基于DSSAT模型陕西杨凌不同降水年型冬小麦灌溉制度研究

王文佳<sup>1; 2; 3</sup>; 冯浩<sup>3; 4; 5</sup>; 宋献方<sup
>1</sup>

Determination of irrigation schedule of winter wheat in different hydrological years in Yangling, Shaanxi Province based on DSSAT model

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DOI：10.7606/j.issn.1000-7601.2013.04.001

Key Words: DSSAT model water-saving irrigation winter wheat Central Shaanxi

Author Name

Affiliation

WANG Wen-jia^1,2,3, FENG Hao^3,4,5, SONG Xian -fang¹

（1.中国科学院地理科学与资源研究所陆地水循环及地表过程重点实验室，北京 100101； 2.中国科学院研究生院, 北京 100049；3.中国科学院水利部水土保持研究所，陕西杨凌 712100； 4.西北农林科技大学中国旱区节水农业研究院，陕西杨凌 712100；5.西北农林科技大学旱区农业水土工程教育部重点实验室，陕西杨凌 712100）

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Abstract:

In the arid and semiarid areas of northwest China, the land, light and heat resources are relatively rich but water resource is much short. Water is the main limiting factor in exploring the productive potential of light and temperature in these areas. In order to realize highly efficient agricultural production and sustainable development, it is essential to raise the use efficiency of water resource according to the water requirement and water-stress response of crops in different growing stages. By using DSSAT model, the productive potential of winter wheat in different hydrological years in Yangli ng, Shaanxi Province was simulated, the effects of irrigation in different stages on yield, WUE and soil evaporation were analyzed, and the key irrigation periods were determined. Furthermore, the optimal irrigation schedule of winter wheat in different hydrological years was made by considering yield, WUE, total irrigation amount and irrigation times comprehensively. The results showed: (1) A mong the four times of irrigation during the growing period of winter wheat, revival water was most critical, next was jointing water, and winter water and grain filling water were the last. When there was no revival water, the yield and transpiration of winter wheat were decreased significantly, and the soil evaporation was increased significantly. (2) There were also remarkable differences among different hydrological years. The yield, WUE and crop transpiration in wet years were slightly higher than those in normal years, and both of them were significantly higher than those in dry years. As for the marginal benefit of irrigation, different hydrological years were ranked as: normal years＞dry years＞wet years. (3) The optimal irrigation schedule of winter wheat in different hydrological years was: 75 mm of revival water and 50 mm of jointing water in dry years, 75 mm of revival water in normal years, and 25 mm of revival water and 25 mm of jointing water in wet years.