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收集福建九龙江口人工红树林拉关木(Laguncularia racemosa)中的4、6、8年生3种不同林龄植被全年的凋落物,测定其数量、组成及季节动态.结果表明,4、6、8年生拉关木林年凋落量分别为10 930.1、12 085.3、13 723.4 kg/hm2.各林龄拉关木林的凋落物组成均以落叶为主,4、6、8年生拉关木林的凋落叶量分别占年总凋落量的86.16%、77.47%、81.30%,落枝、落花、落果在年凋落物中所占的比例较小.各林龄拉关木林年凋落物量均显示出明显的季节动态,其季节变化曲线均呈双峰型,4年生和6年生的拉关木林均在5月和9月出现峰值,而8年生的拉关木林则在4月和9月出现峰值;各年龄段的拉关木林的落叶和总凋落量变化模式相同,而落枝、落花、落果的变化模式不尽相同.研究结果可为河口湿地生态系统拉关木人工林的经营管理提供参考.
The annual litterfalls of 3, 6, 8 years old stands in Laguncularia racemosa collected from artificial mangroves in Jiulongjiang estuary of Fujian Province were collected and their numbers, composition and seasonal dynamics were measured.The results showed that 4, 6, The annual litterfalls of the 8-year-old Krabi forest were 10 930.1, 12 085.3 and 13 723.4 kg / hm 2, respectively. The litter composition of Liguan forest was dominated by deciduous litters. The litterfalls of 4, 6, The total annual litterfalls accounted for 86.16%, 77.47% and 81.30% of the total annual litterfall, and the percentage of annual litterfalls such as branches, flowers and deciduous fruits was relatively small. , The seasonal variation curve showed a bimodal pattern, the larch forest of 4-year-old and 6-year-old larvae peaked in May and September, while the 8-year-old larch forest peaked in April and September; The variation patterns of deciduous leaves and total litterfalls were the same in Liguan forest, while the variation patterns of deciduous, fallen flower and deciduous fruits were different.The results could provide reference for the management of Laoguanmigong forest in estuarine wetland ecosystem.