| Optimization model of agricultural planting structure under water-saving irrigation technology |
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| DOI：10.7606/j.issn.1000-7601.2019.03.13 |
| Key Words: agricultural planting structure optimization model mulched drip irrigation economic benefit ecological environment condition index Shihezi irrigation area |
| Author Name | Affiliation | | LI Yue | College of Water and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China | | WANG Chun-xia | College of Water and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China | | HE Xin-lin | College of Water and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China |
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| Abstract: |
| In the past, the research on the optimization of planting structure usually takes the economic benefit as the main applicable condition, and the side severity of ecological benefit is low, which is not suitable for the northwest region with fragile ecological environment. Based on water-saving irrigation technology, an optimization model of agricultural planting structure was constructed. The model took the Shihezi irrigation area in Xinjiang as the research area, with the highest economic benefit under the different irrigation techniques as the target. The comprehensive eco-environmental condition index was added to the conventional constraints such as total agricultural planting area and water consumption for agricultural planting, and the ecological benefits of the optimized results were evaluated, and a linear programming model was established. The results showed that, with the decrease of the proportion of drip irrigation under mulch, the total area of agricultural planting decreased to 28,300 hm2 compared with the current year. When the proportion of application area of drip irrigation under mulch to total sowing area was 0.84 and 0.82, the economic benefit increased by 0.05% and decreased by 0.5%, respectively, which ensured the relative stability of economy. The comprehensive ecological environment index was 22.58 and 22.94, respectively, which was beneficial to the protection and improvement of ecological environment in oasis irrigation area. Under the application ratio of these two drip irrigation techniques, the main crop planting structure in irrigation area was optimized as follows: (1)Wheat 1 100.0 hm2, maize 2 373.3 hm2, cotton 17 286.7 hm2 and peach 728.0 hm2 under mulch drip irrigation; wheat 206.7 hm2, maize 453.3 hm2, cotton 3 293.3 hm2 and peach 140.0 hm2 under other irrigation techniques. （2）Wheat 1 073.3 hm2, maize 2 320.0 hm2, cotton 16 713.3 hm2 and peach 710.7 hm2 under mulch drip irrgation; wheat 233.3 hm2, maize 506.7 hm2, cotton 3 666.7 hm2 and peach 153.3 hm2 under other irrigation techniques. |
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