Productivity of lettuce in greenhouse as affected by humic and fulvic acids application in association to mineral fertilizer

IF 0.7 4区农林科学 Q4 HORTICULTURE

Horticultura Brasileira Pub Date : 2021-12-01 DOI:10.1590/s0102-0536-20210414

Ana Cristina Lüdtke, D. Dick, Luiza Morosino, Vicente Kraemer

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引用次数: 1

Abstract

ABSTRACT Humic substances (HS) have proved to be effective in improving the productivity of vegetable crops. We examined the effect of commercial biostimulants rich in humic (HA) and fulvic acids (FA) obtained from leonardite on agronomic efficiency and nutrient content in the leaves of lettuce (Lactuca sativa). A greenhouse experiment was carried out employing 2.5-L pots containing Ultisol samples that were supplied with commercial biostimulants rich in HA and FA, alone and in combination with NPK mineral fertilizer. The application of HS biostimulants associated to mineral fertilization to the lettuce plants provided the greatest values of the studied variables, namely: plant height and diameter, leaf number per plant and root length. The combination of FA biostimulants and mineral fertilization increased the lettuce productivity relative to the inorganic fertilizer alone. The combined application of rich biostimulants FA and HA with NPK fertilizes influenced K and Fe uptake by the plants, and their accumulation in the aerial portion. Our results suggest that HS products potentialize the nutritional effect of the mineral fertilizer, when applied in combination.

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腐殖酸和黄腐酸与矿物肥料联合施用对温室生菜生产力的影响

腐殖质(HS)在提高蔬菜作物产量方面具有较好的效果。我们研究了从龙茅属植物中提取的富含腐植酸(HA)和黄腐酸(FA)的商业生物刺激素对生菜(Lactuca sativa)叶片的农艺效率和养分含量的影响。在温室试验中，采用2.5 l盆栽，将富含HA和FA的商业生物刺激素单独或与氮磷钾矿物肥料联合施用Ultisol样品。与矿质施肥相关的HS生物刺激素在生菜植株上的应用提供了最大的研究变量值，即:株高和直径，单株叶数和根长。与单独施用无机肥相比，有机肥生物刺激素与矿质肥联合施用可提高生菜产量。富生物刺激素FA和HA与氮磷钾配施影响植株对钾和铁的吸收及其在地上部分的积累。我们的研究结果表明，当与矿肥混合施用时，HS产品可以发挥矿肥的营养作用。

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

Horticultura Brasileira 农林科学-园艺

CiteScore

1.40

自引率

28.60%

发文量

审稿时长

4-8 weeks

期刊介绍： The journal Horticultura Brasileira, a quarterly journal, is the Official Publication of the Sociedade de Olericultura do Brasil. Its abbreviated title is Hortic. bras., and it should be used in bibliographies, footnotes, references and bibliographic strips.