暖温带地区几种木本植物碳稳定同位素的特点  

Stable carbon isotope characteristics of some woody plants in warm temperate zone.

作　　者：韩兴国[1] 严昌荣[1] 陈灵芝[1] 梅旭荣[2] 

机构地区：[1]中国科学院植物研究所,北京100093 [2]中国农业科学院农业气象研究所,北京100081

出　　处：《应用生态学报》2000年第4期497-500,共4页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金资助项目!(39570 1 2 6)

摘　　要：通过对暖温带落叶阔叶林生态系统主要乔、灌木植物叶片、树干、花、果实碳稳定性同位素比率 (δ13 C值 )测定和比较 ,发现这些植物叶片的δ13 C值受多种因子的影响 ,具有较大的种间差异及时空异质性 .主要表现在不同植物δ13 C值不同 ;种内δ13 C值变化也很大 ,以荆条的差异最大 ,为 6.5 49‰ ( -2 2 .2 2 6‰～ -2 8.775‰ ) ;其次是大叶白蜡 5 .70 6‰ ( -2 3 .687‰～ -2 9.3 93‰ ) ;核桃楸 5 .2 2 9‰ ( -2 6.14 6‰～ -3 1.3 75‰ ) ;辽东栎3 .3 3 3‰ ( -2 4.3 2 4‰～ -2 7.65 7‰ ) ;北京丁香 2 .414‰ ( -2 5 .65 5‰～ -2 8.0 70‰ ) ,山杏δ13 C值的种内差异最小 ,为 2 .2 96‰ ( -2 3 .43 6‰～ -2 6.43 2‰ ) .同种植物的不同器官的δ13 C值也存在差异 ,皮的δ13 C值低 ,木质部的δ13 C值高 .通过对山杏树干木质部δ13 C值与环境因子的分析发现 ,年平均温度和山生杏木质部δ13 C值的大小最为密切 ,其次分别是年降水量、生长季平均温度和生长季降水量 .It was found that the δ 13 C values of the foliar,trunk,flower,and fruit of some woody plants in broad leaved forest in warm temperate zone were affected by many factors,and showed a great interspecific difference and temporal and spatial heterogeneity.The intraspecific variation of δ 13 C values was also great,with the order of Vitex negundo var. heterophylla 6 549‰(-22 226‰～-28 775‰), Fraxinus rhynchophylla 5 706‰(-23 687‰～-29 393‰), Jugans mandshurica 5 229‰(-26 146‰～31 375‰), Quercus liaotungensis 3 333‰(-24 324‰～ -27 657 ‰), Syringa pekinensis 2 414‰(-25 655‰～-28 070‰),and Prunus armeniaca var. ansu 2 296‰(-23 436‰～-26 432‰).Different organs of the same species had different δ 13 C values:trunk and root barks had the low, while xylem had the highest δ 13 C value.According to the relationship analysis between δ 13 C value of Prunus armeniaca var. ansu xylem and environment factors,it was found that δ 13 C value was strongly affected by annual mean temperature and followed by annual precipitation,mean temperature and precipitation in growth season.

关 键 词：木本植物 碳稳定同位素比率 种间差异 暖温带 

分 类 号：S717.14[农业科学—林学]