水土保持学报2011，Vol.25Issue(1)：137-141,5.
氮沉降对杉木人工林凋落物大量元素归还量的影响
Macronutrient Fluxes of the Litterfall in Chinese Fir Plantation in Response to Simulated Nitrogen Deposition
摘要
Abstract
A field experiment was conducted to study the effect of simulated nitrogen on nutrient flux of litterfall in a Chinese fir plantation. Urea (CO(NH2)2) was added at three doses, N1, N2 and N3, 60, 120,240 kg N/(hm2 · a), respectively. Based on litterfall collection during 3 years, through litterfall production,the annual N flux to the forest floor under the four treatments (N0, N1, N2 and N3) was estimated, respectively, at 8.49,8.51,9.57,9.37 kg/hm2 ; P at 0.74, 0.68, 0.73,0.72 kg/hm2 ; K at 3. 57, 3.93, 4.02,3.98 kg/hm2 ; Ca at 6.81, 6.96, 6.76,7.12 kg/hm2 ; Mg at 2.12, 2.22, 2.08,2.30 kg/hm2. The data suggested that the annual flux of N elements responded positively to N1, N2 and N3 treatments, compared with the control (N0), but growth rate decreased with the increasing N additions, negatively to P flux. It showed increased flux of K, Ca, and Mg for N1, N2 and N3 treatments firstly, thereafter decreased with the time passing by. The macronutrient flux through litterfall exhibited three pronounced peaks, occurring consistently in February, April and July respectively, maximum occurred in July.关键词
氮沉降/杉木人工林/凋落物/大量元素/归还量Key words
nitrogen deposition/ Chinese fir plantation/ litterfall/ macronutrient/ flux分类
农业科技引用本文复制引用
刘文飞,樊后保,袁颖红,黄荣珍,廖迎春,李燕燕,沈芳芳..氮沉降对杉木人工林凋落物大量元素归还量的影响[J].水土保持学报,2011,25(1):137-141,5.基金项目
国家自然科学基金资助项目(30370259,30771714,31060109) （30370259,30771714,31060109）
