Growth Manipulation of Slicer Carrots by Foliar-applied Gibberellic Acid in New York

IF 1 4区农林科学 Q3 HORTICULTURE

Horttechnology Pub Date : 2023-08-01 DOI:10.21273/horttech05231-23

S. Pethybridge, S. Murphy, J. Kikkert

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引用次数: 0

Abstract

New York, USA, is a regional hub for processing carrot (Daucus carota ssp. sativus) production and Nantes-type cultivars are preferred for slicing. Diameter is critical in carrots for slicing, with roots larger than 1 5/8 inch being rejected. The potential to manipulate carrot root diameter and hence suitability for slicing by foliar-applied gibberellic acid (GA3) was tested in four small plot replicated field trials over 3 years (2020, 2021, and 2022). In the most efficacious treatments, GA3 resulted in a 23.1% to 135.4% increase in foliar biomass at the expense of root weight and diameter. Increases in foliar biomass are beneficial to facilitate top-pulling harvest. Reductions in root diameter from GA3 ranged from 9.5% to 19.6%, and in 2020 and 2022, increased the proportion of roots suitable for slicing. GA3 did not significantly affect root length and number. In two 2021 trials, GA3 increased color intensity quantified by a colorimeter, but this change was not noticeable to the naked eye. The optimal number of GA3 applications was seasonally dependent, ranging from a single application at 107 to 108 days after planting (DAP) in 2021, to two applications at 74 + 92 DAP in 2022. Three GA3 applications per season or late applications (up to 14 days prior to harvest) were not beneficial.

查看原文本刊更多论文

在纽约应用赤霉素对胡萝卜切片生长的调控

美国纽约是加工胡萝卜（Daucus carota ssp.sativus）生产的地区中心，南特型品种是切片的首选品种。胡萝卜的直径对切片至关重要，大于1 5/8英寸的根会被拒收。在3年（2020年、2021年和2022年）的四个小区域重复田间试验中，测试了操纵胡萝卜根直径的潜力，以及通过叶面施用赤霉酸（GA3）进行切片的适宜性。在最有效的处理中，GA3以牺牲根重和直径为代价，使叶片生物量增加23.1%至135.4%。叶面生物量的增加有利于拔梢收获。GA3使根系直径减少9.5%至19.6%，2020年和2022年，适合切片的根系比例增加。GA3对根长和根数无显著影响。在2021年的两项试验中，GA3增加了色度计量化的颜色强度，但肉眼看不到这种变化。GA3的最佳施用次数是季节性的，从2021年种植后107至108天的一次施用到2022年74+92天的两次施用。每个季节施用三次GA3或延迟施用（收获前14天）都没有益处。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Horttechnology 农林科学-园艺

CiteScore

2.30

自引率

10.00%

发文量

审稿时长

3 months

期刊介绍： HortTechnology serves as the primary outreach publication of the American Society for Horticultural Science. Its mission is to provide science-based information to professional horticulturists, practitioners, and educators; promote and encourage an interchange of ideas among scientists, educators, and professionals working in horticulture; and provide an opportunity for peer review of practical horticultural information.