...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Scientia horticulturae >Response of evergreen perennial tree crops to gibberellic acid is crop load-dependent: II. GA3 increases yield and fruit size of 'Hass' avocado only in the on-crop year of an alternate bearing orchard.
【24h】

Response of evergreen perennial tree crops to gibberellic acid is crop load-dependent: II. GA3 increases yield and fruit size of 'Hass' avocado only in the on-crop year of an alternate bearing orchard.

机译：常绿多年生树木对赤霉素的反应取决于作物的负荷：II。 GA 3 仅在备用果园的作物年度才增加“ Hass”鳄梨的产量和果实大小。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Despite problems of low fruit set, small fruit size and alternate bearing, the Hass cultivar dominates commercial avocado production worldwide. To increase yield and fruit size, gibberellic acid (GA3) (25 mg l--1) was applied at different stages of "Hass" avocado tree phenology: (i) mid-late April (flower abscission), end of June-beginning of July (fruit abscission and beginning of the exponential phase of fruit growth), and mid-January (beginning of pre-harvest fruit drop); (ii) end of June-beginning of July; and (iii) mid-September (near the end of the major fruit abscission period; period of exponential fruit growth). In both years of the research, applications of GA3 in April and June-July were within the periods of intense flower and fruit abscission, respectively; fruit abscission was low in September and January. Maximum air temperature was not related to flower or fruit abscission. In the on-crop year (391 fruit per untreated control tree), a single application of GA3 at the end of June-beginning of July significantly increased total yield (kilograms only) and yield of commercially valuable fruit (178-325 g/fruit) (as kilograms and number per tree) compared with the control (P <0.0001). GA3 applied in September increased total yield (kilograms only) and yield of commercially valuable fruit (kilograms and number per tree) to values intermediate to and not significantly different from all other treatments, except trees receiving multiple applications of GA3. This treatment reduced total yield and yield of commercially valuable fruit (kilograms and number per tree) relative to all treatments (P <=0.0002). In contrast, during the off-crop year (32 fruit per control tree), no GA3 treatment had a significant effect on yield or fruit size compared with the control and all other GA3 treatments. For "Hass" avocado, there was no negative effect from applying GA3 at the end of June-beginning of July in both the off- and on-crop years; 2-year cumulative total yield and yield of commercially valuable fruit were increased by 27 kg (128 fruit) and 22 kg (101 fruit) per tree, respectively, above the yield of untreated control trees (P <0.0001)
机译：尽管存在低坐果率，小果实大小和可替代结实的问题，但Hass品种在全球鳄梨商业化生产中占主导地位。为了增加产量和果实大小，在“ Hass”鳄梨树物候研究的不同阶段应用了赤霉素（GA 3 ）（25 mg l -1 ）： ）4月中下旬（花朵脱落），6月底-7月初（果实脱落和果实生长的指数期开始）和1月中旬（收获前落果开始）; （ii）6月底至7月初; （iii）9月中旬（主要的水果脱落时期即将结束;水果呈指数增长的时期）。在这两年的研究中，GA 3 在4月和6月至7月的施用分别处于花朵和果实强烈脱落的时期。 9月和1月的水果脱落率很低。最高气温与花朵或水果的脱落无关。在作物年度（每棵未经处理的对照树中有391果实），在6月底至7月初单次施用GA 3 显着提高了总产量（仅千克）和具有商业价值的产量与对照（ P <0.0001）相比，水果（178-325 g /水果）（以千克和每棵树的数量表示）。 9月份应用的GA 3 将总产量（仅千克）和具有商业价值的水果的产量（千克和每棵树的数量）提高到所有其他处理之间的中间值，且与其他处理无明显差异，但接受多次施用的树木GA 3 。与所有处理相比，该处理降低了总产量和商业上有价值的水果的产量（千克和每棵树的数量）（P <= 0.0002）。相反，在非作物年度（每棵对照树32棵水果），与对照和所有其他GA 3 <相比，没有GA 3 处理对产量或果实大小有显着影响。 / sub>处理。对于“无头鳄梨”鳄梨，在农作物种植年和非农作物种植年中，从7月的6月底开始使用GA 3 都没有负面影响。每棵树的2年累计总产量和商业上有价值的果实的产量分别比未处理的对照树的产量增加了27 kg（128个水果）和22 kg（101个水果）（ P < 0.0001）

著录项

相似文献

  • 外文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号