Adubação nitrogenada para produção de tapetes de grama Santo Agostinho e Esmeralda
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Data
2005-03-23
Autores
Godoy, Leandro José Grava de [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O nitrogênio é o elemento que proporciona as maiores respostas no crescimento das gramas e a adubação nitrogenada adequada pode proporcionar a formação do tapete em menor tempo, com boa qualidade. Para testar esta hipótese, o experimento teve como objetivos: (a) determinar a dose de N que permita a produção de tapetes, de boa qualidade, das gramas Zoysia japonica (Esmeralda) e Stenotaphrum secundatum (Santo Agostinho) em menor tempo de produção; (b) estudar a respostas dessas gramas em relação às doses de N; (c) estudar características das gramas que possam auxiliar no manejo da adubação nitrogenada. Foram instalados dois experimentos em fazenda de produção de grama, em Itapetininga, SP, no ano de 2003. O delineamento experimental adotado em ambos experimentos foi em blocos casualizados com quatro repetições. O primeiro foi realizado em uma área de produção de grama Esmeralda, em esquema fatorial 4 x 2 com quatro doses de N: 150, 300, 450 e 600 kg ha-1, divididos em três ou seis aplicações, mais um tratamento que não recebeu N. O segundo experimento foi realizado em uma área de cultivo de grama Santo Agostinho aplicando quatro doses de N: 150, 300, 450 e 600 kg ha-1, divididas em três aplicações, mais um tratamento que não recebeu N. O aumento das doses de N influenciou a taxa de cobertura do solo pela grama Santo Agostinho e Esmeralda reduzindo o tempo para formação do tapete. A concentração de N na folha e da cor verde da grama foram influenciadas pelas doses de N, em ambas espécies, podendo ser utilizadas para auxiliar na recomendação das doses de N. A imagem digital mostrou-se adequada para indicar a taxa de cobertura do solo e a cor verde da folha das gramas Santo Agostinho e Esmeralda. Doses de N entre 350 e 400 kg ha 1 proporcionaram a produção de tapetes de grama Santo Agostinho e Esmeralda...
Nitrogen is the nutrient that provides the largest responses in turfgrass growth and the adequate N fertilization may provide sod production in shorter period, with good quality. To test this hypothesis the experiment had as objectives: (a) to determine the N rate that improves Zoysia japonica (Zoysiagrass) and Stenotaphrum secundatum (St. Augustinegrass) sod quality production, in a shorter period; (b) to study the answers of turfgrass as function of N rates; (c) to study turfgrass characteristics that may help in N fertilization management. Two experiments were conducted in a sod production farm, in Itapetininga, São Paulo State, Brazil, in the year of 2003. The experiments were set in complete blocks design, with four replications. The first experiment was developed in Zoysiagrass sod production area, in a factorial 4 x 2, with four N rates: 150, 300, 450 e 600 kg ha-1, splitting in three or six applications, plus a treatment that didn't receive N. The second experiment was developed in St. Augustinegrass sod production area, with four N rates: 150, 300, 450 e 600 kg ha-1, splitting in three applications, plus a treatment that didn't receive N. The increasing of N rates influenced the soil cover rate by the St. Augustinegrass and Zoysiagrass, reducing the sod production period. The N concentration in leaf and turfgrass green color were influenced by the N rates, in both species and may be used to help in the N rate recommendation. The digital image showed to be adequate to measure the soil cover rate and the green color of St. Augustinegrass and Zoysiagrass leaves. The N rates between 350 and 400 kg ha-1 promoted the St. Augustinegrass and Zoysiagrass sod production, with good quality. Splitting N rates, in three or six applications, hasn't changed the Zoysiagrass sod production period.
Nitrogen is the nutrient that provides the largest responses in turfgrass growth and the adequate N fertilization may provide sod production in shorter period, with good quality. To test this hypothesis the experiment had as objectives: (a) to determine the N rate that improves Zoysia japonica (Zoysiagrass) and Stenotaphrum secundatum (St. Augustinegrass) sod quality production, in a shorter period; (b) to study the answers of turfgrass as function of N rates; (c) to study turfgrass characteristics that may help in N fertilization management. Two experiments were conducted in a sod production farm, in Itapetininga, São Paulo State, Brazil, in the year of 2003. The experiments were set in complete blocks design, with four replications. The first experiment was developed in Zoysiagrass sod production area, in a factorial 4 x 2, with four N rates: 150, 300, 450 e 600 kg ha-1, splitting in three or six applications, plus a treatment that didn't receive N. The second experiment was developed in St. Augustinegrass sod production area, with four N rates: 150, 300, 450 e 600 kg ha-1, splitting in three applications, plus a treatment that didn't receive N. The increasing of N rates influenced the soil cover rate by the St. Augustinegrass and Zoysiagrass, reducing the sod production period. The N concentration in leaf and turfgrass green color were influenced by the N rates, in both species and may be used to help in the N rate recommendation. The digital image showed to be adequate to measure the soil cover rate and the green color of St. Augustinegrass and Zoysiagrass leaves. The N rates between 350 and 400 kg ha-1 promoted the St. Augustinegrass and Zoysiagrass sod production, with good quality. Splitting N rates, in three or six applications, hasn't changed the Zoysiagrass sod production period.
Descrição
Palavras-chave
Nitrogenio, Gramínea, Grasses
Como citar
GODOY, Leandro José Grava de. Adubação nitrogenada para produção de tapetes de grama Santo Agostinho e Esmeralda. 2005. xv, 106 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, 2005.