Production of Eucalyptus urograndis plants cultivated with activated biochar

Abstract

The search for new substrates for the production of seedlings is of great importance for the evolution of the nursery sector. Biochar is an alternative for the use of plant residues, both in soils and as a component of substrates. The main objective of the study was to correlate substrates using biochar (B) and substrates using activated biochar (AB) in different concentrations with biometric and nutritional variables, aside from its effect on the growth of Eucalyptus seedlings. The experiment was conducted in a nursery, located in Sinop, MT, Brazil. The experiment was design in four blocks of ten treatments; commercial substrates (CS), nursery substrate (NS-50% CS and 50% carbonized rice husk and coconut fiber) and eight treatments represented by B and AB additions to each commercial substrate (concentration of 25; 50, 75 and 100%-determined as B25, B50, B75, B100, AB25, AB50, AB75, AB100). At the end of a 90 days cycle after staking, plant height, stem diameter, leaf number and Dickson Quality Index (DQI), fresh and dry biomass accumulation and nutrient concentration in the aerial part were determined. The substrates with activated biochar and the nursery substrate presented superior results for biometric variables.

Biocarvão como condicionar de substratos para a produção de mudas de espécies florestais nativas

“…Resultados semelhantes foram observados por Barros et al (2019), que para avaliar o crescimento inicial de mudas de eucalipto sob a influência de biocarvão produzido a partir do pó-de-serra de resíduos madeireiros, testaram diferentes composições de substratos, verificando que os tratamentos com biocarvão ativado (25, 50, 75 e 100%) e os tratamentos com biocarvão não ativado (75 e 100%) apresentaram os melhores resultados para matéria seca total. Já para os parâmetros altura das mudas e diâmetro do coleto, as melhores respostas foram observadas nos tratamentos com 75 e 100% de ambos os biocarvões.…”

“…Na literatura, verifica-se o potencial de uso do biocarvão como componente de substrato em virtude de sua estrutura porosa e reativa, capaz de aumentar a disponibilidade de água e outros nutrientes essenciais para a planta e abrigar diversos microrganismos benéficos. No crescimento inicial de mudas de espécies florestais, por exemplo, observa-se respostas positivas no uso de substratos com dose de biocarvão entre 7% e 75% (Lima et al, 2015;Rezende et al, 2016;Barros et al, 2019;Research, Society and Development, v. 12, n. 9, e2712943156, 2023 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v12i9.43156 Basílio et al, 2020;Monteiro et al, 2021); respostas negativas acima de 15% (Petter et al 2012a;Soares et al, 2021); e respostas variadas em função da matéria-prima (Reis et al, 2021) e com uso de bioestimulantes (Soares et al, 2021;Santos et al, 2022).…”

Alternative substrates and containers for Ilex paraguariensis seedlings

“…The use of alternative and renewable substrates has been the focus of several studies reusing waste such as sewage sludge, compounded pruning residues and coal residue (Anjos et al, 2018, Barros et al, 2019, Siqueira et al, 2019, Sá et al, 2020. However, it must provide all the physical, chemical, and biological characteristics necessary for the proper development of seedlings (Pascual et al, 2018).…”