摘要
施肥对杨树具有明显的增产作用，而根的增长尤其显著．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％．
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. P application does not leads its luxury absorption by popalr tree. Fertilization can increase the flux of external cyclings of major nutrient, and the output of P and K in poplar leaf before its fallen is 10% lower than control.
出处
《应用生态学报》
CAS
CSCD
1995年第4期346-348,共3页
Chinese Journal of Applied Ecology
基金
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
