通过野外调查和室内测试分析相结合的方法,研究枫香人工林的养分归还,为枫香人工林生态系统经营管理和物质循环研究提供科学依据.结果表明:1)枫香人工林的年凋落量为4 935.6 kg/hm2,凋落量大小依次为落叶＞落枝＞花果＞碎屑；2)凋落物养分年归还量为111.849 kg/hm2,各元素归还量大小依次为N＞Ca＞K＞Mg＞P,各组分归还量大小为落叶＞落枝＞花果＞碎屑；3)降水淋溶养分年归还量为105.823 kg/hm2,各元素淋溶量大小依次为Ca＞K＞Mg＞P＞N;4)枫香人工林总的年养分归还量为217.672 kg/hm2,各元素归还量大小依次为Ca＞N＞K＞Mg＞P.因此,在降水较丰富的亚热带地区,降水淋溶对枫香人工林养分归还的作用不可忽视.%Nutrient return of Liquidambar formosana plantation was studied by means of field investigation and laboratory analysis in this paper, which could provide theoretical basis for the management of Liquidambar formosana plantation and research of the nutrient cycling. Results showed that; 1) The annual amount of litter in Liquidambar formosana plantation was 4 935. 6 kg/hm2, and the amount of each component was in that order: leaf > branches > fruit > debris. 2) The annual nutrient return amount of litter was 111. 849 kg/hm . The order of return amount of each element was N > Ca > K > Mg > P. The return amount of litter in each component was in that order; leaf > branch > fruit > debris. 3) The annual return amount of leaching nutrients was 105. 823 kg/hm . The order of each leaching element was Ca > K > Mg > P > N. 4) The total annual nutrient return amount in Liquidambar formosana plantation was up to 217. 672 kg/hm . The order of each return element was Ca > N > K > Mg > P. It can be concluded that the return of nutrients of litter through rainfall leaching can not be ignored in rainy subtropical area.
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