全年收集广州南沙湿地游览区人工红树林中的6龄无瓣海桑Sonneratia apetala、4龄无瓣海桑和6龄海桑S.caseolaris3种林分的凋落物,并对凋落物量作全年变化分析,结果表明:3种林分凋落物总生物量呈现单峰的季节变化,峰值出现在8-9月,在12月至次年2月达到较低值.3种林分凋落物总生物量大小依次为6龄无瓣海桑(1 519.30g·m-2·年-1)＞6龄海桑(1 446.94 g·m-2·年-1)＞4龄无瓣海桑(1323.45g·m-2·年-1).其中,叶、枝、花和果的凋落物生物量组成比例不一,但均以叶为主要组分,其比例超过60％;均以花所占总凋落物生物量的比例最小.%Litters from 3 stands of mangrove, I. E. , 6-year-old Sonneratia apetala, 4-year-old S. Apetala, and 6-year-old S. Caseolaris, were collected in the area of Nansha Wetland of Guangzhou. An analysis of annual variation in litter production showed that the total litter of the stands exhibited a seasonal change with a single peak. The highest peak appeared during August and September, and shifted to a lower level between December and February. The total litter production of the three mangrove stands was in the order of 6-year-old S. Apetala( 1 519. 30 g·m-2·year-1) > 6-year-old S. Caseolaris( 1 446.94 g·m-2 ·year-1) > 4-year-old S. Apetala (1 323.45 g·m-2 · year-1 ). Although the amounts of leaf, branch, flower and fruit in composition were different, the leaf was the main component and its proportion exceeded 60% among them. The flower proportion of the total litter production was the lowest.
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