| 王锋,康绍忠,王振昌.甘肃民勤荒漠绿洲区调亏灌溉对西瓜水分利用效率、产量与品质的影响[J].干旱地区农业研究,2007,(4):123~129 |
| 甘肃民勤荒漠绿洲区调亏灌溉对西瓜水分利用效率、产量与品质的影响 |
| Effects of regulated deficit irrigation on water use efficiency, yield and quality of watermelon in Minqin county of Gansu province |
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| DOI：10.7606/j.issn.1000-7601.2007.04.24 |
| 中文关键词: 调亏灌溉 西瓜 品质 水分利用效率 |
| 英文关键词:regulated deficit irrigation watermelon quality water use efficiency |
| 基金项目:国家自然科学基金项目（50339030）；国家“863”计划课题（2006AA100203） |
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| 中文摘要: |
| 2005～2006年在甘肃民勤地区对大田西瓜进行了调亏灌溉试验，结果表明：水分亏缺同时降低了土壤含水率和作物的蒸腾速率，土壤含水率的降低减少了作物的棵间蒸发，二者综合作用降低了土壤的水分消耗速率；开花-座果期的水分亏缺会同时降低西瓜的蒸腾速率、光合速率和单叶片水平的水分利用效率，并且最终会造成产量的下降；座果-膨大阶段轻度水分亏缺处理在复水后获得补偿生长的效应，产量高于充分灌水的对照；各调亏处理均不同程度提高了西瓜的Vc含量和可溶固形物浓度，其中以座果-膨大期进行水分亏缺的处理提高程度最大。综合考虑不同调亏处理对西瓜各项指标的影响，座果-膨大期轻度的水分亏缺不仅提高了果实的Vc含量和可溶固形物浓度，而且与对照相比，产量也有所提高，达到了大量节水而不减产，提高水分利用效率，改善果实品质的综合效应，是实施调亏灌溉的理想阶段。 |
| 英文摘要: |
| The regulated deficit irrigation experiment of watermelon conducted in Minqin county of Gansu province in 2005 and 2006 concluded that：water deficit both reduces the soil water content and the rate of evapotranspiration and thus reduces the rate of water resume in the soil. Water deficit in the growing period of flowering can reduce the transpiration rate, photosynthesis rate and water use efficiency of the single leaf and thus resulted in the reduction of watermelon's yield .Slight water deficit in the growing period of fruit growth could be compensated by the following growing period and result in a higher yield than the full irrigation. The treatments of water deficit in different growing period could improve more or less the content of Vc and the content of soluble solid than the full irrigation treatment, the treatment which conducted water deficit in the growing period of fruit growth could improve the content of Vc and soluble solid significantly. Above all we could conclude that fruit growth period is the optimal period to conduct regulated deficit irrigation to watermelon grown in Minqin county, Gansu province. |
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