Abstract
In this study, we aimed to analyze the growth of Eucalyptus benthamii and Mimosa scabrella seedlings produced on substrates based on biosolids (BIO), carbonized rice hulls (CRH) and semi-decomposed pine husk (SC), and to correlate the properties of the substrates to the growth of seedlings. To this end, six substrates were prepared: SC, BIO/CRH (1/1, v:v), BIO/CRH (4/6, v:v), BIO/CRH (3/7, v:v), BIO/CRH (2/8, v:v) and BIO/CRH (1/9, v:v). The following variables were assessed: shoot height, stem diameter, shoot dry biomass, root dry biomass, ease of seedling removal from the cartridge, and substrate root aggregation. The results showed that all substrates were viable for Eucalyptus benthamii, whereas for Mimosa scabrella, subtracts based on biosolids were not viable because of organic matter, pH, electrical conductivity, and salinity.
Highlights
Nas regiões mais frias, como o sul do Brasil, Eucalyptus benthamii Maiden et Cambage é uma das espécies mais importantes economicamente, visto apresentar boa aptidão, principalmente para a produção de madeira com fins energéticos e sólidos madeiráveis, associada à resistência a geadas (Paludzyszyn Filho et al, 2006)
We aimed to analyze the growth of Eucalyptus benthamii and Mimosa scabrella seedlings produced on substrates based on biosolids (BIO), carbonized rice hulls (CRH) and semi-decomposed pine husk (SC), and to correlate the properties of the substrates to the growth of seedlings
The results showed that all substrates were viable for Eucalyptus benthamii, whereas for Mimosa scabrella, subtracts based on biosolids were not viable because of organic matter, Potential Hydrogen (pH), electrical conductivity, and salinity
Summary
Como o sul do Brasil, Eucalyptus benthamii Maiden et Cambage é uma das espécies mais importantes economicamente, visto apresentar boa aptidão, principalmente para a produção de madeira com fins energéticos e sólidos madeiráveis, associada à resistência a geadas (Paludzyszyn Filho et al, 2006). Podem ser encontrados substratos prontos para produção de mudas, sendo a casca de pinus semidecomposta e a vermiculita (9:1, v/v) o principal produto comercializado (Caldeira et al, 2011). Quanto à casca de arroz carbonizada, esse componente de substrato vem sendo amplamente utilizado na produção de mudas, combinado com outros elementos, como fibra de coco, turfa e casca de pinus. O presente trabalho objetivou analisar o crescimento de mudas de Eucalyptus benthamii e Mimosa scabrella produzidas em substratos renováveis à base de biossólido, casca de arroz carbonizada e casca de pinus semidecomposta, além de analisar a influência das propriedades dos substratos no crescimento das mudas
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