| 生物土壤与生态 |
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| Ecophysiological Responses of Calligonum arborescens Litv. to Irrigation Volume in the Hinterland of the Taklimakan Desert |
| LIANG Shao-min1,2,3, ZHANG Xi-ming1, ZENG Fan-jiang1,2, ZHANG Zhong-wu4, QIU Shi-ke3, YAN Hai-long1,3 |
| 1.Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 2.Cele National Field science Observation and Research Station for Desert-Grass Land Ecology, Cele 848300, Xinjiang, China; 3.Institute of Geography, Henan Academy of Sciences, Zhengzhou 450052, China; 4.Collage of Urban and Environment Sciences, Shanxi Normal University, Linfen 041000, Shanxi, China |
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Abstract We studied the physiological characteristics and growth rate of Clligonum. arborescens and the soil moisture under different irrigation volumes in the shelterbelts along the Tarim Desert Highway in hinterland of the Taklimakan Desert. The results showed: (1) Under irrigation volume of 35, 24.5 and 14 kg per plant once, the depth that soil moisture changed are 0—200, 0—160 cm and 0—100 cm respectively. When the soil moisture around root is between3% and 4%, the plant can grow normally, but the plant will suffer water stress if the soil moisture is lower than 2.5%. (2) Water potential of C.arborescens in predawn and afternoon reduces with time lapsing after irrigation, and the fall amount of water potential is more during the fore part. Water potential falls more fast with less irrigation. Especially, the water potential in predawn and afternoon reaches -1.3 MPa and -2.19 MPa respectively just three days after irrigation of 14 kg per plant once. (3) The average daily water consumption and sap flow rate of C. raborescens reduce sharply during less irrigation volume. Diurnal variation of sap flow rate is double-peaked curve at the 15th day after irrigation of 24.5 and 14 kg per plant once. Diurnal variation of sap flow under three treatments is double-peaked curve until the 25th day. (4) The stem diameter, twig length, twig diameter and growth of C.raborescens decrease with the decreasing of irrigation volume. The effect of irrigation volume on the twig length is especially significant(P=0.05).
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Received: 23 October 2009
Published: 20 November 2010
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Cite this article:
LIANG Shao-min;;ZHANG Xi-ming;ZENG Fan-jiang;ZHANG Zhong-wu;QIU Shi-ke;YAN Hai-long;. Ecophysiological Responses of Calligonum arborescens Litv. to Irrigation Volume in the Hinterland of the Taklimakan Desert. JOURNAL OF DESERT RESEARCH, 2010, 30(6): 1348-1353.
URL:
http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2010/V30/I6/1348
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2010, Vol. 30 
