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首页> 外文期刊>Acta Horticulturae >Late-season deficit irrigation is a reliable tool for soluble solids improvement in drip-irrigated processing tomato production.
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Late-season deficit irrigation is a reliable tool for soluble solids improvement in drip-irrigated processing tomato production.

机译：后期缺水灌溉是改善滴灌番茄生产中可溶性固形物的可靠工具。

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摘要

Soluble solids concentration (SSC) is an important quality factor for processing tomatoes (Lycopersicon esculentum). The use of drip irrigation often results in undesirably low SSC. The effects of late-season deficit irrigation on fruit yield and SSC was investigated in 5 commercial, drip-irrigated field trials in 2004. In each field the grower's irrigation regime was compared to a treatment receiving 25-50% less water over the final 4-7 weeks before harvest, a period corresponding to fruit ripening. In all fields the growers utilized a deficit irrigation strategy, applying only 32-67% of reference evapotranspiration (ET0) over this period, averaging 53%; the reduced irrigation treatment varied from 20-46% of ET0, averaging 38%. Across fields, the grower irrigation regimes averaged 147 t ha-1 total fruit yield and 5.5 degrees Brix. The reduced irrigation treatment reduced total fruit yield by only 6 t ha-1, and a corresponding increase in SSC resulted in no net loss of Brix yield (yield x degrees Brix). Fruit sampling throughout the ripening period confirmed that the SSC of late-maturing fruit was significantly increased by deficit irrigation, but that the SSC of early-maturing fruit was not increased by stress imposed after they had ripened. We conclude that processing tomatoes can tolerate significant late-season moisture stress without loss of Brix yield, and that late-season deficit irrigation provides a flexible tool for fruit SSC management. SSC monitoring of ripening (pink stage) fruit can help determine the severity of late-season deficit irrigation required to achieve desirable fruit SSC..
机译：可溶性固形物浓度（SSC）是加工番茄（Lycopersicon esculentum）的重要品质因子。滴灌的使用常常导致不希望的低SSC。在2004年的5个商业性滴灌田间试验中，研究了后期亏缺灌溉对水果产量和SSC的影响。在每个田间，将种植者的灌溉方式与最后4个灌溉水量少25-50％的处理进行了比较。收获前-7周，对应于果实成熟的时期。在所有田间，种植者都采用了亏缺灌溉策略，在此期间仅使用参考蒸发蒸腾量（ET0）的32-67％，平均为53％;减少灌溉的处理量占ET0的20-46％，平均为38％。在整个田间，种植者的灌溉方式平均使水果总产量达到147 t ha-1，糖度为5.5度。减少的灌溉处理仅使总水果产量降低了6 t ha-1，而SSC的相应增加导致白利糖度产量没有净损失（产量x糖度）。整个成熟期的水果采样证实，亏水灌溉显着增加了晚熟水果的SSC，但成熟后施加的压力并未增加早熟水果的SSC。我们得出的结论是，加工番茄可以忍受明显的后期水分胁迫而不会损失白利糖度，并且后期缺水灌溉为水果SSC管理提供了灵活的工具。 SSC监测成熟（粉红色阶段）果实可以帮助确定达到理想果实SSC所需的后期亏缺灌溉的严重程度。

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