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首页> 外文期刊>Acta Horticulturae >Modification of flowering dates in 'Algerie' loquat by means of deficit irrigation.
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Modification of flowering dates in 'Algerie' loquat by means of deficit irrigation.

机译：通过亏缺灌溉改变“阿尔及利亚” lo中的开花日期。

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Regulated deficit irrigation prior to bloom makes loquat more profitable by advancing flowering and consequently the next season's harvesting. To achieve this goal, an irrigation strategy was developed in which watering was completely suppressed during shoot growth (June-July in SE Spain), until the trees accumulated a water stress integral of over 47 MPa day. With the aim of maximizing flowering advancement, the effect of an earlier irrigation restriction was studied. Three deficit irrigation treatments were compared: T1, water cut at the beginning of harvest; T2, water cut at the end of harvest, and T3, irrigation suppressed five weeks after harvest. T1 accumulated a water stress integral of 50.4 MPa between April 7th and June 22nd (76 days). T2 accumulated 57.9 MPa between May 4th and July 13th (70 days). T3 extended from June 8th to August 3rd (56 days), accumulating 57.4 MPa. Water applied throughout the season was 585 mm for T1, 568 mm for T2 and 587 mm for T3, resulting in water savings of around 25% compared to full irrigation needs (763 mm) in the area. Earlier water withholding modified bloom date and length. T3 trees reached full bloom on October 27th, 10 days before fully irrigated trees located in a nearby plot. Bloom season was short in T3 trees (22 days). T1 advanced full bloom by 18 days compared to T3 trees in a small proportion of shoots, those located at the top of the tree (early bloom), whereas most shoots flowered nine days later than T3 (late bloom). Early and late blooms of T1 were staggered, extending over 40 days. T2 lengthened flowering by 30 days and advanced full bloom by four days in comparison to T3. High flowering intensity was observed under all deficit irrigation treatments, especially in T3 and early flowering of T1. This work has allowed us to determine the best timing for deficit irrigation with a view to maximizing flowering advancement.
机译：开花前进行有节制的亏水灌溉，可以通过促进开花和随后的下一季收获来使lo更加有利可图。为了实现这一目标，开发了一种灌溉策略，其中完全抑制了新芽生长过程中的浇水（西班牙东南部的6月至7月），直到树木累积的水分胁迫积分超过47 MPa。为了最大化开花进展，研究了早期灌溉限制的效果。比较了三种缺水灌溉处理方式：T1，收获开始时用水减少; T2是在收获结束时断水，T3是在收获后五周抑制灌溉。 T1在4月7日至6月22日（76天）之间累积了50.4 MPa的水应力积分。 T2在5月4日至7月13日（70天）之间累积了57.9 MPa。 T3从6月8日延长到8月3日（56天），累积压力为57.4 MPa。整个季节中，T1的用水量为585毫米，T2的用水量为568毫米，T3的用水量为587毫米，与该地区的全部灌溉需求（763毫米）相比，节水了约25％。较早的扣水修改了开花日期和时间。 T3树于10月27日盛开，也就是附近的农田完全灌溉的树10天之前。 T3树的开花季节很短（22天）。与T3树木相比，T1盛开的花朵少了18天，只有一小部分的芽位于树的顶部（早开花），而大多数芽比T3的开花时间晚了9天（晚开花）。 T1的早花和晚花错开排列，长达40天。与T3相比，T2将开花期延长了30天，并使盛开期延长了4天。在所有亏缺灌溉处理下均观察到较高的开花强度，尤其是在T3和T1早开花期。这项工作使我们能够确定赤字灌溉的最佳时机，以期最大程度地提高花期。

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