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Effects of Water Stress on Physiological Characteristic and Water Production Efficiency of Tomato
Authors
冯浩
吴普特
郭艳波
Publication date
1 January 2008
Publisher
Abstract
根据番茄的生长发育特点,分别以50%、60%、75%田间持水量作为苗期、开花坐果期、结果期的土壤水分下限,每个生育期的土壤水分上限设置3个水分水平,研究不同生育期水分亏缺和亏缺程度对番茄生长发育及生理特性的影响。结果表明,不同生育期的水分亏缺对番茄株高、茎粗、叶绿素相对含量、日光合及蒸腾速率变化等均有不同程度的影响,呈现明显的生长与生理补偿效应,水分胁迫处理的日光合速率峰值提前出现,蒸腾速率随水分亏缺程度的增加而减少,这有助于调控番茄无用的蒸腾耗水。通过对番茄不同生育期的灌水量和产量关系的研究得出,当全生育期灌水量为4025.80 m3/hm2时,番茄可以获得最高产量12.84×104kg/hm2
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 21/09/2018