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首页> 外文会议>International citrus congress >Influence of Deficit Irrigation in Phase III of Fruit Growth on Final Fruit Quality in Sweet Orange 'Lane Late'
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Influence of Deficit Irrigation in Phase III of Fruit Growth on Final Fruit Quality in Sweet Orange 'Lane Late'

机译：果实生长第三阶段的亏水灌溉对甜橙“ Lane Late”的最终果实品质的影响

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The citrus crop in Spain is mainly directed to fresh fruit production. The needs of the international market mean that it is necessary to delay the harvesting of some later varieties of mandarin and sweet orange. The climatic condition in the south-east of Spain make it difficult for this later citrus fruit production since the climatic conditions reduce the acid content. It is well known that deficit irrigation increases soluble solids and acid content in citrus fruit. The aim of this work was to apply a strategy of deficit irrigation to improve the final fruit quality in 10-year-old ' Lane late' sweet orange grafted on Carrizo citrange (Citrus sinensis L. Osb.×Poncirus trifoliatta L. ). The experiment was carried out over two years in an experimental orchard located in Torre Pacheco (Murcia, south-east Spain). The deficit irrigation (DI) treatment consisted of the suppression of irrigation in phase III of fruit growth (1st October to 28th February). The irrigation cut-off in phase III reduced the midday stem water potential (ψmd) , the plant water status being heavily influenced by rainfall. In both of the two years, the DI treatment did not alter fruit yield although average fruit weight was slightly reduced. The main effects of DI was on the final fruit quality, increased total soluble solids (TSS) and titratable acidity (TA) and decreased juice percentage, without altering the final maturity index. Plant water stress integral (Sψ) was correlated positively with TSS and TA and negatively with juice percentage. In conclusion, a DI strategy could be useful for improving the final content of TSS and the TA, therefore allowing the harvest to be delayed in this region.
机译：西班牙的柑橘类作物主要用于新鲜水果的生产。国际市场的需求意味着有必要延迟一些后来的普通话和甜橙品种的收获。西班牙东南部的气候条件使后期的柑橘类水果生产变得困难，因为气候条件降低了酸含量。众所周知，亏水灌溉会增加柑桔中的可溶性固形物和酸含量。这项工作的目的是应用一种亏水灌溉策略，以提高嫁接在柑桔柑桔上的10岁“巷晚”甜橙的最终果实品质。该实验是在位于Torre Pacheco（西班牙东南部穆尔西亚）的一个实验果园中进行的，历时两年。亏缺灌溉（DI）处理包括在果实生长的第三阶段（10月1日至2月28日）抑制灌溉。第三阶段的灌溉临界值降低了中午茎水势（ψmd），植物水的状况受到降雨的严重影响。在这两年中，尽管平均果实重量略有减少，但去离子处理并未改变果实产量。 DI的主要作用是对最终果实品质，总可溶性固形物（TSS）和可滴定酸度（TA）的增加以及果汁百分比的降低，而不会改变最终成熟度指数。植物水分胁迫积分（Sψ）与TSS和TA呈正相关，与果汁百分比呈负相关。总之，DI战略可能有助于提高TSS和TA的最终含量，因此可以延缓该地区的收获。

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