| 摘要: |
| 【目的】探究再生水滴灌不同灌溉定额对黄瓜光合作用、产量与品质的影响规律。【方法】采用随机区组对比试验方法，分析了再生水处理与自来水对照的不同灌溉定额（1 890、2 835与3 780 m3/hm2）对黄瓜光合作用、产量与品质的影响。【结果】①黄瓜4个光合指标（净光合速率、蒸腾速率、气孔导度与胞间CO2摩尔分数）及SPAD值与产量均随着灌溉定额的增加而增大，而群体水分利用效率则随着灌溉定额的增加而降低。相同灌溉定额再生水处理比自来水对照的黄瓜4个光合作用指标及SPAD值平均值分别增加7.32%、2.99%、4.19%、3.07%与5.54%，产量与群体水分利用效率平均值分别增加8.9%与8.86%；②黄瓜可溶性糖与可溶性固形物质量分数随着灌溉定额的增加而减小，而维生素C与总酸质量分数随着灌溉定额的增加而增加；再生水处理比自来水对照的维生素C量、可溶性糖与可溶性固形物量平均值分别增加1.14%、12.64%与5.8%，黄瓜总酸量平均值降低8.72%。【结论】黄瓜SPAD值与光合作用指标最大，产量最高，品质适宜的处理为再生水高水处理Z3，即灌溉定额为3 780 m3/hm2，相应的灌水定额为180 m3/hm2，灌水次数为21次。 |
| 关键词: 再生水；滴灌；黄瓜；光合作用；品质；水分生产效率 |
| DOI：10.13522/j.cnki.ggps.20190263 |
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| The Effects of Drip Irrigation with Reclaimed Wastewater on Chlorophyll, Photosynthesis, Yield and Quality of Cucumber |
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WANG Lulu, TIAN Juncang, XU Guihong, SHENG Hui, YAN Xinfang
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1. School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China; 2. Engineering Technology Research Center of Water-Saving and Water Resource Regulation in Ningxia, Yinchuan, China; 3. Engineering Research Center for Efficient Utilization of Modern Agricultural Water Resources in Arid Regions, Ministry of Education, Yinchuan 750021, China
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| Abstract: |
| 【Objective】Irrigating with treated domestic and urban wastewaters has been in increase over the past decade and the purpose of this paper is to investigate the effects of irrigation amount and scheduling on photosynthetic traits, yield and quality of cucumber.【Method】We compared three irrigation amounts: 1 890 m3/hm2, 2 835 m3/hm2 and 3 780 m3/hm2, with each having a control that was irrigation with the same amount of clean water. In each treatment, we measured photosynthetic traits, chlorophyll content and yield. 【Result】In all treatments and controls, the four photosynthetic traits - net photosynthetic rate, transpiration rate, stomatal conductance and intercellular carbon dioxide concentration - as well as the chlorophyll content and yield all increased with the irrigation amount, while the “grouped” water use efficiency decreased inversely with the irrigation amount. When the irrigation amount was the same, irrigating with reclaimed wastewater increased average of the four photosynthetic indexes and chlorophyll content by 7.32%, 2.99%, 4.19%, 3.07% and 5.54%, and the average of “grouped” yield and water use efficiency by 8.9%. 8.86% respectively, compared with the controls. As irrigation amount increased, the soluble sugar and solids content of the fruits decreased while the vitamin C and total acid mass fraction increased. When the irrigation amount was the same, irrigating with reclaimed wastewater increased the average vitamin C content, soluble sugar content and soluble solids content by 1.14%, 12.64% and 5.8% respectively, while reduced the average total acid content of the fruit by 8.72%, compared to the controls. 【Conclusion】In terms of photosynthetic indexes and yield, the optimal irrigation scheduling for the reclaimed wastewater was: Irrigating 3 780 m3/hm2 of water in 21 times with each irrigation being180 m3/hm2. |
| Key words: reclaimed wastewater; drip irrigation; cucumber; photosynthesis; fruit quality; water use efficiency |
