【作者】 陈步峰； 潘勇军； 肖以华； 徐锰； 陈进；

【Author】 Chen Be-feng Pan Yong-jun Xiao Yi-hua Chen-Jin (The Research Institute of tropical Forestry,CAF Guangzhou 510520)

【机构】 中国林科院热带林业研究所；

【摘要】 为了科学地计量评估海岸防护林的生态效应,采用群落生态学和植物化学监测的研究方法,对南海海岸滩头4-5a生防护林群落的生物量、高温胁迫光合特征、NPP及吸储C、N、S、Pb、Cd、Cu、Hg的生态效应进行了定位观测研究,结果表明:海岸各种防护林群落结构的生物量平均达到10.7 t·hm^-2、NPP达到2.5t hm^-2,群落的生长因素表现为速生性生长特征,雨季高温（气温T≥35.5℃）胁迫下,防护林群落优势种群的净光合速率日平均达到9.8μmol·m^-2·s^-1且乡土树种高于引进树种,优势种高山榕的日最高净光合速率达到14.3μmol·m^-2·s^-1,较羊蹄甲高0.4μmol·m^-2·s^-1、较塞楝高2.2μmol·m^-2·s^-1;海防林上层优势树种适宜海岸滩头立地质量及耐高温胁迫的光合生理特点,是其速生长的原因之一;各种结构的海防林群落的年均吸储空间CO₂、NO₂、SO₂质量分别为4.2t hm^-2、27.1kg hm^-2和3.4 kg hm^-2,吸储Pb、Cd、Cu分别为13.2 g hm^-2、4.4g hm^-2、0.1 g hm^-2,其生态环境功能已经初步凸显;海岸防护林群落的吸储效应可有效地减少这些元素在地表和土壤积累、迁移或随地表径流输出至生活环境的危害,对于海岸环境区域是非常有益的。更多还原

【Abstract】 In this paper,we studied the typical coast shield forest,bio-absorbing and accumulating C,N,S and trace elements P_b,C_d,C_u,monitoring of biological communities.The result indicated that mean biomass and NPP on woodland had reached with 10.7 t·hm^-2 and 2.5 t hm^-2 separately for the 4-5 age forest community.The forest community has behaved the character of speed growth.Mean photosynthetic rate of preponderance species had reached with 9.8μmol m^-2 s^-1 under high temperature intimidate at rainy season daylight.And daily peak photosynthetic rate of Ficus altissimahad reached with 14.3μmol m^-2 s（-1） that was more than that of Bauhinia blacken and Kaya senegaiensis with 0.4 and 2.2 separately.Physiological suit and responding of the preponderance species was one of the most reason for the soil physics and chemistry, and high temperature intimidate condition.Mean annual increase mete of CO₂,NO₂ and SO₂ on woodland was remarkable and had reached with 4.2 t·hm^-2,27.1 kg·hm^-2 and 3.4 kg·hm^-2 separately in the coast shield forest.The annual bio-fix of the Pb,Cd and Cu was of 13.2 g hm^-2,4.4 g hm^-2 and 0.1 g hm^-2 separately in the coast shield forest.The entironment function has got initial results that must not supersede for the ecological safe of coast line.更多还原