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生态学杂志 ›› 1997, Vol. ›› Issue (6): 22-26.

• 研究报告 • 上一篇    下一篇

香港鸭嘴草+野古草+金茅群落的生物量和第一性生产力

管东生   

  1. 中山大学环境科学系, 广州510275
  • 收稿日期:1996-04-15 修回日期:1996-07-01 出版日期:1997-12-10
  • 基金资助:
    美国洛氏基金

Phytomass and Net Primary Productivity of the Grassland in Hong Kong

Guan Dongsheng   

  1. Department of Environmental Science, Zhongshan University, Guangzhou, 510275
  • Received:1996-04-15 Revised:1996-07-01 Online:1997-12-10

关键词: Ecopath模型, 增殖放流, 生态容量, 中国对虾, 莱州湾

Abstract: Phytomass and net primary production (NPP) of the grassland consisting of Ischaemum spp.+ Arundinella setosa + Eulalia speciosa community have been estimated by harvest method.The results showed that:(1)Above ground phytomass including standing dead matter and litter,was 589 g穖-2 ,of which living phytomass,standing dead matter and litter comprised 63%,26% and 11% respectively. Under ground phytomass was 475 g穖-2 ;(2)Above-ground live phytomass showed a significant seasonal pattern.The grasses sprouted in early spring and their phytomass increased steadily until September,then the live phytomass began to decline;(3) The above-ground current phytomass was not obviously related to monthly rainfall but related to temperature,evaporation and bright sunshine in the study area with plentiful rainfall;(4)Estimated by aggregate peak phytomass(live+dead),470g穖-2穣r-1 was considered as the net above-ground primary production (NAPP) of the grasses. The NAPP of the grasses estimated by aggregated peak phytomass(live+dead) was 36% higher than peak phytomass (live only) and 27% higher than aggregated peak phytomass (live only).NPP of the grassland was 763g穖-2 .

Key words: Ecopath mass-balance model, stock enhancement, ecological carrying capacity, Chinese shrimp, Laizhou Bay of East China.