INFLUENCIA DO HIDROGEL NO CRESCIMENTO E NO TEOR DE NUTRIENTES DAS MUDAS DE Eucalyptus dunnii

Content Provider	Semantic Scholar
Author	Navroski, Marcio Carlos Araújo, Maristela Machado Reiniger, Lia Rejane Silveira Muniz, Marlove Fátima Brião Pereira, Mariane De Oliveira
Copyright Year	2014
Abstract	Objetivou-se avaliar doses do hidro-retentor adicionado ao substrato sobre crescimento, teor nutricional e qualidade de mudas de Eucalyptus dunnii Maiden . O experimento foi realizado em delineamento inteiramente casualizado, com seis tratamentos, constituidos de concentracoes crescentes do hidrogel (0; 1,5; 3,0; 4,5 e 6,0 g.L -1 ). Foram utilizadas seis repeticoes, cada uma composta por 24 plantas. Aos 90 dias apos a semeadura, foi realizada a avaliacao de parâmetros morfologicos das mudas e analise nutricional da parte aerea. A dose em torno de 4,5 g.L -1 ocasiona a melhor resposta quanto as variaveis avaliadas, proporcionando maior altura, diâmetro de coleto, massa seca da parte aerea e radicular e indice de qualidade de Dickson. O uso de doses abaixo de 3 g.L -1 ou acima de 4,5 g.L -1 diminuiram a qualidade das mudas. Todos os macronutrientes apresentaram maior teor na parte aerea (caule + folhas) na presenca do hidrogel. O teor dos macronutrientes na parte aerea das mudas aumenta com a adicao do hidrogel, porem diminui o teor dos micronutrientes. Em geral, o uso do polimero hidro-retentor aumentou a qualidade das mudas de E. dunnii . Palavras-chave : Producao de mudas; polimero hidroretentor; retencao de agua e nutrientes; analise nutricional. Abstract Doses of hydrogel influencing growth and nutritional content in seedlings Eucalyptus dunnii. The objective was to evaluate different dosages of hidroretentor added to the substrate on the growth, nutrient content and quality of Eucalyptus dunnii Maiden . The experiment was conducted in a completely randomized design with six treatments, and increasing concentrations of the hydrogel (0, 1.5, 3.0, 4.5 and 6.0 g.L -1 ). Were six replicates, each consisting of 24 plants. At 90 days after sowing was evaluated morphological parameters of seedlings and nutritional analysis of the seedlings. The dose around 4.5 g.L -1 brings the best answer for the variables evaluated, providing greater height, diameter collect, shoot dry mass, root parts and Dickson quality index. The use of doses below 3 g.L -1 or above 4.5 g.L -1 decreased the quality of seedlings. All macronutrients showed higher content in shoots (leaves + stem) in the presence of the hydrogel. The macronutrient content of the shoots of seedlings increases with the addition of the hydrogel, but decreases the content of micronutrients. In general, the use of polymer hidroretentor increased the quality of the seedlings of E. dunnii . Keywords : Seedling production; polymer hidroretentor; retention of water and nutrients; nutritional analysis.
Starting Page	315
Ending Page	328
Page Count	14
File Format	PDF HTM / HTML
Volume Number	45
Alternate Webpage(s)	https://revistas.ufpr.br/floresta/article/download/34411/25620
Alternate Webpage(s)	https://doi.org/10.5380/rf.v45i2.34411
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article