Nitrogen cycling and its dynamic feature in fine roots of poplar trees and herbs

Abstract

Abstract: The nitrogen cycling and its dynamic feature in fine roots of poplar trees and herbs were studied in Shenyang of Liaoning Province. The results showed that the nitrogen content in the standing biomass of fine roots of poplar trees and herbs was 20.3 kg穐m^-2,and its net accumulation was 10.0 kg穐m^-2. With regard to the biological cycling of nitrogen,the annual uptake was 14.6 kg穐m^-2 of which,the retention and the return was 9. 6 and 5.1 kg穐m^-2穣r^-1 respectively,and the turnover period was 4 year. The relationship between total nitrogen in roots of poplar trees, and herbs and the available nitrogen in soil was also studied, which indicated that there were similar dynamic trends between total nitrogen in herb roots and the NH₃-N in soil in growth season. The total nitrogen in fine roots of poplar trees was positively related to the biomass.

CLC Number:

Q945.1

FAN Shihua, LI Peizhi, WANG Lihua, XU Siming . Nitrogen cycling and its dynamic feature in fine roots of poplar trees and herbs[J]. Chinese Journal of Applied Ecology, 2004, (3): 387-390.

References

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