| Research on quality evaluation index of irrigation water on spring wheat in arid areas with ridge tillage and furrow irrigation |
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| DOI：10.7606/j.issn.1000-7601.2016.02.40 |
| Key Words: furrow irrigation water quality evaluation spring wheat yield water use efficiency |
| Author Name | Affiliation | | SUN Ke-cui | College of Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHANG Xin-min | Research Institute of Water and Soil Conservation of Gansu, Lanzhou, Gansu 730020, China | | JIN Jian-xin | Ningxia Academy of Agriculture and Forestry, Yinchuan, Ningxia 750002, China | | WANG Wen-juan | Gansu Research Institute for Water Conservancy, Lanzhou, Gansu 730000, China | | WANG Xue-miao | College of Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In order to improve the irrigation quality on spring wheat in arid areas by furrow irrigation, the optimization model for irrigation technical parameters had been established. The research was conducted through five combinations between furrow parameters (ridge slope, ridge width, groove depth and groove width) and irrigation technical parameters (groove length, ditch slope and ditch inflow). Eventually influences on the evaluation indexes of irrigation water quality, the yield, and water use efficiency of ridge culture wheat were observed by furrow irrigation. The result showed that as exemplified by the first irrigation, under the condition of invariable parameters such as surface slope and furrow type, with the growth of the ditch flow, the lateral irrigation uniformity (LIU) of 10 m measuring points by T1, T2, T4 and T5 were decreased by 5.05%, 10.1%, 4.04% and 9.09% from that by T3 treatment, and LIU at 30 m measuring points by T1, T2, T4 and T5 was decreased by 7.96%, 11.8%, 2.15% and 10.75% from that by T3 treatment, respectively. A negative growth between the slope of the field surface and the irrigation uniformity of each point was observed. Moreover, the average water utilization by T4 treatment was the highest, increased by 4.76%, 5.94%, 0.36% and 2.9% from that by T1, T2, T3 and T5. It was further found that the parameter combination (groove length 50m, ridge width 40 cm, water volume 1.5 L·s-1 into the furrows, the slope of field 1/1000) was optimal for the growth of wheat. Under such condition, the average water utilization was 85.3%, the yield of wheat was 9 142.87 kg·hm-2 and the water use efficiency was 29.18 kg·hm-2·mm-1, all reaching the highest. |
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