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| Response of grapes growth by alternate partial root-zone drip irrigation |
| Wang Weihua1, Li Shuqin2, Wu Zhongdong3 |
| 1.Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; 2.Zibo Water Conservancy Exploration & Design Institute, Zibo, Shandong 255049, China; 3.School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, Shandong 255049, China |
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Abstract As the shortage of water resources in the extreme arid region, field experiments of grapes were studied, and alternate partial root zone drip irrigation mode was considered to analyze the grape ecological indicators and water distribution on root zone. The results show that the changes of grape shoot relative growth rate and leaf area index with time can be described by Logistic model. The leaf area indexes of alternate drip irrigation and conventional drip irrigation don't have significant differences analyzed by single factor analysis of variance. That means no significant effect of alternate drip irrigation on the main organ of plant namely the grape leaf exists. Under the joint action of soil evaporation, root absorption, gravitational potential and the water potential gradient, soil moistures of furrow and ridge raise alternately by alternate drip irrigation. And the change of soil moisture can be mainly found in the 0-60 cm soil layer. Results show that, water consumption and soil evaporation of grape irritated by alternate drip irrigation were less than by conventional drip irrigation, and the efficiency of water utilization was improved at the same time. The study provides scientific references for the water saving irrigation in extremely arid areas.
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Received: 12 October 2013
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