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Nitrogen fertilization and rates of glyphosate as growth regulators in zoysiagrass

Grant number: 14/02449-8
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): August 01, 2014
Effective date (End): February 28, 2017
Field of knowledge:Agronomical Sciences - Agronomy - Soil Science
Acordo de Cooperação: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Salatier Buzetti
Grantee:Raíssa Pereira Dinalli Gazola
Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil


Nitrogen fertilization provides, in addition to nutrition, the maintenance of intense green color in ornamental turfgrasses, necessary undeesthetic viewpoint. But, nitrogen (N) increases the growth of shoots and, thus, the frequency of cuts, the main factor in the cost of turfgrasses maintenance. In this context, this study aim to evaluate nitrogen fertilization (via soil and foliar) and the use of rates of glyphosate as a growth regulator in zoysiagrass (Zoysia japonica Steud.) to maintain the visual quality (intense green) and good nutritional quality as well as reduce foliar growth. The research will be conducted at the Experimental Station of UNESP, Ilha Solteira/SP, from August/2014 to July/2017. It will be used a randomized block design with 20 treatments arranged in a factorial scheme 5 x 4 with four replications and 10 m2 per plot. The treatments will be: control (without N), 15 g m-2 of N in the soil without application of foliar N; 30 g m-2 of N in the soil without application of foliar N; 15 g m-2 in the soil with foliar application of N (1% urea) and 30 g m-2 of N in the soil with foliar application of N (1% urea) combined with four rates of glyphosate (0, 200, 400 and 600 g ha-1 active ingredient (a. i.). Will be evaluated: the chemical characteristics of the soil, height and dry matter of leaves, leaf area, ICF index (leaf chlorophyll), the chlorophyll a and b, the digital image analysis and the percentage of phytotoxicity of the shoot, beyond the occurrence of weed species and number of inflorescence, as well as the concentration and accumulation of macro and micronutrients by leaves of turfgrass and log-isometrics balance of nutrients in the leaves and cationic balance in the soil (isometric log ratio - ilr). Will be also assessed the root system (dry matter and macronutrients in roots + rhizomes). (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
RAÍSSA P. D. GAZOLA; SALATIÉR BUZETTI; RODOLFO DE N. GAZOLA; REGINA M. M. DE CASTILHO; MARCELO C. M. TEIXEIRA FILHO; THIAGO DE S. CELESTRINO. Adubação nitrogenada e doses do herbicida glifosato como regulador de crescimento em grama esmeralda. Revista Brasileira de Engenharia Agrícola e Ambiental, v. 23, n. 12, p. 930-936, . (14/02449-8)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
GAZOLA, Raíssa Pereira Dinalli. Nitrogen fertilization and glyphosate rates as growth regulators in zoysiagrass. 2017. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Faculdade de Engenharia. Ilha Solteira Ilha Solteira.

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