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| DOI：10.13522/j.cnki.ggps.2016.0266 |
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| Effect of Irrigation with Slight Saline Water on Photosynthesis Characteristics and Yield of Winter Wheat |
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PANG Guibin, XU Zhenghe, WANG Haixia , ZHANG Lizhi, WANG Tianyu
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College of Resources and Environment, University of Jinan, Jinan 250022, China; College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
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| Abstract: |
| 【Objective】Obtain the suitable alternative of saline water irrigation pattern and reveal the physiological and growth response mechanism for winter wheat. 【Method】A field experiment was conducted in Yellow River Delta, Shandong, North China. Four irrigation treatments (irrigating 80 mm with fresh water each at jointing and heading stages, irrigating 80 mm with fresh water each at jointing, heading and milking stages, irrigating 80 mm with fresh-saline water each at jointing and heading stages, irrigating 80 mm with fresh-saline-saline water each at jointing, heading and milking stages) were designed. The collected datum were used to analyze the effects of saline water irrigation on photosynthesis characteristics, biomass and yield of winter wheat. 【Result】The results showed that, compared with the treatment of fully irrigated with fresh water, brackish water irrigation decreased leaf stomatal conductance and transpiration rate of winter wheat, but no significant change was observed in net photosynthetic rate, thus leaf water use efficiency was increased by 2.8%~43.2%. While brackish water inhibited plant height and biomass of winter wheat, also yield decreased by 3%~13% and saved fresh water by 50%~67% under the treatment with fresh-saline water. Either fresh water or brackish water, irrigation was beneficial to grain filling at milking stages, the 1000-grain was weight increased, and also yield was increased by 11.2%~11.4%. 【Conclusion】Therefore, it is prospective to use fresh-saline-saline water irrigation mode of winter wheat in the region, which has important practical significance for the sustainable agriculture in the Yellow River Delta. |
| Key words: winter wheat; slight saline water irrigation; photosynthesis characteristics; leaf water use efficiency; yield |
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