of cutting branches and leaves must be defined in accordance with the fertility level of soil and tile growth intensity of tree. Regulating the compoLsition of ground vegetation by planting N-fixing speCies can obviously improve soil N condition.Application of N-fertilizers is an effective measure to enhance the nurse oak tree growth and to reinvigorate the growlh of deteriorated oak trees with old root system.

Key words: Tussah-feeding oak plantation, Disturbed ecosystems, Nitrogen cycling and regulations, soil moisture, water sources., artificial sand-fixation region, hydrogen and oxygen stable isotopes, precipitation events