| Evapotranspiration in a drip-irrigated winter wheat field in Northern Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2016.01.05 |
| Key Words: Northern Xinjiang drip-irrigated winter wheat evapotranspiration evaporation |
| Author Name | Affiliation | | LI Jie | College of Agronomy, Shihezi University, Key Laboratory of Oasis Ecological Agriculture of Xinjiang Bingtuan, Shiheizi, Xinjiang 832003, China | | CHEN Rui | College of Agronomy, Shihezi University, Key Laboratory of Oasis Ecological Agriculture of Xinjiang Bingtuan, Shiheizi, Xinjiang 832003, China | | WU Yang-huan | College of Agronomy, Shihezi University, Key Laboratory of Oasis Ecological Agriculture of Xinjiang Bingtuan, Shiheizi, Xinjiang 832003, China | | YANG Ping | College of Agronomy, Shihezi University, Key Laboratory of Oasis Ecological Agriculture of Xinjiang Bingtuan, Shiheizi, Xinjiang 832003, China | | CUI Jin | College of Agronomy, Shihezi University, Key Laboratory of Oasis Ecological Agriculture of Xinjiang Bingtuan, Shiheizi, Xinjiang 832003, China | | JIA Biao | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | ZHENG Zhong | College of Agronomy, Shihezi University, Key Laboratory of Oasis Ecological Agriculture of Xinjiang Bingtuan, Shiheizi, Xinjiang 832003, China | | MA Fu-yu | College of Agronomy, Shihezi University, Key Laboratory of Oasis Ecological Agriculture of Xinjiang Bingtuan, Shiheizi, Xinjiang 832003, China |
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| Abstract: |
| Micro-lysimeters and a large weighing lysimeter were used to measure evapotranspiration (ET) of a drip-irrigated winter wheat field at the Irrigation Experimental Station of Shihezi University. The treatments of irrigation amount (W1=375 mm, W2=600 mm, and W3=750 mm) were conducted in order to develop an efficient drip irrigation system in Xinjiang. The results showed that winter wheat yield increased significantly as the irrigation amount increased; however the difference in yield between W2 treatment (8 450 kg·hm-2) and W3 treatment (8 670 kg·hm-2) was not significant. W2 treatment had the highest water use efficiency (1.4 kg·m-3) in this study, being significantly higher than that in W3 treatment and W1 treatment. Total ET increased as the irrigation amount increased. Total ET varied between 412.3 mm and 707.6 mm. Depending on the treatment and the year, soil evaporation accounted for 27.9% to 29.1% of the total ET. The water content of the surface soil and the leaf area index of the wheat crop both had significant effects on evaporation. Furthermore, both variables were exponentially related to the proportion of irrigation water that evaporated from the soil. The amounts of water consumption to obtain high winter wheat yields were as follows: seeding to overwintering, 1.0 mm·d-1; overwintering to regreening, 0.3 mm·d-1; regreening to jointing, 2.6 mm·d-1; jointing to heading, 6.3 mm·d-1; heading to milk, 6.6 mm·d-1; and milk to maturity, 6.2 mm·d-1 |
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