广西红海榄红树林C、H、N的动态研究

Dynamics of carbon, hydrogen and nitrogen elements in Rhizophora stylosa mangrove community at Yinluo Bay of Guangxi, China

探讨了广西英罗湾７０年生红海榄红树林Ｃ、Ｈ、Ｎ含量、现存贮量、年能量及年Ｏ２的净生产．结果表明，红海榄植物体不同组分，Ｃ、Ｈ、Ｎ含量范围分别为４３．８６—５１．６５、４．３５—５．７２和０．２８—１．４４％．群落Ｃ、Ｈ、Ｎ现存量分别为１４１１７．７、１４４６．４和１５８．５ｇ·ｍ－２．群落年净固定Ｃ７９８．５１ｇ·ｍ－２、结合Ｈ８６．３１ｇ·ｍ－２和吸收Ｎ１２．３３ｇ·ｍ－２．其中，用于群落增长而年存留Ｃ、Ｈ和Ｎ分别为４４１．２２、４５．０１和５．３７ｇ·ｍ－２，年经凋落物输出Ｃ、Ｈ和Ｎ分别为３５７．２９、４１．３０和６．９６ｇ·ｍ－２．群落年能量净生产量为３１２２７ＫＪ·ｍ－２。

Studies on C, H and N contents and storages, annual energy and annual Oz net productions in a 70 years old Rhizophora stylosa mangrove community at Yinluo Bay of Guangxishow that the C, H and N contents in different parts of the plant are 43. 86-51. 65%,4. 35-5. 72% and 0. 28-1. 44%, and their storages in the community are 14117. 7,1446. 4 and 158. 5g·m-2 respectively. The annual net fixed C, H and N by the communityare respectively 798. 51, 86. 31 and 12. 33g·m-2, among which, annual reserved C, Hand N are 441. 22, 45. of and 5. 37 g·m-2, and annual outputs through litter are 357. 29,41. 30 and 6. 96g·m-2 respectively. The annual net production of energy by the community is 31227KJ·m-2, and annual net release of O2 is 2129g·m-2.