几种旱生灌木种子萌发特性及化学成分  

Seed Germination Characteristics and Chemical Composition of Eight Xerophytic Shrub Species

作　　者：李茜[1] 任运涛[1] 牛得草[1] 张宝林 赵慧 傅华[1] 

机构地区：[1]兰州大学草地农业科技学院/草地农业生态系统国家重点实验室,甘肃兰州730020 [2]内蒙古阿拉善盟草原总站,内蒙古巴彦浩特750306 [3]内蒙古鄂尔多斯市水务局,内蒙古鄂尔多斯017000

出　　处：《中国沙漠》2015年第2期345-351,共7页Journal of Desert Research

基　　金：国家重点基础研究发展计划项目(2014CB138703);长江学者和创新团队发展计划项目(IRT13019);中国科学院战略性先导科技专项(XDA05050406-8);国家科技基础性工作专项(2012FY111900);国家自然科学基金项目(31070412;31201837);高等学校博士学科点专项科研基金项目(20120211110029)

摘　　要：研究了旱生灌木白沙蒿(Artemisia sphaerocephala)、红砂(Reaumuria soongorica)、梭梭(Haloxylon ammodendron)、羊柴(Hedysarum mongdicum)、霸王(Zygophyllum xanthoxylum)、白刺(Nitraria tangutorum)、沙冬青(Ammopiptanthus mongolicus)、柠条(Caragana korshinskii)种子的化学成分、适宜发芽条件下的吸水发芽特性及两者之间的关系,测定和计算了其发芽率、吸水率,淀粉、脂肪、蛋白质、碳(C)、氮(N)、磷(P)含量及C∶N、C∶P、N∶P值,并分析了这些指标间的相关性,以期归纳出西北干旱荒漠区植物种子萌发适应干旱环境的基本特性。结果表明:脂肪含量、蛋白质含量、氮含量与种子的最低萌发需水量之间呈显著正相关,而种子的单一化学成分及C∶N、C∶P、N∶P值并没有对发芽率形成显著影响。8种植物种子萌发对环境的适应机制大致可分为两类:需要外界较高水分供应,萌发迅速而集中;不需要外界较高水分的供应,萌发持续而分散。The purpose of this paper was to study the relationship between seedsgermination and the chemical components of eight xerophytic shrubs(Artemisia sphaerocephala,Reaumuria soongorica,Haloxylon ammodendron,Hedysarum mongdicum,Zygophyllum xanthoxylum,Nitraria tangutorum Bobr.,Ammopiptanthus mongolicus,Caragana korshinskii)in suitable germination conditions.These seeds' content of starch,fat,protein,carbon(C),nitrogen(N),phosphorus(P)and germination rate and water absorption were detected,while the C∶N∶P ratios were estimated.The results showed that fat content,protein content,nitrogen(N)content had a significant positive correlation to the lowest water content of seed germination,while the single chemical composition and C∶N∶P of seed had no significant effect on germination rate.We divided the mechanism which the 8 species of seeds adapt to the environment into two categories:one needs a higher moisture and germinated rapidly and intensively;the other one needs a lower moisture and germinated continuously and dispersedly.

关 键 词：旱生灌木 种子萌发 化学成分 

分 类 号：S718.4[农业科学—林学]