受干扰的生态系统Ⅱ．柞蚕林N循环与调控  

A disturbed ecosystem Ⅱ. Nitrogen cycling and its regulation in tussah-feeding oak plantation

作　　者：温达志[1] 杨思河[1] 李敦求 姜波 

机构地区：[1]中国科学院华南植物研究所,中国科学院沈阳应用生态研究所,韩国汉城大学,辽宁省蚕业科学研究所

出　　处：《应用生态学报》1996年第4期349-353,共5页Chinese Journal of Applied Ecology

基　　金：辽宁省自然科学基金

摘　　要：揭示了柞蚕林Ｎ循环与放蚕强度、土壤肥力、剪伐周期等因子之间的关系结果表明，柞蚕茧收获和周期性剪伐柞树枝叶是影响柞蚕场Ｎ平衡的主要因素．放蚕强度和剪伐周期必须根据柞蚕场土壤肥力水平和柞树生长势来确定．调整林下植被组成、种植固Ｎ植物能明显提高土壤供Ｎ能力，适当施用速效Ｎ肥能有效地促进保苗场幼树。The relationship o[ nitrogen cycling in tussall-feeding cab plantation with feding intensity of tussah silk worms, soil fertility and period of cutting branches and leaves is revealed in this paper. It is shown that cocoon pnduction and Periodical cutting of branches and leaves are the main factors affecting the N balance in tussah-feeding oak plantation. The intensity of feeding tussah silk worms and the pened of cutting branches and leaves must be defined in accordance with the fertility level of soil and tile growth intensity of tree. Regulating the compoLsition of ground vegetation by planting N-fixing speCies can obviously improve soil N condition.Application of N-fertilizers is an effective measure to enhance the nurse oak tree growth and to reinvigorate the growlh of deteriorated oak trees with old root system.

关 键 词：受干扰生态系 柞蚕林 N循环 调控 柞树 

分 类 号：Q147[生物学—生态学] S794.902[生物学—普通生物学]