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应用生态学报 ›› 1995, Vol. 6 ›› Issue (4): 341-345.

• 研究论文 • 上一篇    下一篇

不同施肥杨树主要营养元素内外循环比较研究 Ⅰ.施肥对杨树生物量及落叶前后N内外循环的影响

宇万太, 陈欣, 张璐, 殷秀岩, 沈善敏   

  1. 中国科学院沈阳应用生态研究所陆地生态系统痕量物质生态过程开放实验室, 沈阳 110015
  • 收稿日期:1995-01-25 修回日期:1995-05-26 出版日期:1995-10-25 发布日期:1995-10-25
  • 基金资助:

    国家自然科学基金;中国科学院陆地生态系统痕量物质生态过程开放实验室基金

Comparative study on internal and external nutrient cyclings or poplar tree under different fertilizations Ⅰ.Effect of fertilization on biomass or poplar tree and its internal and external cypling of N before and after leaf fallen

Yu Wantai, Chen Xin, Zhang Lu, Yin Xiuyan, Shen Shanmin   

  1. Laboratory of Ecological Process of Trace Substance in Terrestrial Ecosystem, Institute of Applied Ecology, Academia Sinica, Shenyang 110015
  • Received:1995-01-25 Revised:1995-05-26 Online:1995-10-25 Published:1995-10-25

摘要: 施肥对杨树具有明显的增产作用,而根的增长尤其显着。不论施肥与否叶均是生长中杨树N的重要贮存库,并且落叶前将其所含N的63%左右迁移至干枝根的皮层和木材中。施肥可使杨树N的总循环量增加46%,并且可改变N的循环结构。与不施肥处理相比,施肥可使杨树N外循环通量占总循环通量的比率由36.7%增加至44.7%.

关键词: 施肥, 杨树, 养分循环

Abstract: Fertilization can significantly increase the biomass of poplar tree, especially that of its root.Whether fertilization or not, leaf is the major N pool for the growing poplar tree, and about 63% of N in it is transfered into trunk, branch and root before its fallen.Fertilization can increase the gross flux of N by 46%, and change the structure of N cyce in poplar tree.Comparing with control, fertilization can increase the rate of internal flux vs.gross flux from 0.37 to 0.45.

Key words: Fertilization, Poplar tree, Nutrient cycling