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

Chinese Journal of Applied Ecology ›› 1995, Vol. 6 ›› Issue (4): 341-345.

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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

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

Abstract

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

Yu Wantai, Chen Xin, Zhang Lu, Yin Xiuyan, Shen Shanmin . 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[J]. Chinese Journal of Applied Ecology, 1995, 6(4): 341-345.

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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

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