Fertigation of ‘BRS Princesa’ banana with humic substance and saponin-based plant extracts

Abstract

RESUMO Submitted on February 29th, 2016 The use of humic substances and plant extract has been increasing mainly in organic crop systems without scientificbased recommendations. Research is necessary to evaluate the feasibility and the recommendations of these substances. The objective of this work was to evaluate the effect of humic substances (humic and fulvic acids) applied by fertigation with and without saponin-based plant extracts on growth and yield of 'BRS Princesa' banana. The experiment was carried out using the banana cultivar 'BRS Princesa', at a spacing of 2.0 × 2. ) applied with and without a saponin-based plant extract in a randomized block design in split-plot scheme. The following growth variables were evaluated: number of leaves, pseudostem height, pseudostem diameter, and length and width of the third leaf. The number of fruits/hand and hands/bunch, hand and bunch yield, and length and fruit diameter of the second central hand were evaluated during harvest. The doses of humic substances influenced only pseudostem height. Hand yield, as well as fruit length and diameter of 'BRS Princesa' banana were higher in plants fertigated with humic substance and plant extract in comparison with plants fertigated with only humic substance. Key words: Fertirrigação da bananeira 'BRS Princesa' com substâncias húmicas e extratos vegetais a base de saponinasO objetivo desse trabalho foi avaliar o efeito de substâncias húmicas (ácido húmico e fúlvico) aplicadas via fertirrigação com e sem extratos vegetais a base de saponinas nas variáveis de crescimento e produção da bananeira BRS Princesa (Musa sp.). O pomar foi instalado em espaçamento de 2,0 m x 2,5 m, em Latossolo Amarelo Distrocoeso, sob regime de fertirrigação por gotejamento, no Recôncavo da Bahia, Brasil. Os tratamentos consistiram em cinco doses de substância húmicas (0,0; 21,14; 31,71; 42,28 e 63,42 L ha -1 ciclo -1 ) com e sem aplicação de extratos vegetais, a base de saponinas. O delineamento experimental adotado foi o de blocos casualizados, em esquema de parcelas subdivididas no espaço com cinco repetições. Foram efetuadas análises biométricas na ocasião da floração e da colheita, sendo avaliados o crescimento e a produção acumulada, respectivamente. Mediante análise estatística foi verificado que, quando as substâncias húmicas foram associadas aos extratos vegetais, ocorreram influências significativas sobre a produtividade de pencas, comprimento e diâmetro de frutos e quando as substâncias húmicas foram aplicadas de forma isolada ocorreram efeitos significativos, apenas, sobre a altura de plantas.Palavras-chave: Extratos de plantas; irrigação por gotejamento; matéria orgânica; Musa sp.

Economic analysis of fertilization management in ‘Prata-Anã’ Gorutuba banana plants

“…Currently, the use of soil conditioners as supplements for planting fertilization, as well as the use of biostimulants, especially those composed of seaweed-based extracts, has been adopted in agricultural experiments in some regions of the country and the world (BROWN; SAA, 2015; CARVALHO; CRUZ; MARTINS, 2013;DU JARDIN, 2015;MELO et al, 2016MELO et al, , 2017YAKHIN et al, 2017). Although there are studies with biostimulants and soil conditioners in different crops, little is known about the effect of these products on the growth and development of banana trees, even less about their combined performance (MELO et al, 2016;MELO et al, 2017;SANTOS et al, 2017), with need for greater research contributions in this area of knowledge.…”