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首页> 外文期刊>African Journal of Biotechnology >Pre-harvest fruit drop, bunch weight and fruit quality of Rothana and Ghur date palm cultivars as affected by some plant growth regulators
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Pre-harvest fruit drop, bunch weight and fruit quality of Rothana and Ghur date palm cultivars as affected by some plant growth regulators

机译：受到一些植物生长调节剂的影响，Rothana和Ghur枣椰树品种的收获前水果落量，束重和果实品质

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Pre-harvest fruit drop is a serious problem of some date palm cultivars. During 2010 and 2011 seasons, the effect of plant growth regulators 2,4-dichlorophenoxyacetic acid (2,4-D) (50 and 100 ppm), naphthalene acetic acid (NAA) (100 and 150 ppm), gibberellic acid (GA3) (100 and 150 ppm) and?benzyladenine?(BA) (100 and 150 ppm) applications, at 40 and 70 days after pollination, on pre-harvest fruit drop and quality of ‘Rothana’ and ‘Ghur’ dates were studied. In both cultivars, the application of growth regulators at both rates significantly decreased fruit drop. In this respect, 2,4-D and GA3?were the most effective treatments followed by BA, while NAA was the least effective. The reduction in fruit drop resulted in a higher bunch weight in the treated fruit than the control. The high rate of BA was more effective than the low rate in decreasing fruit drop of ‘Ghur’ cultivar. In ‘Rothana’ cultivar, bunch weight was higherthan?the control with both 2,4-D rates; whereas, with GA3?and BA, only the high rate was effective; while in ‘Ghur’ cultivar, bunch weight of all growth regulators treatments was higher than the control. The rutab percentage was lower in NAA treatments than for all the other treatments, except for control in ‘Ghur’ cultivar. Fruit and flesh weight of ‘Rothana’ cultivar were higher at the high rate of 2,4-D, the low rate of GA3?and BA treatments than in the control. There were no consistent effects for growth regulators on the physical and chemical quality characteristics of fruit, possibly due to the large variations of the fruit load among the treatments. It was concluded that under hot arid conditions, the application of growth regulators of especially 2,4-D (50 ppm) and GA3(150 ppm) at both 40 and 70 days from pollination is recommended to reduce pre-harvest drop, and improve fruit quality of both ‘Rothana’ and ‘Ghur’ date palm cultivars.
机译：收获前的落果是一些枣椰子品种的严重问题。在2010年和2011年季节，植物生长调节剂2,4-二氯苯氧基乙酸（2,4-D）（50和100 ppm），萘乙酸（NAA）（100和150 ppm），赤霉素（GA3）的影响分别在授粉后40和70天（100和150 ppm）和“苄基腺嘌呤”（BA）（100和150 ppm）施用，研究了收获前的落果量以及'Rothana'和'Ghur'日期的品质。在两个品种中，以两种速率施用生长调节剂均显着降低了落果率。在这方面，2,4-D和GA3？是最有效的治疗方法，其次是BA，而NAA效果最低。落果量的减少导致处理后的果实的束重高于对照。 BA的高比例在降低'Ghur'品种的果实落下方面比低比例更为有效。在“ Rothana”品种中，在2,4-D比率下，束重均高于对照。而使用GA3和BA时，只有高效率才有效。而在“ Ghur”品种中，所有生长调节剂处理的束重均高于对照。除'Ghur'品种的对照外，NAA处理的rutab百分率低于所有其他处理。 2,3-D比例高，GA3和BA处理比例低时，'Rothana'品种的果实和果肉重量均高于对照。生长调节剂对水果的物理和化学质量特性没有一致的影响，这可能是由于不同处理之间的水果负载差异很大。结论是在干旱的干旱条件下，建议在授粉后40天和70天使用生长调节剂，尤其是2,4-D（50 ppm）和GA3（150 ppm），以减少收获前的下降并改善'Rothana'和'Ghur'枣椰树品种的果实品质。

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