不同年代梭梭叶功能性状差异及其与土壤因子的关系  

Variation in leaf functional traits of different-aged Haloxylon ammodendron communities,and the relationship with soil factors

作　　者：王飞[1,2] 郭树江 樊宝丽[1] 张卫星 王方琳[1,2] 韩福贵[1,2] 张裕年[1,2] 孙涛 WANG Fei;GUO Shujiang;FAN Baoli;ZHANG Weixing;WANG Fanglin;HAN Fugui;ZHANG Yunian;SUN Tao(Gansu Desert Control Resesrch Institiute,Lanzhou 730070,Gansu,China;State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating,Wuwei 733000,Gansu,China;Gansu Minqin National Studies Station for Desert Steppe Ecosystem,Minqin 733300,Gansu,China)

机构地区：[1]甘肃省治沙研究所,甘肃兰州730070 [2]甘肃省荒漠化与风沙灾害防治国家重点实验室(培育基地),甘肃武威733000 [3]甘肃民勤荒漠草地生态系统国家野外科学观测研究站,甘肃民勤733300

出　　处：《草业科学》2020年第12期2486-2496,共11页Pratacultural Science

基　　金：国家青年科学基金项目(31700339);国家地区基金项目(31760238、31960334、31860116、31660237);国家面上基金项目(41671528);中科院“西部之光”计划。

摘　　要：本研究以民勤不同年代梭梭(Haloxylon ammodendron)叶功能性状为研究对象,对不同年代梭梭叶功能性状变化规律及其与土壤因子的关系进行研究,旨在揭示梭梭对干旱荒漠区土壤环境的适应策略。结果表明:1)除叶绿素含量、叶全碳含量与叶全磷含量外,不同年代梭梭叶功能性状指标均表现出显著差异(P<0.05)。除叶全钾含量和比叶面积属中等变异外,其他叶功能性状均属弱变异。2)梭梭叶功能性状间存在一定的相关性;叶片含水量、叶饱和含水量与叶绿素含量可作为梭梭叶功能性状随年代变化的主要指标。3)土壤含水量、电导率与pH是影响不同年代梭梭叶功能性状的主要土壤因子。随着生长年限的延长,梭梭叶功能性状表现出不同的组合状况,且随着土壤因子变化表现出相应的适应策略,反映出梭梭叶片具有较强的可塑性,有利于适应民勤干旱荒漠生态环境。In this study,we analyzed the variations in leaf functional traits of differently-aged Haloxylon ammodendron in Minqin,and further studied their relationship with soil factors.This analysis allows us to better understand the adaptation strategies of H.ammodendron to the soil environment in arid desert areas.Our results showed that:1)Except for chlorophyll content,leaf total carbon content and leaf total phosphorus content,the leaf functional traits of different-aged H.ammodendron showed significant differences(P<0.05).Except for leaf total potassium content and specific leaf area,which showed moderate variation,other leaf functional traits showed only weak variation.2)The leaf functional traits of H.ammodendron were correlated;the leaf water content,leaf saturated water content and chlorophyll content could be used as the main indices of leaf functional traits of H.ammodendron with the change in time.3)Soil moisture content,electrical conductivity and pH were the main soil factors affecting the leaf functional traits of different-aged H.ammodendron.The functional traits of H.ammodendron showed different combinations with an increase in age.Corresponding adaptive strategies to the change in soil factors were also found,which indicate that H.ammodendron leaves have strong plasticity,conducive to adaptation to the arid desert ecological environment in Minqin.

关 键 词：梭梭 叶功能性状 土壤因子 民勤 

分 类 号：Q948[生物学—植物学]