红树林保护区中互花米草结实器官数量特征研究

1材料与方法 1．1研究区概况 研究地位于广西山口国家级红树林保护区（21°28′N，109°43′E）。该区属南亚热带季风型海洋性气候，年均日照时数为1796～1800h，年均气温23．4℃，气温年变化幅度不大，仅13．8℃，≥10℃年均积温7708—8261℃；年平均降水量1500～1700nm，约有一半的降水量集中在夏季，蒸发量1000～1400mm，平均相对湿度为80％。

A Study of Fructification Quantitative Characteristics of Spartina alterniflora Lossel in Mangroves

Objective] The countermeasure on the number of fructification of Spartina alterniflora in the period of sexual reproduction and the component of seed yielding construction was explored. Method] The Spartina alterniflora in Mangroves conservation zone located at Hepu of Guangxi being taken as experimental material, its morphological and quantitative characteristics, as well as the weight of 100 full seeds at maturity stage in three different growth conditions(clay, loam and sand) were studied. Results] The results showed that Spartina alterniflora had the best growth pattern in the loam. The morphological factors of fructification of S.alterniflora grown in sand were larger than in others. In the three growth conditions the order of quantitative characteristics of fructification of S.alterniflora was clay > sand > loam and the seeds in spikelet at top position were more maturity than those at the button position. Conclusion] In good condition, the Spartina alterniflora growth was vigor but the ratio of seed-setting was low.