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首页> 外文期刊>American Journal of Experimental Agriculture >Thinning of ‘Eva’ Apple with Plant Growth Regulators
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Thinning of ‘Eva’ Apple with Plant Growth Regulators

机译：用植物生长调节剂稀释“ Eva”苹果

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Aims: The aim of this research was to evaluate the effects that cause the plant growth regulators, namely naphthalene acetic acid (NAA), 6-Benzyladenine (BA) and Promalin? (6- benzyladenine (BA) with the gibberellic acid GA 4+7), on thinning efficacy and return bloom of ‘Eva’ apple trees. Study Design: The experimental design used was a randomized complete block design, with four replications, with two plants per treatment in each block, following a one-step scheme with 13 treatments for the thinning factor. Obtained results were submitted to analysis of variance, and means were compared by Tukey test with a 5% probability of error. Place and Duration of Study: The experiment was carried out during the agricultural cicles 2012/2013 and 2013/2014 in a commercial orchard located in the municipality of Morro Redondo, RS, Brazil. Methodology: Plant growth regulators were applied in both cicles as follows: Promalin? was sprayed at the full bloom (80%) period at doses of 0.5, 1.0, 1.5 and 2.0 mL L-1; NAA and BA were sprayed in fruits with 5-7 mm diameter, at doses of 5, 10 and 15 mg L-1 and 50, 75, 100 and 125 mg L-1, respectively, and hand fruit thinning was performed after full bloom. Results: Number of fruit per plant, the density of fruits by the trunk cross-sectional, yield per plant and the return of bloom in the second cycle were evaluated in the field. Fruit flesh firmness, total soluble solids, fruit diameter, fruit length and mean fruit mass were evaluated at Laboratório de Agronomia (LabAgro), Universidade Federal de Pelotas. With Promalin? at different concentrations, the results were statistically similar to the hand fruit thinning, so this procedure can be another alternative for thinning. Conclusion: The plant growth regulator NAA reduced the harvesting load but caused a negative response and the plants formated of fruits small. The BA-based treatments were more efficacy for reducing fruits load, increased fruit size and accelerated the flowering return.
机译：目的：本研究的目的是评估引起植物生长调节剂的作用，即萘乙酸（NAA），6-苄基腺嘌呤（BA）和Promalin?。 （6-苄基腺嘌呤（BA）和赤霉素GA 4 + 7），对疏松功效​​和“ Eva”苹果树的开花恢复有效。研究设计：使用的实验设计是一个随机的完整区组设计，具有四次重复，每个区组中每个处理有两株植物，遵循一步法，对稀疏因子进行13种处理。将获得的结果提交给方差分析，并通过Tukey检验将均值与5％的错误概率进行比较。研究的地点和持续时间：该实验是在2012/2013年和2013/2014年的农业大流行期间在位于巴西RS Morro Redondo市的一个商业果园中进行的。方法：将植物生长调节剂按以下方式应用于两根柱上：Promalin？在盛花期（80％）以0.5、1.0、1.5和2.0 mL L -1 的剂量喷雾;将NAA和BA分别喷洒在直径5-7毫米的水果中，剂量分别为5、10和15 mg L -1 和50、75、100和125 mg L -1 ，并在盛开后进行手果稀疏。结果：在田间评估了第二周期的单株果实数量，树干横截面的果实密度，单株产量和花期返回。在Pelotas联邦大学的农业技术实验室（LabAgro）评估了果肉的硬度，总可溶性固形物，果实直径，果实长度和平均果实质量。与普罗马林？在不同浓度下，结果在统计上类似于手果稀疏，因此该程序可以作为稀疏的另一种选择。结论：植物生长调节剂NAA减少了收获量，但引起了负面反应，果实形成的植物变小。以BA为基础的处理在减少果实负荷，增加果实大小和加速开花回报方面更具功效。

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