干旱区生态环境知识资源中心(Arid): 沙棘苗期叶水势与气孔导度对水分胁迫的响应

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	沙棘苗期叶水势与气孔导度对水分胁迫的响应
其他题名	Response of Leaf Water Potential and Stomatal Conductance of Sea-buckthorn to Water Stress During Seedling Stage
	郭冰寒; 王若水; 肖辉杰
来源期刊	核农学报
ISSN	1000-8551
出版年	2018
卷号	32 期号:3 页码:609-616
中文摘要	为研究沙棘苗期叶水势和气孔导度对不同程度水分胁迫的响应规律,本研究通过盆栽控水试验,以1年生沙棘实生苗为试验材料,设置了4种土壤田间含水量: 75% ~ 80% (W_1,充分供水) 、55% ~ 60%(W_2,轻度水分胁迫) 、35% ~ 40% (W_3,中度水分胁迫) 、25% ~ 30% (W_4,重度水分胁迫),选择晴朗无风的天气,于6: 00-18: 00每隔2 h测量叶水势、气孔导度(Gs) 、气象因子和叶温。结果表明,各处理日平均叶水势差异显著(P < 0.05): W_1 (-1.77 MPa) > W_2 (-1.90 MPa) > W_3 (-2.11 MPa) > W_4 (-2.34 MPa) 。沙棘日平均叶水势与土壤含水量,平均叶水势与气孔导度均呈显著线性正相关关系(P< 0.05) 。本研究结果有助于进一步认识沙棘苗期的抗旱机理,为西北荒漠地区沙棘造林提供技术支撑。
英文摘要	In order to study the response of leaf water potential and stomatal conductance to different degree of water stress in sea-buckthorn at the seedling stage,four kinds of soil water content were set up by potted water control experiment with 1 year old sea-buckthorn seedling,which were 75% ~ 80% of field capacity (W_1,full water supply),55% ~ 60% of field capacity (W_2,light water stress),35% ~ 40% of field capacity (W_3,medial water stress),25% ~ 30% of field capacity (W_4,severe water stress). The leaf water potential,stomatal conductance,leaf temperature and meteorological factors were measured every 2 hours from 6: 00 to 18: 00 in cloudless and windless days. The results showed that the difference in leaf water potentials of four treatments was significant (P < 0.05),following the order of W_1 (-1.77MPa) > W_2 (-1.90MPa) > W_3 (-2.11MPa) > W_4 (-2.34MPa). Moreover,positive linear correlation was found between the mean values of leaf water potential and soil water content (P < 0.05). The values of stomatal conductance and leaf water potential had a significant linear correlation (P < 0.05). The study contributes to better understanding on drought resistance mechanism of sea-buckthorn and provides technical support for sea-buckthorn afforestation in the northwest desert region.
中文关键词	水分胁迫 ; 沙棘 ; 叶水势 ; 气孔导度 ; 土壤含水量
英文关键词	water stress sea-buckthorn leaf water potential stomatal conductance soil water content
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:6176642
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237821
作者单位	北京林业大学水土保持学院, 北京 100083, 中国
推荐引用方式 GB/T 7714	郭冰寒,王若水,肖辉杰. 沙棘苗期叶水势与气孔导度对水分胁迫的响应[J]. 北京林业大学,2018,32(3):609-616.
APA	郭冰寒,王若水,&肖辉杰.(2018).沙棘苗期叶水势与气孔导度对水分胁迫的响应.核农学报,32(3),609-616.
MLA	郭冰寒,et al."沙棘苗期叶水势与气孔导度对水分胁迫的响应".核农学报 32.3(2018):609-616.