福建和溪亚热带雨林凋落物及残留物研究

Studies on Litter Fall and Residues in the Subtropical Rain Forest in Hexi of Fujian

探讨福建和溪亚热带雨林凋落物产量和地表残留物累积及其动态．结果表明；该雨林年凋落物量为７５５．４３ｇ／ｍ２（年变率为１．１７），其中叶为５１７，３５ｇ／ｍ２，枝为１９１．７５ｇ／ｍ２，花为２１．７６ｇ／ｍ２和果为２４．５７ｇ／ｍ２．影响凋落物月分布的主要因素是降雨及植物的物候期．月凋落物量（ｙ）与月降雨量（１）呈正相关（ｙ＝４６．２８９４＋０．１２０６ｙ，，ｒ＝０．５１０４，ｄｆ＝３４，ｐ＜０．０１）．林地残留物现存累积量随季节的不同而异，平均为４２６．２０ｇ／ｍ２（年分解常数Ｋ＝１．８７），其中叶３０７．６４ｇ／ｍ２，枝１０６．７７ｇ／ｍ２，花０．６０ｇ／ｍ２和果１１．１９ｇ／ｍ２．

The litter production,residues accumulation and dynamic were studied in the subtropical rain forest in Hexi of Fujian. The results showed that: Mean annual litter fall production of the subtropical rain forest was 755. 43 g/m2 (yearly variation index 1, 17),in which the leaf,branch,flower and fruit was 517. 35, 191. 75,21. 76 and 24. 57 g/m2 respectively. Monthly distribution of litter production was mainly influenced by rainfall and phenological phase. Monthly litter fall(y) was positively correlated with rainfall (x), and regression equation was: y=46.2894+0. 1206x (r= 0. 5104, df= 34, p<0. 01 ). The standing crop of residual litter on the forest floor was various with changing season.and the mean was 426. 20 g/m2 (with annual decomposion constant 1. 87), in which the leaf, branch, flower and fruit was 307. 64, 106. 77, 0. 60 and 11. 1 9 g/m2, respectively.