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首页> 外文期刊>Acta Horticulturae >Foliar 2,4-dichlorophenoxy acetic acid (2,4-D) application after physiological fruit drop reduces fruit splitting and increases fruit size in mandarin.
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Foliar 2,4-dichlorophenoxy acetic acid (2,4-D) application after physiological fruit drop reduces fruit splitting and increases fruit size in mandarin.

机译：生理性落果后施用叶面2,4-二氯苯氧基乙酸（2,4-D）可减少柑桔中的果实分裂并增加果实大小。

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Fruit size and the integrity of the rind are key components that determine the value of a citrus fruit. Fruit splitting is a physiological disorder caused by pressure resulting from the expanding pulp of an individual fruit on its rind, leading to cracks at the stylar-end of the fruit and eventual splitting of the fruit. The evaluation of 2,4-dichlorophenoxy acetic acid (2,4-D) to reduce splitting, was conducted on two different split-susceptible mandarin ( Citrus reticulata) cultivars 'Marisol Clementine' and 'Orri'. Treatments were applied as foliar sprays and commenced after physiological fruit drop (December), alone and in combination with Bonus-NPK. In January (34 mm fruit diameter) and February (42 mm fruit diameter) 10 mg/L 2,4-D were applied on its own. Application of 2,4-D directly after physiological fruit drop, either alone or in a tank-mix with K, consistently reduced the number of split fruit, and increased the growth rate (mm/day) of all the mandarin cultivars. Except for a slight increase in rind coarseness and reduction of juice content of treated fruit, internal and external fruit quality parameters were not significantly affected. The reduction of split fruit and enhancement of fruit growth could be explained by a possible enhancing effect on the growth of the rind's cells, hence increased rind coarseness. A medium cover foliar spray of 10 mg/L 2,4-D directly after physiological fruit drop could be used for 'Marisol Clementine' and 'Orri' mandarin orchards with a history of severe fruit splitting. CT XII International Symposium on Plant Bioregulators in Fruit Production, Orlando, Florida, USA.
机译：水果的大小和果皮的完整性是决定柑橘类水果价值的关键因素。果实分裂是一种生理障碍，是由果皮上单个果实的果肉膨胀导致的压力导致的，导致果的柱头末端开裂并最终导致果实分裂。对两种易分裂的普通话柑桔（Citrus reticulata）品种'Marisol Clementine'和'Orri'进行了2,4-二氯苯氧基乙酸（2,4-D）减少分解的评估。以叶面喷剂形式进行治疗，并在生理性水果滴落（12月）后开始治疗，单独使用或与Bonus-NPK结合使用。一月（水果直径34毫米）和二月（水果直径42毫米）单独施用10 mg / L 2,4-D。单独或在与K的桶混物滴下生理水果后直接施用2,4-D，始终减少了分裂水果的数量，并提高了所有普通话品种的生长速度（毫米/天）。除了果皮粗度略有增加和处理过的水果的果汁含量降低外，内部和外部水果质量参数均未受到明显影响。减少裂果和增加果实生长的原因可能是对果皮细胞生长的可能增强作用，因此果皮粗度增加。生理落果后立即以10 mg / L 2,4-D进行中度覆盖叶面喷雾，可用于“ Marisol Clementine”和“ Orri”柑桔园，其果实严重分裂史。 CT XII国际研讨会，水果生产中的植物生物调节剂，美国佛罗里达州奥兰多市。

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