干旱区生态环境知识资源中心(Arid): 干旱下保水剂对橡胶苗叶绿素荧光参数的影响

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	干旱下保水剂对橡胶苗叶绿素荧光参数的影响
其他题名	Effects of Water-retaining Agent on Chlorophyll alpha Fluorescence Parameters of Hevea brasiliensis Under Drought Stress
	姚庆群; 谢贵水; 陈海坚
ISSN	1000-2561
出版年	2006
卷号	27 期号:1 页码:6-11
中文摘要	研究了保水剂对干旱胁迫下巴西橡胶（Hevea brasiliensis）苗叶绿素荧光动力学参数的影响。结果表明，在干旱胁迫下橡胶苗叶绿素a荧光动力学参数Fv／Fm，ETR，qP均有所下降，qN先上升后下降，且随着保水剂用量增大，下降程度减小，即保水剂用量越大，对橡胶苗干旱胁迫的缓解作用越大。不同水平的保水剂处理对橡胶叶绿素荧光参数的影响达到显著水平。多重比较结果表明，沙壤土和沙壤土＋30％（体积分数）椰糠中的保水剂用量分别不低于0．2％（质量分数）和不低于0．1％（质量分数）时才能有效地发挥抗旱作用。
英文摘要	The effects of water-retaining agent on chlorophyll alpha fluorescence parameters of Hevea brasiliensis were studied under drought stress. Seedlings of 6 months old were used in the experiments. Two kinds of soil matrix （silty loan and silty loan＋30 %coir dust） with 5 different levels of the water-retaining agent were used as planting media. The .seedlings were planted under the normal condition with open air, and they were dry treated after four months later under rainproof conditions until some seedlings died because of drought. During drought stress, chlorophyll alpha fluorescence parameters were measured by Li-6400-40 （leaf chamber fluorometer）. Results showed that Hevea chlorophyll alpha fluorescence dynamic parameters Fv/Fm didn＇uehange at first, but decreased 20 days later; ETR and qP decreased gradually; qN increased at first and then decreased fast after 20 days later. The experiment indicated that the more volume of water-retaining agent used in the soil matrix, the less H. brasiliensis chlorophyll alpha fluorescence parameters dropped. Multi-comparative results showed that the water-retaining agent had clear effect on H. brasiliensis only when its application rate was not less than 0.2 % in silty loan and 0.1% in silty loan＋30 % coir dust. This suggested that the water-retaining agent could alleviate the stress of drought on H. brasiliensis, and could be applied in drought and semi-arid region.
中文关键词	干旱胁迫 ; 保水剂 ; 叶绿素荧光 ; 巴西橡胶
英文关键词	rought stress water-retaining agent fluorescence parameters Hevea brasiliensis
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:2297021
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220002
作者单位	中国热带农业科学院橡胶栽培研究所, 农业部热带作物栽培生理学重点实验室, 儋州, 海南 571737, 中国
推荐引用方式 GB/T 7714	姚庆群,谢贵水,陈海坚. 干旱下保水剂对橡胶苗叶绿素荧光参数的影响[J],2006,27(1):6-11.
APA	姚庆群,谢贵水,&陈海坚.(2006).干旱下保水剂对橡胶苗叶绿素荧光参数的影响.,27(1),6-11.
MLA	姚庆群,et al."干旱下保水剂对橡胶苗叶绿素荧光参数的影响".27.1(2006):6-11.