中文摘要：

以浙江天童常绿阔叶林木荷群落为对象，2011年研究了不同施氮磷肥水平下凋落物生产量和养分动态特征．结果表明：增施氮磷肥处理后，木荷群落凋落物的年生产量在6．82～8．30t·hm-2·a-1，呈“三峰型”季节动态模式；凋落物年平均氮含量（P处理除外）和年平均磷含量增加；凋落物氮磷含量季节动态发生改变，而对凋落物氮年归还量（60．05～71．47kg·hm-2·a-1）和磷年归还量（2．94—3．93kg·hm-2·a-1）没有显著影响．与对照相比．试验初期（2011年春季）各施肥处理下的凋落叶氮磷比普遍较高，而2011年冬季较低，说明长期施加氮磷肥可能改变森林生态系统原有的氮磷限制状况．

英文摘要：

In 2011, an investigation was made on the litterfall production and nutrient dynamics in a phosphorus-limited subtropical evergreen broadleaved forest dominated by Schima superba in Tian- tong, Zhejiang Province of East China under different levels of nitrogen （N） and phosphorous （P） fertilization. After the N and P fertilization, the annual litterfall production ranged from 6.82 to 8.30 t . hm-2 . a-1 , with three peaks in May or June, August, and October, respectively. Under fertilization, the annual average N and P concentrations of the litterfall （ except the annual average N concentration under P fertilization） increased, and had a seasonal variation. There were no sig- nificant differences in the nitrogen return amount （60.05-71.47 kg . hm-2. a-1） and phosphorus return amount （2.94-3.93 kg . hm-2 .a-1 ） of the litterfall among different treatments. As com- pared to the control, the N ： P ratio of the litterfall under fertilization was higher at the beginning of the experiment （spring, 2011 ）, but lower in the winter, 2011, indicating that nitrogen and phos- phorns fertilization could alter the original nitrogen and phosphorus limited conditions of the studied forest ecosystem.