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应用生态学报 ›› 1995, Vol. 6 ›› Issue (4): 346-348.

• 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 Ⅱ.施肥对落叶前后杨树叶片营养元素浓度及贮量的影响

陈欣, 宇万太, 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 Ⅱ.Effect of fertilization on concentration and storage of major nutrients in poplar leaves before and after leaf fallen

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

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

摘要: 杨树叶片在凋落前将大量有机质输入干、枝、根中,在不同处理中,不施肥输出的比例大于施肥。施P并不导致杨树对P的奢侈吸收。施肥可使杨树主要营养元素的外循环通量高于不施肥。不施肥杨树叶片在凋落前P、K的输出率比施肥高约10%.

关键词: 杨树, 施肥, 养分循环

Abstract: Poplar leaf can transfer large amount of organic matter from it into trunk, branch and root before its fallen, the output rate in unfertilization treatment being larger than that in fertilization one.Papplication does not leads its luxury absorption by popalr tree.Fertilization can increase the flux of external cyclings of major nutrient, and the output of Pand Kin poplar leaf before its fallen is 10% lower than control.

Key words: Poplar tree, Fertilization, Nutrient cycling