平朔露天煤矿复垦区刺槐油松混交林凋落物量及动态特征

Amount and Dynamic Characteristics of Litter Fall in Robinia pseudoacacia × Pinus taebelaefolius Mixed Forest in Reclamation Region of Pingshuo Opencast Coal Mine

为了解平朔露天煤矿复垦区刺槐油松混交林凋落物量及动态特征,采用野外凋落物收集器法,对平朔矿区刺槐油松混交林凋落物的年凋落量、组成以及年凋落物的月动态、不同组分的月动态进行研究。结果表明,刺槐油松混交林凋落物年凋落量为3 787.28 kg/hm2;各组分年凋落量差异极为悬殊,其中,落叶占77.47%,是该森林群落凋落物的主要组成成分,枝占11.15%,花占2.66%,果占6.81%,皮占1.52%,芽占0.20%,杂物占0.19%;总凋落量月动态变化呈单峰曲线,最大值出现在10月,达1 622.36 kg/hm2;各组分凋落量月动态有一定差别,其中,叶凋落物量与总凋落量变化规律一致,最大值出现在10月。

To find out the amount and dynamic characteristics of litter fall in Robinia pseudoacacia×Pinus taebelaefolius mixed forest in reclamation region in Pingshuo opencast coal mine, the paper investigated the annual litter fall amount and composition, month dynamic of litter production and component production, using field collection container. The results showed that the annual litter fall amount was 3 787.28 kg/hm2, there were significant differences of litter fall composition, of which 77.47% was for leaves, among which the greatest component was leaves litter fall, 11.15% for twigs, 2.66% for flowers, 6.81% for fruits, 1.52% for barks, 0.20% for buds,0.19% for others. Furthermore, the month dynamic of litter production appeared to be single climax curve, in which the highest point occurred in October（1 622.36 kg/hm2）. The different components had different flopping process, the leaf litter was consistent with the trend of the total litter production, which the highest point occurred in October.