干旱区生态环境知识资源中心(Arid): 水分胁迫对5个沙柳种源苗木水势和蒸腾耗水的影响

Arid

	水分胁迫对5个沙柳种源苗木水势和蒸腾耗水的影响
其他题名	Effect of different water supply on water potentinal and transpiring water-consumption of five Salix psammophila provenances
	赵燕 1; 李吉跃 1; 刘海燕 1; 黄看看 1; 李佳 2
ISSN	1000-1522
出版年	2008
卷号	30 期号:5 页码:19-25
中文摘要	采用BP3400精密天平等仪器研究了不同浇水量5个沙柳种源的日蒸腾耗水量,用压力室法测定了苗木的叶水势,得出了苗木在不同浇水量情况下水势和蒸腾耗水的变化规律。结果表明,5个沙柳种源苗木随着水分胁迫的加重,水势逐渐降低;在相同的水分条件下,不同种源的苗木有不同的蒸腾耗水量,相同种源苗木的蒸腾耗水量随着水分胁迫的加重而减少,严重水分胁迫时日耗水总量较充分供水时下降了63.57%（榆林种源）、67.89%（乌审旗种源）、68.26%（民勤种源）、59.58%（达拉特旗种源）和58.03%（盐池种源）,其中民勤种源降幅最大。通过研究苗木在不同的浇水量条件下的水势和蒸腾耗水规律,为干旱沙区选择耐旱性较强的沙柳种源提供依据。
英文摘要	Daily changes in transpiring water-consumption of five Salix psammophila provenances under the condition of different water supply were studied by BP3400 precision balance, etc. Leaf water potential was measured using pressure chamber and water potential and the water-consumption patterns of seedlings under the condition of different water-supply were observed. The results show that water potential of five provenances decreased with declining water supply and seedlings of different provenances had different water consumptions in the same water status. The water consumption of seedlings decreased with increasing drought stress, while water-consumption rate of five provenances decreased with declining water supply. When the seedlings were in serious drought stress, the daily amount of water consumption decreased by 63.57% （Yulin provenance）, 67.89 % （Wushenqi provenance）, 68.26 % （ Minqin provenance）, 59.28 % （ Dalateqi provenance）, 58.03 % （Yanchi provenance）of those in sufficient water supply and that of Minqin provenance decreased the most. By studing water potential and the water-consumption patterns of seedlings under the condition of different water- supply,it may be beneficial to choose Salix psammophila provenance with strong drought tolerance in arid desert regions.
中文关键词	沙柳 ; 浇水量 ; 种源 ; 耗水量
英文关键词	Salix psammophila water supply provenance water consumption
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:3379074
来源机构	北京林业大学 ; 西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222011
作者单位	1.北京林业大学, 北京省部共建森林培育与保护教育部重点实验室, 100083; 2.西北农林科技大学林学院
推荐引用方式 GB/T 7714	赵燕,李吉跃,刘海燕,等. 水分胁迫对5个沙柳种源苗木水势和蒸腾耗水的影响[J]. 北京林业大学, 西北农林科技大学,2008,30(5):19-25.
APA	赵燕,李吉跃,刘海燕,黄看看,&李佳.(2008).水分胁迫对5个沙柳种源苗木水势和蒸腾耗水的影响.,30(5),19-25.
MLA	赵燕,et al."水分胁迫对5个沙柳种源苗木水势和蒸腾耗水的影响".30.5(2008):19-25.