Efeito do extrato húmico solúvel em água e biofertilizante sobre o desenvolvimento de mudas de Callophyllum brasiliense

Abstract

O presente trabalho teve por objetivo avaliar os efeitos da aplicação de extrato húmico solúvel em água (EHSA), biofertilizante Hortbio® (HORT) e a combinação dos dois produtos sobre o crescimento vegetativo, indicador fisiológico (medida do teor de clorofila) e a capacidade de absorção de nutrientes em mudas de guanandi (Callophyllum brasiliense). A adição isolada ou em conjunto de EHSA e HORT não alterou a altura das mudas, o número de folhas, a matéria seca foliar e radicular e a área radicular e foliar durante a fase inicial de crescimento em viveiro. Entretanto, os teores de clorofila e N total aumentaram significativamente nas mudas que receberam os tratamentos HORT e EHSA+HORT. Além disso, a adição de HORT resultou em maiores teores de S, Zn, B, Mg, Mn e Cu nas plantas, enquanto a aplicação do ESHA aumentou os teores de K, Mg, S e B. Os teores de P e Ca não tiveram seus teores alterados pela aplicação dos tratamentos, mas a adição do EHSA e ESHA+HORT reduziram significativamente a absorção de Cu, Fe, Mn e Zn.Effects of water-soluble humic extract and biofertilizer on development of Callophyllum brasiliense seedlingsThe objective of this work was to evaluate the effects of water-soluble humic extract (EHSA), Hortbio® biofertilizer (HORT) and both compounds combination (EHSA+HORT) on vegetative growth, nutrient absorption and chlorophyll levels in guanandi (Callophyllum brasiliense) seedlings. Isolated and combined additions of EHSA and HORT did not affect seedlings height, number of leaves, leaf and root dry matter and leaf area during early stages of seedling growth. However, HORT and EHSA+HORT treatments increased chlorophyll levels and total N content. Addition of HORT resulted in S, Zn, Mg, Mn and Cu increases in the seedlings leaves, while ESHA application increased K, Mg, S and B. P and Ca levels were not altered by the treatments, however, addition of EHSA and EHSA+HORT reduced significantly the absorption of Cu, Fe, Mn and Zn.Index terms: Forestry production; Guanandi; Vegetative growth

Curly lettuce development, nutrient absorption and salinization tolerance in response to an aerobic biofertilizer produced from agro-industrial residues

“…Resende et al (2009) observed that N doses higher than 120 kg ha -1 N applied to lettuce resulted in an increase in the N concentration. Busato et al (2016) found higher levels of N in Guanandi (Calophyllum brasiliense) seedlings fertilized with the same biofertilizer in the present study plus a soluble humic extract. These authors verified that biofertilizer enriched with organic matter and microorganisms can alter the root exudation profile of acids and other organic compounds of the guanandi seedlings, increasing the supply of nutrients to the plant.…”

Humic acids from vermicompost positively influence the nutrient uptake in mangosteen seedlings1

“…Maggioni et al (1987) reported an increase in the S uptake capacity of oat seedlings in response to biostimulant. Busato et al (2016) also reported an increase in the S uptake with the application of a commercial product based on humic acids in Callophyllum brasiliense seedlings.…”

“…Moraes et al (2006) reported a low efficiency of mangosteen seedlings in the Fe uptake, even with this nutrient present at a high concentration in the substrate used, indicating the necessity of Fe application in the nursery stage of this fruit tree. Busato et al (2016) concluded that cationic micronutrients may be temporarily immobilized by complexes formed with e-ISSN 1983-4063 -www.agro.ufg.br/pat -Pesq. Agropec.…”

“…Trop., Goiânia, v. 49, e55529, 2019 can be a viable alternative for nutrient uptake in mangosteen seedlings and, consequently, reduces the period under greenhouse conditions. Some studies have documented positive and promising results of the application of these substances on the nutrient uptake of plant species (Baldotto et al 2009, Lima et al 2011, Busato et al 2016. Gaxiola et al (2012) reported that the increase in the biomass input of plants submitted to the application of humic substances is certainly related to the improvement of the nutrient uptake by plants, as a consequence of the effect of humic substances on the cell membrane permeability.…”

Growth and quality of mangosteen seedlings (Garcinia mangostana L.) in response to the application of humic acids

“…In this context, the application of products derived from humic substances as growth promoters in cultivated plants has generated interest in the agricultural community (DOBBSS et al, 2010). Several studies have documented positive and promising results of the application of these substances on the growth of plant species (CANELLAS et al, 2002;BALDOTTO et al, 2009;CANELLAS and OLIVARES, 2014;OLIVARES et al, 2015;SILVA et al, 2015;BUSATO et al, 2016).…”