| Grape leaf water potential changes and their relationship with major ecological factors under drip irrigation in extreme arid region |
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| DOI：10.7606/j.issn.1000-7601.2011.05.25 |
| Key Words: grape leaf water potential soil water content ecological factor |
| Author Name | Affiliation | | LIU Hongbo | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China
Xinjiang Research Institute of Water Resources and Hydropower, Urumqi 830049, China | | BAI Yungang | Xinjiang Research Institute of Water Resources and Hydropower, Urumqi 830049, China | | ZHANG Jianghui | Xinjiang Research Institute of Water Resources and Hydropower, Urumqi 830049, China | | Hudan·Tumaerbai | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China |
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| Abstract: |
| In extremely dry conditions, with mature Thompson seedless grape as research material, drip irrigation technology was used to study the effects of different water treatments on vine leaf water potential variation and their relations with various ecological factors. The results showed that: the effects of different water treatments on leaf water potential are roughly at the same trend, highest in the early morning, lowest at noon, beginning to rise in the afternoon; in each treatment grape leaf water potential has positive correlation with soil moisture content, and it reaches a significant level in medium water (7 950 m3/hm2) treatment. Various ecological factors have different impact on leaf water potential in each treatment: relative atmospheric humidity is the most important factor influencing the daily change of grape leaf water potential in the control (27 000 m3/hm2) treatment and high water (14 775 m3/hm2) treatment; while air temperature has the most significant direct effect on the daily change of grape leaf water potential in the medium water and low water (5 850 m3/hm2) treatments; and relative atmospheric humidity has the greatest total effect in each treatment. |
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