福建和溪亚热带雨林凋落物及残留物研究

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．

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

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.