摘要
本文主要探讨了福建九龙江口２０ａ生人工秋茄红树群落Ｃ、Ｈ、Ｎ素的含量、贮备及年动态。结果表明：（１）秋茄植物体不同组分Ｃ、Ｈ、Ｎ素含量有一定差异，含量范围分别为：Ｃ４３．８１％─５１．２２％、Ｈ４．５０％─５．６８％、Ｎ０．２３％─１．８０％，组分间差异程度顺序为Ｃ＜Ｈ＜Ｎ。原子数率为Ｃ（１）Ｈ（１．１１─１．４８）Ｎ（０．００４─０．０３４）。（２）群落Ｃ、Ｈ、Ｎ素现存总库量分别为７４５７．５３ｇ／ｍ￣２、８３７．４８ｇ／ｍ￣２和７３．６１ｇ／ｍ￣２，其中地上部分别占５９．３１％、５８．４０％和５９．５４％，地下部分别占４０．６９％、４１．６０％和４０．４６％。（３）群落年净固定Ｃ素、结合Ｈ素和吸收Ｎ素分别为１１１３．４１ｇ／ｍ￣２、１２４．３７ｇ／ｍ￣２和１６．８３ｇ／ｍ￣２，其中用于群落自身增长而存留的分别为６８４．８８ｇ／ｍ￣２、７７．１５ｇ／ｍ￣２和６．６５ｇ／ｍ￣２，经凋落物年输出的分别为４２８．５３ｇ／ｍ￣２、４７．２２ｇ／ｍ￣２和１０．１８ｇ／ｍ￣２。（４）群落年能量净固定量为４３５４４ｋＪ／ｍ￣２，年Ｏ＿２净释放量为２９６９ｇ／ｍ￣２。
he paper deals mainly with the contents, pool amounts and annual dynamics of C,Hand N elements in 20-year-old Kandelia candel mangrove community in Jiulongjiang RiverEstuary of Fujian,China. The results showed that: 1. The C,H and N contents(%dw )in the various fractions of the plant were different.The range of content was:C 43. 81%─5. 22%,N4. 50%─5. 68%and N 0. 23%─1. 80%,withatom ratio C<1> H<1.11─ 48>N<0.004─0.034. 2. In the standing crop of the community, the pool amounts of C,N and N were7457.53g/m￣2, 837. 48g/m￣2 and 73. 61g/m￣2 respectively,among which the aerial part and un-derground part held 4423. 36g·C/m￣2, 489. 11g·H/m￣2, 43.83g·N/m￣2 and 3034. 17g·C/m￣2,348. 37g· H/m￣2,29. 78g· N/m￣2 respctively. 3. The annual dynamics of C, H and N for the community were annual net fixing1113. 41g· C/m￣2, net binding 124. 37g· H/m￣2,and 16.83g·N/m￣2;annual retention 684.88g· C/m￣2,77. 15g·H/m￣2 and 6. 65g· N/m￣2;annual litter exporting 428.53g· C/m￣2,47.22g·N/m￣2 and 10.18g·N/m￣2.4. For the community,the annual net energy production was about 43544kJ/m￣2 and netO_2 giving out was about 2969g/m￣2.
出处
《生态学报》
CAS
CSCD
北大核心
1995年第3期229-234,共6页
Acta Ecologica Sinica
基金
国家自然科学基金
关键词
红树林
秋茄
碳
氢
氮
生态学
mangrove,Kandelia candel,C,H and N dynamic.
