干旱区生态环境知识资源中心(Arid): 野生赖草和垂穗披碱草抗旱能力比较

Arid

	野生赖草和垂穗披碱草抗旱能力比较
其他题名	Comparison of drought resistance of wild Leymus secalinus and Elymus nutans in Tibet
	张卫红 1; 刘大林 1; 苗彦军 2; 徐雅梅 2; 陈鸣晖 1; 邵将 1
来源期刊	草业科学
ISSN	1001-0629
出版年	2017
卷号	34 期号:6 页码:1255-1263
中文摘要	干旱是制约西藏牧草生长发育的一个重要因素,为此,本研究以西藏野生赖草(Leymus secalinus)和披碱草(Elymus nutans)作为试验材料,探究两种野生牧草抗旱能力的强弱,以期为西藏干旱半干旱区域生态恢复和栽培草地建植时草种的选择提供参考依据。结果表明,两种野生牧草的株高增长速率、植株含水量和叶绿素含量均随干旱时间的增加而降低(P < 0.05);丙二醛和游离脯氨酸含量随着干旱胁迫时间的增加而增加(P < 0.05)。赖草可溶性糖含量呈先减后增的变化趋势,而垂穗披碱草可溶性糖含量则呈减-增-减的变化趋势;可溶性蛋白含量均表现出先减后增的变化趋势。利用隶属函数{正相关函数模型F_1 = (X_i - X_(min))/(X_(max) - X_(min))和负相关函数模型F_2 =[1 - (X_i - X_(min))]/(X_(max) - X_(min))}法对两种野生牧草的两个生物学特性指标(植株含水量和株高)和5个生理特性指标(叶绿素、游离脯氨酸、丙二醛、可溶性糖和可溶性蛋白)进行综合评价,得出赖草的抗旱能力大于垂穗披碱草。
英文摘要	Drought is one of the most important factors restricting the growth and development of grasslands in Tibet. To counter these effects,we studied drought resistance ability in two species of wild forage plant,by collecting seeds of Leymus secalinus and Elymus nutans in Tibet,in order to provide reference for the ecological restoration of arid and semi-arid areas,and selection of grass species in artificial grassland. The results showed that the growth rate,plant water content, and chlorophyll content of two wild forage species decreased with the increase of drought time,and the difference was significant (P < 0.05). The contents of malondialdehyde and free proline increased with increase in drought time, and the difference was significant (P < 0.05). Soluble sugar content of L. massoniana decreased first and then increased,while the soluble sugar content of E. nutans decreased first and then increased,and finally decreased. The soluble protein content decreased first and then increased. The two biological characteristics and the five physiological characteristic indexes of the two wild forage species were comprehensively evaluated by the membership function method,and the drought resistance of L. secalinus was greater than that of E. nutans.
中文关键词	野生 ; 赖草 ; 垂穗披碱草 ; 形态特征 ; 生理指标 ; 抗旱能力 ; 隶属函数
英文关键词	wild Leymus secalinus Elymus nutans morphological characteristics physiological indicators drought resistance membership function
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6016621
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235667
作者单位	1.扬州大学动物科学与技术学院, 扬州, 江苏 225009, 中国; 2.西藏农牧学院, 林芝, 西藏 860000, 中国
推荐引用方式 GB/T 7714	张卫红,刘大林,苗彦军,等. 野生赖草和垂穗披碱草抗旱能力比较[J],2017,34(6):1255-1263.
APA	张卫红,刘大林,苗彦军,徐雅梅,陈鸣晖,&邵将.(2017).野生赖草和垂穗披碱草抗旱能力比较.草业科学,34(6),1255-1263.
MLA	张卫红,et al."野生赖草和垂穗披碱草抗旱能力比较".草业科学 34.6(2017):1255-1263.