População Microbiana, Disponibilidade De Nutrientes E Crescimento De Umbuzeiro Em Substratos Contendo Resíduos Orgânicos

Abstract

RESUMO -O umbuzeiro é uma frutífera importante para o nordeste do Brasil porque está sendo utilizada em áreas de reflorestamento e tem potencial econômico. Entretanto, existe uma lacuna a respeito das técnicas de propagação desta cultura, etapa crucial para o bom desenvolvimento da planta. Nesse contexto, este trabalho tem como objetivo avaliar os efeitos de substratos alternativos sobre o crescimento de porta-enxerto de umbuzeiro e sobre atributos de fertilidade e populações microbianas dessas misturas. O delineamento experimental foi inteiramente casualizado, com dez tratamentos: TA= solo + areia (1:1); A= areia; ECSC= esterco caprino + Plantmax® (1:3); EBSC= esterco bovino + Plantmax ® (1:3); ECA= esterco caprino + areia (1:3); EBA= esterco bovino + areia(1:3); ECBSC= esterco caprino + esterco bovino + Plantmax ® (1:1:3); ECBA = esterco caprino + esterco bovino + areia (1:1:3); HSC = húmus + Plantmax ® (1:3) e HA = húmus + areia (1:3), com quatro repetições. A adição de resíduos promoveu uma melhoria na qualidade da produção de porta-enxerto de umbuzeiro, principalmente quando adicionados ao substrato comercial que é a base de matéria orgânica de origem vegetal e vermiculita expandida. Com a análise multivariada de agrupamento perceberam-se três grupos de similaridade. Recomenda-se a utilização de húmus de minhoca ou esterco caprino adicionado ao substrato comercial na produção de porta-enxerto de umbuzeiro. Palavras MICROBIAL POPULATION, NUTRIENT AVAILABILITY, AND GROWTH OF UMBU ON SUBSTRATES WITH ORGANIC RESIDUESABSTRACT -The umbu is an important fruit for the northeast of Brazil because it is being used in reforestation areas and has great economic potential. However, there is a gap on propagation techniques of this culture that is a crucial step for the successful of plant development. Thus, the objective of the present study was to evaluate the effects of alternative substrate on the growth of umbu rootstock, fertility attributes, and microbial populations of these mixtures.The experimental design was completely randomized with 10 treatments: TA = soil + sand (1:1); A = sand; ECSC = goat manure + Plantmax ® (1:3); EBSC = manure + Plantmax ® (1:3); ECA = goat manure + sand (1:3); EBA = manure + sand (1:3); ECBSC = manure + goat manure + Plantmax ® (1:1:3); ECBA = manure + goat manure + sand (1:1:3); HSC = humus + Plantmax ® (1:3) and HA = humus + sand (1:3),with four replications. The addition of residues promoted the quality of the umbu rootstock, especially when mixed with a commercial substrate composed of vegetable organic matter and expanded vermiculite. With multivariate clustering, three groups acknowledged a similarity between the substrate mixtures. The use of humus or goat manure mixed with the commercial substrate is recommended for the production of umbu rootstock.

Use of biochar in the composition of organic substrates for the production of papaya seedlings

“…The positive performance of the biochar also occurs due to the fact that this material contributes to the greater absorption of nutrients from the substrate. This result shows that the use of organic waste with good chemical composition makes it possible to reduce the use of chemical inputs, mitigating production costs, in addition to the fact that these materials promote direct and indirect effects on the quality of substrates and on the production of seedlings (Medeiros et al, 2015).…”

Potential of coffee straw biochal as a substrate conditioner in seed lettuce and sorghum germination and vigority

“…Research has been carried out to study the use of various residues, such as biochar from plant residues, sewage sludge, cotton waste and mustard straw, materials from animal production, among others, in the composition of substrates for the production of seedlings, mainly because it represents an alternative that reduces costs and minimizes the negative environmental impacts resulting from waste disposal (Medeiros et al, 2015;Zhang et al, 2017Zhang et al, , 2019Zhou et al, 2017;Ramlow et al, 2018;Freitas et al, 2023;Khatana et al, 2022).…”

Organic material as supplementation for substrate in papaya seedlings production

“…The positive results of the use of organic compounds are largely due to their nutritional composition and the dynamics of decomposition and release of nutrients to the substrate, increasing the levels of nutrients in forms that can be assimilated by plants and microbial activity (MEDEIROS et al, 2015). Also, the high levels of organic matter in the compounds allow for increased aeration of the substrate (SILVA JÚNIOR et al, 2018), facilitating the drainage of excess water from irrigation.…”

“…Also, the high levels of organic matter in the compounds allow for increased aeration of the substrate (SILVA JÚNIOR et al, 2018), facilitating the drainage of excess water from irrigation. The combination of these factors makes it possible to increase root development and aerial organs (MEDEIROS et al, 2015) Despite the results obtained, there is a continuous demand for information that leverages the production of papaya seedlings, since the species is responsive to the application of different techniques during its establishment (CABRAL et al, 2020). Thus, the aim of the study was to evaluate the of different sources of organic material for the composition of substrates used in the production of papaya seedlings, identifying the effects on the emergence and development of plants.…”