论文部分内容阅读
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
Under Pinus massoniana forest, larvae, barley, foxtail millet, gorgonella and bitter gourd were interplanted under the forest of Pinus massoniana, respectively, and the mixed forest of coniferous and broadleaf trees was formed.The analysis of forest litter showed that the years of the above five communities The litterfalls were 61 49.1, 75 33.2, 6741.1, 71 15.5 and 80 4 1 .7 kg · hm-2 respectively, while the annual litterfall mass loss was 3442.8 kg · hm-2 in pure Pinus massoniana plantations. The seasonal dynamics of total litterfall in the community showed a bimodal pattern with the first peak occurring from February to April and the second peak occurring in August and September. In the litter composition of the six communities (including pure Pinus massoniana) , Dead leaves accounted for absolute superiority, accounting for 50% -71% of the total litter, followed by litter (6% -26%), other components (5% -1.7%), bark 9% ~ 19%) and reproductive organs (≈ 1%). The litterfalls from Pinus massoniana accounted for 50% ~ 58% of the total and the litter from broadleaf trees accounted for 42% ~ 50% There is a clear difference between the two