Exogenous Azotobacter vinelandii application as a component of integrated plant nutrient management in 'Hass' avocado crops

IF 2.1 3区农林科学 Q2 FORESTRY

Trees Pub Date : 2025-09-13 DOI:10.1007/s00468-025-02667-1

John Alexander Gross-Urrego, Alvaro David Pantoja-Benavides, German Arturo Moreno-Poveda, Augusto Ramírez-Godoy, Cristhian Camilo Chávez-Arias, Hermann Restrepo-Díaz

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引用次数: 0

Key message

Application of Azotobacter vinelandii is a strategy for 'Hass' avocado at various phenological stages, showing a 25% decrease in chemical fertilizer use while improving growth and physiological performance.

Abstract

Azotobacter-based bio-stimulants increase soil nutrient availability, provide substances for plant growth, and reduce fertilizer needs. We examined drench Azotobacter vinelandii (Av) application with two chemical fertilization levels (CF: 100% and CF 75%: 75% chemical soil fertilization) on physiological, nutritional, and fruit yield parameters. Over 20 weeks, three experiments were conducted on different avocado development stages: seedlings, post-transplantation, and mature trees. In each trial, plants received soil treatments with three commercial Av doses [2.5 (Av1), 5 (Av2), and 7.5 (Av3) mL L⁻¹], with two fertilization levels. Soil Av and CF treatments were applied every 30 days from treatment start up to 16 weeks after treatment initiation (WAT). In the seedling trial, treatments with CF 75% combined with either Av2 or Av3 result in improved seedling quality, as indicated by the Dickson Quality Index (DQI), which measures 0.58 for CF 75% alone and approximately 0.79 for CF 75% with Av2 or Av3 at 20 WAT. In post-transplantation trees, CF 75% + Av2 or Av3 improved relative growth rate (0.021 and 0.024 cm cm⁻¹ week⁻¹ for CF 75% + Av2 and Av3, respectively) compared to CF 75% plants (0.013 cm cm⁻¹ week⁻¹) at 20 WAT. Mature trees showed CF 75% + Av2 or Av3 treatments had higher agronomic efficiency (44.7 and 38.2% CF 75% + Av2 and Av3, respectively) than CF 75% trees at 20 WAT. Av could serve as an alternative strategy for integrated plant nutrient management in sustainable 'Hass' avocado production as it reduces chemical fertilization needs by 25% without impacting crop physiology.

查看原文本刊更多论文

在“哈斯”鳄梨作物中施用外源固氮菌作为植物营养综合管理的组成部分

在“哈斯”鳄梨的不同物候阶段，施用固氮菌是一种策略，显示化肥用量减少25%，同时改善生长和生理性能。摘要：以细菌为基础的生物刺激剂增加土壤养分有效性，为植物生长提供物质，减少肥料需求。研究了两种施肥水平（土壤化学肥料比例分别为100%和75%:75%）对葡萄固氮菌（Azotobacter vinelandii, Av）生理、营养和果实产量参数的影响。在20周的时间里，对鳄梨的不同发育阶段进行了三个试验：幼苗、移植后和成熟树。在每个试验中，植物接受了三种商业Av剂量[2.5 （Av1）、5 （Av2）和7.5 (Av3) mL L−1]的土壤处理，施肥水平为两种。从处理开始至处理开始后16周，每30天施用一次土壤Av和CF。在幼苗试验中，CF 75%与Av2或Av3联合处理可以改善幼苗质量，如Dickson质量指数（DQI）所示，在20 WAT时，CF 75%单独处理的DQI为0.58，CF 75%与Av2或Av3联合处理的DQI约为0.79。在移植后的树木中，与CF 75%的植株（0.013 cm cm−1周−1）相比，CF 75% + Av2或Av3在20 WAT下提高了相对生长率（分别为0.021和0.024 cm cm−1周−1）。成熟树在20 WAT时，CF 75% + Av2和Av3处理的农艺效率分别高于CF 75% + Av2和Av3处理的44.7%和38.2%。Av可以作为可持续“哈斯”鳄梨生产中综合植物营养管理的替代策略，因为它可以在不影响作物生理的情况下减少25%的化学施肥需求。

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

Trees 农林科学-林学

CiteScore

4.50

自引率

4.30%

发文量

113

审稿时长

3.8 months

期刊介绍： Trees - Structure and Function publishes original articles on the physiology, biochemistry, functional anatomy, structure and ecology of trees and other woody plants. Also presented are articles concerned with pathology and technological problems, when they contribute to the basic understanding of structure and function of trees. In addition to original articles and short communications, the journal publishes reviews on selected topics concerning the structure and function of trees.