干旱区生态环境知识资源中心(Arid): 荒漠生境下柠条幼苗存活与生长对水分添加和沙埋的响应

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	荒漠生境下柠条幼苗存活与生长对水分添加和沙埋的响应
其他题名	Responses of survival and growth of Caragana korshinskii seedlings to water addition and sand burial
	罗永红; 闫兴富; 孙毅; 张金峰
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2018
卷号	37 期号:5 页码:1382-1390
中文摘要	为了解柠条幼苗生长与存活对荒漠生境下沙埋和水分添加的响应,在宁夏灵武白芨滩国家级自然保护区南部荒漠灌丛群落,通过水分添加和持续沙埋处理,研究了柠条幼苗的存活与生长对水分添加和沙埋的响应。结果表明:水分添加有利于柠条幼苗的存活与生长,幼苗最终留存率显著提高(P<0.05),且幼苗株高、单株叶面积和总干质量显著增大(P<0.05),侧根数、小叶数、相对生长率和净同化率也均有不同程度增大。沙埋抑制柠条幼苗的存活与生长,试验结束时,沙埋幼苗在水分添加条件下的最终留存率显著低于无沙埋幼苗(P<0.05);除株高外,沙埋幼苗的基径、小叶数、单株叶面积、总干质量、相对生长率等均显著减小(P<0.05),主根长、侧根数和净同化率也不同程度减小。沙埋幼苗的比叶面积、比根长和比枝长均显著大于无沙埋幼苗(P<0.05),但前者的根冠比显著小于后者(P<0.05);沙埋幼苗的比根长在水分添加条件下显著减小(P<0.05),但不论是否沙埋,幼苗根冠比、比叶面积和比枝长在有无水分添加间均差异不显著。
英文摘要	To understand the adaptive strategies of growth and survival of Caragana korshinskii seedlings to sand burial and water availability in desert,an experiment was conducted in a desert shrubland in Lingwu Baijitan National Nature Reserve of Ningxia. The results showed that water addition facilitated the survival and growth of C. korshinskii seedlings. The final retention rate (FRR),shoot height (SH),leaf area per plant (LAPP) and total dry mass (TDM) of seedlings all significantly increased under water addition (P<0.05). Moreover,lateral root number (LRN),leaflet blade number (LBN),relative growth rate (RGR) and net assimilation rate (NAR) all increased to some extent. The survival and growth of C. korshinskii seedlings were inhibited by sand burial. The FRRs of seedlings with water addition were significantly higher than that without water addition by the end of the experiment (P<0.05). Basal stem diameter,LBN, LAPP,TDM,RGR of sand buried seedlings significantly decreased (P<0.05),but it was not the case for SH. The taproot length,LRN and NAR of seedlings declined in various degrees. The specific leaf area (SLA),specific root length (SRL) and specific shoot length (SSL) of sand buried seedlings were significantly higher than those without sand burial (P<0.05),while root shoot ratio (RSR) of the former was substantially lower than the latter (P<0.05). The SRL of sand buried seedlings significantly declined under water addition (P<0.05). No significant difference in RSR,SLA and SSL of seedlings,however,were detected between treatments of water addition and no water addition regardless of sand burial.
中文关键词	柠条 ; 水分添加 ; 持续沙埋 ; 幼苗存活 ; 幼苗生长 ; 形态学可塑性
英文关键词	Caragana korshinskii water addition persistent sand burial seedling survival seedling growth morphological plasticity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:6238861
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238188
作者单位	北方民族大学生物科学与工程学院, 国家民委生态系统模型及应用重点实验室, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	罗永红,闫兴富,孙毅,等. 荒漠生境下柠条幼苗存活与生长对水分添加和沙埋的响应[J],2018,37(5):1382-1390.
APA	罗永红,闫兴富,孙毅,&张金峰.(2018).荒漠生境下柠条幼苗存活与生长对水分添加和沙埋的响应.生态学杂志,37(5),1382-1390.
MLA	罗永红,et al."荒漠生境下柠条幼苗存活与生长对水分添加和沙埋的响应".生态学杂志 37.5(2018):1382-1390.