Doses de ácido húmico e déficit hídrico no crescimento da grama zeon
Carregando...
Data
2021-03-12
Autores
Costa, João Victor
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
Devido a suas qualidades estéticas, bem como suas diversas funcionalidades, a grama ocupa uma posição de destaque dentro dos cultivos. Contudo, o desenvolvimento das gramas depende de fatores relacionados às características físicas e químicas do solo, disponibilidade hídrica, temperatura e intensidade de luz ideais. Objetivou-se com o presente trabalho avaliar a grama ZeonTM submetida a diferentes doses de ácido húmico e déficit hídrico, visando manter o desenvolvimento do gramado mesmo em condições de estresse. O experimento foi instalado em casa de vegetação localizada no município de Botucatu, SP. O delineamento utilizado foi o em blocos inteiramente casualizados, organizados em esquema fatorial 5x2, compreendido por doses de ácido húmico (0; 2,0; 4,0; 8,0; 16;0 L ha-1) e por níveis de déficit hídrico compreendido por umidade do solo a 80 e 50% da capacidade de campo, com cinco repetições, totalizando 50 unidades experimentais. A irrigação foi feita por gotejamento, em que os vasos eram pesados diariamente e calculava-se a quantidade de água a ser reposta com base nos déficits hídricos. Foram avaliadas aos 30, 60 e 90 dias após a instalação o índice relativo de clorofila, taxa de cobertura verde do solo, índice de Vegetação por Diferença Normalizada, altura da parte aérea, massa seca das aparas, peso úmido, peso seco e volume de raiz. Os dados obtidos foram submetidos à análise de variância, e quando observado interação significativa entre os fatores, doses e estresses, os mesmos foram ajustados por meio de regressão polinomial utilizando o programa estatístico Sigma Plot. Conclui-se que o déficit de 50% da capacidade de campo, apresentou os melhores parâmetros de desenvolvimento para a grama ZeonTM em relação tratamento com maior umidade do solo representado por 80% da capacidade de campo.
For its aesthetic categories, as well as for its diverse classifications, the herb occupies a prominent position in the cultures. However, the development of grasses depends on factors related to the physical and chemical characteristics of the soil, water availability, temperature and ideal light intensity. The objective of this study was to evaluate a ZeonTM lawn submitted to different doses of humic acid and water deficit, to maintain the development of the lawn even under stress conditions. The experiment was installed in a greenhouse located in the municipality of Botucatu, SP. The design used was in completely randomized blocks, organized in a 5x2 factorial scheme, comprising doses of humic acid (0; 2.0; 4.0; 8.0; 16; 0 L ha-1) and by levels of water deficit comprised by soil moisture at 80 and 50% of field capacity, with five replications, totaling 50 experimental units. Drip irrigation was performed, in which the pots were weighed daily and the amount of water to be replaced was calculated based on the water deficit. At 30, 60 and 90 days after installation, the relative chlorophyll index, green cover rate, vegetation index by normalized difference, height of the aerial part, dry weight of the cuttings, wet weight, dry weight and volume of the source root. The collected data were used for analysis of variance and, when observed between factors, doses and tensions, they were adjusted by polynomial regression using the statistical program Sigma Plot. It is concluded that the deficit of 50% of the field capacity, presented the best development parameters for the ZeonTM grass in relation to treatment with higher soil moisture represented by 80% of the field capacity.
For its aesthetic categories, as well as for its diverse classifications, the herb occupies a prominent position in the cultures. However, the development of grasses depends on factors related to the physical and chemical characteristics of the soil, water availability, temperature and ideal light intensity. The objective of this study was to evaluate a ZeonTM lawn submitted to different doses of humic acid and water deficit, to maintain the development of the lawn even under stress conditions. The experiment was installed in a greenhouse located in the municipality of Botucatu, SP. The design used was in completely randomized blocks, organized in a 5x2 factorial scheme, comprising doses of humic acid (0; 2.0; 4.0; 8.0; 16; 0 L ha-1) and by levels of water deficit comprised by soil moisture at 80 and 50% of field capacity, with five replications, totaling 50 experimental units. Drip irrigation was performed, in which the pots were weighed daily and the amount of water to be replaced was calculated based on the water deficit. At 30, 60 and 90 days after installation, the relative chlorophyll index, green cover rate, vegetation index by normalized difference, height of the aerial part, dry weight of the cuttings, wet weight, dry weight and volume of the source root. The collected data were used for analysis of variance and, when observed between factors, doses and tensions, they were adjusted by polynomial regression using the statistical program Sigma Plot. It is concluded that the deficit of 50% of the field capacity, presented the best development parameters for the ZeonTM grass in relation to treatment with higher soil moisture represented by 80% of the field capacity.
Descrição
Palavras-chave
Zoysia matrella, Irrigação em gramados, Bioestimulantes, Gramados, Lawn irrigation, Biostimulants, Lawn