干旱区生态环境知识资源中心(Arid): Effects of deficit irrigation on daily and seasonal variations of trunk sap flow and its growth in Calligonum arborescens

Arid

	Effects of deficit irrigation on daily and seasonal variations of trunk sap flow and its growth in Calligonum arborescens
	Shan Lishan; Li Yi; Zhao Ruifeng; Zhang Ximing
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2013
卷号	5 期号:2 页码:233-243
英文摘要	Water deficit in arid and semiarid regions affects whole-plant sap flow and leaf-level water relations. The objectives of this study were to clarify how sap flow of Calligonum arborescens responds to different drought stress conditions and to understand its acclimation mechanism to drought environments. A field experiment was conducted for C. arborescens during the growing season to evaluate the effects of deficit irrigation on the daily and seasonal variations of trunk sap flow in the shelterbelt along the Tarim Desert Highway, Xinjiang, China. Three different water regimes (2,380, 1,960 and 1,225 m~3 /hm~2 ) were applied at different stages of plant growth. From 1 May to 30 October 2007, a heat-balance stem flow gauge was used to monitor the sap flow dynamics of C. arborescens under different water regimes. Atmospheric evaporation demand and soil moisture conditions for differentially irrigated C. arborescens were also monitored. The result showed that sap flow exhibited a clear diurnal pattern regardless of treatments; the diurnal patterns of sap flow and vapour pressure deficit were very similar under different water regimes and growing seasons, while the slope of the linear regression of this correlation confirmed an increasing water regime. The sap flow decreased under reduced water regimes and there was nocturnal sap flow regardless of water regimes, which was mainly contributed to nocturnal transpiration and water recharge. The sap flow peaked before midnight and dropped afterwards with obviously higher values in summer than in other seasons. It is speculated that the water consumption of C. arborescens during the day can be supplemented through the sap flow at night, which increased with increasing irrigation amount. Net radiation was the most significant correlated factor that influenced sap flow velocity and transpiration under different water regimes (R~2 >0.719). Compared with the commonly practiced water regime, the growth of C. arborescens was significantly slower in the stress deficit irrigation, but not significantly different from that in the moderate deficit irrigation. The moderate deficit irrigation would not affect the stability of the shelterbelt and was a more efficient use of water resources compared with the current watering amount.
英文关键词	Calligonum arborescens sap flow environmental factor growth parameter Tarim Desert Highway
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:4906453
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335248
作者单位	Shan Lishan, Forestry Department, Gansu Agricultural University, Lanzhou, Gansu 730070, China.; Li Yi, Forestry Department, Gansu Agricultural University, Lanzhou, Gansu 730070, China.; Zhao Ruifeng, College of Geography and Environment Science, Northwest Normal University, Lanzhou, Gansu 730070, China.; Zhang Ximing, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China.
推荐引用方式 GB/T 7714	Shan Lishan,Li Yi,Zhao Ruifeng,et al. Effects of deficit irrigation on daily and seasonal variations of trunk sap flow and its growth in Calligonum arborescens[J],2013,5(2):233-243.
APA	Shan Lishan,Li Yi,Zhao Ruifeng,&Zhang Ximing.(2013).Effects of deficit irrigation on daily and seasonal variations of trunk sap flow and its growth in Calligonum arborescens.Journal of Arid Land,5(2),233-243.
MLA	Shan Lishan,et al."Effects of deficit irrigation on daily and seasonal variations of trunk sap flow and its growth in Calligonum arborescens".Journal of Arid Land 5.2(2013):233-243.