4 research outputs found
EMERGÊNCIA E DESENVOLVIMENTO INICIAL DE PLÂNTULAS DE Cassia grandis L. f. EM FUNÇÃO DE DIFERENTES SUBSTRATOS
Currently, it is aimed to use substrates composed primarily of organic waste in order to reduce costs with chemical fertilizer. In that sense, the experiment was to evaluate different types of substrates for the emergence and early development of seedlings of Cassia grandis L. f. The experiment was carried out in a greenhouse at the Departament of Vegetable Sciences of Federal Rural do Semi-Árido (UFERSA), in Mossoró, Rio Grande do Norte state, Brazil. The substrates used were: sand + carbonized rice husk (in ratios of 1:1, 1:3 and 3:1), plant sand + wood dust (in ratios of 1:1, 1:3 and 3:1), plant sand + coconut fiber (in ratios of 1:1, 1:3 and 3:1), plant sand + chestnut bark (in ratios of 1:1, 1:3 and 3:1) and plant sand (control). The experimental design was a completely randomized design with 13 treatments (combinations of substrates), with four replications of 25 seeds and the means to test for Skot-knot (pr <0.05). We evaluated the following variables: plant emergence, emergence speed, plant height, root length and weight of the aerial part of the plant, root dry mass and total dry mass. According to the results, the substrate plant sand + sawdust (1:1) and plant sand + coconut fiber (1:3) showed higher values, providing better results in emergence, weight of the aerial part of the plant, length of the aerial part of the plant, root dry mass and root length. It was found that the substrate compounds sand plant and chestnut bark (1:3) is harmful to the emergence of seedling of Cassia grandis. Atualmente, busca-se utilizar substratos constituídos, principalmente, de resíduos orgânicos, a fim de diminuir os custos com adubação química. Nesse sentido, o experimento teve como objetivo avaliar diferentes tipos de substratos para a emergência e desenvolvimento inicial de plântulas de cássia-rosa (Cassia grandis L. f.). O experimento foi conduzido em casa de vegetação do Departamento de Ciências Vegetais da Universidade Federal Rural do Semiárido (UFERSA), em Mossoró - RN, no período de abril a maio de 2012. Os substratos utilizados foram: terra vegetal + palha de arroz (nas proporções de 1:1, 1:3 e 3:1), terra vegetal + pó de madeira (nas proporções de 1:1, 1:3 e 3:1), terra vegetal + fibra de coco (nas proporções de 1:1, 1:3 e 3:1), terra vegetal + casca de castanha-de-caju (nas proporções de 1:1, 1:3 e 3:1) e terra vegetal (testemunha). O delineamento estatístico utilizado foi o inteiramente casualizado, com 13 tratamentos (combinações dos substratos), em quatro repetições de 25 sementes e as médias submetidas ao teste de Skot-knott (pr<0,05). Foram avaliadas as variáveis porcentagem e velocidade de emergência, comprimento da parte aérea, comprimento de raiz e massa seca da parte aérea, massa seca da raiz e massa seca total. De acordo com os resultados, os substratos terra vegetal + pó de madeira (1:1) e terra vegetal + fibra de coco (1:3) foram os mais apropriados, proporcionando melhores resultados em emergência, massa seca da parte aérea, comprimento da parte aérea, massa seca da raiz e comprimento da raiz. Por outro lado, verificou-se que o substrato composto com terra vegetal e casca de castanha-de-caju (1:3) mostrou-se inadequado para a emergência de plântulas de cássia-rosa
EMERGENCY AND INITIAL DEVELOPMENT OF Cassia grandis L. f. PLANTS ACCORDING TO DIFFERENT SUBSTRATES
Atualmente, busca-se utilizar substratos constitu\ueddos,
principalmente, de res\uedduos org\ue2nicos, a fim de diminuir os
custos com aduba\ue7\ue3o qu\uedmica. Nesse sentido, o
experimento teve como objetivo avaliar diferentes tipos de substratos
para a emerg\ueancia e desenvolvimento inicial de pl\ue2ntulas de
c\ue1ssia-rosa ( Cassia grandis L. f.). O experimento foi conduzido
em casa de vegeta\ue7\ue3o do Departamento de Ci\ueancias
Vegetais da Universidade Federal Rural do Semi\ue1rido (UFERSA), em
Mossor\uf3 - RN, no per\uedodo de abril a maio de 2012. Os
substratos utilizados foram: terra vegetal + palha de arroz (nas
propor\ue7\uf5es de 1:1, 1:3 e 3:1), terra vegetal + p\uf3 de
madeira (nas propor\ue7\uf5es de 1:1, 1:3 e 3:1), terra vegetal +
fibra de coco (nas propor\ue7\uf5es de 1:1, 1:3 e 3:1), terra
vegetal + casca de castanha-de-caju (nas propor\ue7\uf5es de 1:1,
1:3 e 3:1) e terra vegetal (testemunha). O delineamento
estat\uedstico utilizado foi o inteiramente casualizado, com 13
tratamentos (combina\ue7\uf5es dos substratos), em quatro
repeti\ue7\uf5es de 25 sementes e as m\ue9dias submetidas ao
teste de Skot-knott (pr<0,05). Foram avaliadas as vari\ue1veis
porcentagem e velocidade de emerg\ueancia, comprimento da parte
a\ue9rea, comprimento de raiz e massa seca da parte a\ue9rea, massa
seca da raiz e massa seca total. De acordo com os resultados, os
substratos terra vegetal + p\uf3 de madeira (1:1) e terra vegetal +
fibra de coco (1:3) foram os mais apropriados, proporcionando melhores
resultados em emerg\ueancia, massa seca da parte a\ue9rea,
comprimento da parte a\ue9rea, massa seca da raiz e comprimento da
raiz. Por outro lado, verificou-se que o substrato composto com terra
vegetal e casca de castanha-de-caju (1:3) mostrou-se inadequado para a
emerg\ueancia de pl\ue2ntulas de c\ue1ssia-rosa.Currently, it is aimed to use substrates composed primarily of organic
waste in order to reduce costs with chemical fertilizer. In that sense,
the experiment was to evaluate different types of substrates for the
emergence and early development of seedlings of Cassia grandis L. f.
The experiment was carried out in a greenhouse at the Departament of
Vegetable Sciences of Federal Rural do Semi-\uc1rido (UFERSA), in
Mossor\uf3, Rio Grande do Norte state, Brazil. The substrates used
were: sand + carbonized rice husk (in ratios of 1:1, 1:3 and 3:1),
plant sand + wood dust (in ratios of 1:1, 1:3 and 3:1), plant sand +
coconut fiber (in ratios of 1:1, 1:3 and 3:1), plant sand + chestnut
bark (in ratios of 1:1, 1:3 and 3:1) and plant sand (control). The
experimental design was a completely randomized design with 13
treatments (combinations of substrates), with four replications of 25
seeds and the means to test for Skot-knot (pr <0.05). We evaluated
the following variables: plant emergence, emergence speed, plant
height, root length and weight of the aerial part of the plant, root
dry mass and total dry mass. According to the results, the substrate
plant sand + sawdust (1:1) and plant sand + coconut fiber (1:3) showed
higher values, providing better results in emergence, weight of the
aerial part of the plant, length of the aerial part of the plant, root
dry mass and root length. It was found that the substrate compounds
sand plant and chestnut bark (1:3) is harmful to the emergence of
seedling of Cassia grandis
PRODUÇÃO DE ALFACE HIDROPÔNICA UTILIZANDO BIOFERTILIZANTE COMO SOLUÇÃO NUTRITIVA
To evaluate the utilization of the biofetilizer substituting nutrient solution in hydroponic lettuce was carried out the study in greenhouse at Environmental Science Departament of the UFERSA, located in Mossoró, Rio Grande do Norte State, Brazil. The statistical test was realized in randomized blocks, with thee repetitions. Treatments were composed of five nutrient solution (Biofertilizer - T1; Biofertilizer + 25% of the mineral nutrient solution - T2; Biofertilizer + 50% of the mineral nutrient solution - T3; Biofertilizer + 75% of the mineral nutrient solution - T4 and mineral nutrient solution - T5). The fresh and matter biomes, leaf area, diameter of caulis and number of leaf was analyzed. The T5 treatment showed better response in relation to growth parameters and production of hydroponic lettuce, demonstrating that in a hydroponic requires high levels of nutrients readily available to meet the rapid and high nutrient demand
EMERGÊNCIA E DESENVOLVIMENTO INICIAL DE PLÂNTULAS DE Cassia grandis L. f. EM FUNÇÃO DE DIFERENTES SUBSTRATOS
ABSTRACT Currently, it is aimed to use substrates composed primarily of organic waste in order to reduce costs with chemical fertilizer. In that sense, the experiment was to evaluate different types of substrates for the emergence and early development of seedlings of Cassia grandis L. f. The experiment was carried out in a greenhouse at the Departament of Vegetable Sciences of Federal Rural do Semi- Árido (UFERSA), in Mossoró, Rio Grande do Norte state, Brazil. The substrates used were: sand + carbonized rice husk (in ratios of 1:1, 1:3 and 3:1), plant sand + wood dust (in ratios of 1:1, 1:3 and 3:1), plant sand + coconut fiber (in ratios of 1:1, 1:3 and 3:1), plant sand + chestnut bark (in ratios of 1:1, 1:3 and 3:1) and plant sand (control). The experimental design was a completely randomized design with 13 treatments (combinations of substrates), with four replications of 25 seeds and the means to test for Skot-knot (pr <0.05). We evaluated the following variables: plant emergence, emergence speed, plant height, root length and weight of the aerial part of the plant, root dry mass and total dry mass. According to the results, the substrate plant sand + sawdust (1:1) and plant sand + coconut fiber (1:3) showed higher values, providing better results in emergence, weight of the aerial part of the plant, length of the aerial part of the plant, root dry mass and root length. It was found that the substrate compounds sand plant and chestnut bark (1:3) is harmful to the emergence of seedling of Cassia grandis