【摘要】 在马尾松成林下分别套种拉氏栲、青栲、闽粤栲、格氏栲和苦槠 ,形成针阔混交异龄林模式 .通过对森林凋落物的分析表明 ,上述 5个群落的年凋落物量分别为 61 49.1、 75 33.2、6741 .1、71 5 1 .5和 80 4 1 .7kg· hm-2 ,而马尾松纯林的年凋落物量为 3442 .8kg· hm-2 .各混交群落总凋落物量的季节动态呈双峰型 ,第 1次峰值出现在 2～ 4月份 ,第 2次峰值出现在 8、 9月份 .在 6个群落 (包括马尾松纯林 )的凋落物组成中 ,枯叶占绝对优势 ,在凋落物总量中占5 0 %～ 71 % ,其余依次为枯枝 ( 6%～ 2 6% )、其它组分 ( 5 %～ 1 7% )、树皮 ( 9%～ 1 9% )和繁殖器官 (≈ 1 % ) .各混交群落中来自马尾松的凋落物占 5 0 %～ 5 8% ,而来自阔叶树的凋落物占 42 %～5 0 % ,且两者的组成有明显差异更多还原

【Abstract】 Seedlings of five hardwood tree species,Castanopsis lamontii,Cyclobalanopsis myrsinaefolia,Castanopsis fissa,Castanopsis kawakamii and Castanopsis sclerophylla,were separately interplanted under mature Pinus massoniana plantation to form uneven aged mixed stands Data from field collection revealed that annual litterfall in the above five communities were,respectively,6 149 1,7 533 2,6 741 1,7 151 5 and 8 041 7 kg·hm -2 ,but only 3 442 8 kg·hm -2 in pure Pinus massoniana stand Seasonal dynamics of litterfall in the mixed stands showed binomial patterns,with the first peak occurring between February and April,the second occurring in August or September Analysis on litter composition in all the six stands (including the pure stand) indicated that leaffall accounts for 50%~71% of the total,twigs and branches for 6%~26%,barks for 9%~19%,reproductive organs for about 1%,and miscellaneous materials for 5%~17% In the mixed forests,50%~80% of the total litterfall comes from Pinus massoniana trees,42%~50% from the respective hardwood trees,with significant difference existing between their litter composition更多还原