| Full text | |
| Author(s): |
Dinalli Gazola, Raissa Pereira
[1]
;
Buzetti, Salatier
[2]
;
Gazola, Rodolfo de Niro
[1]
;
Monteiro de Castilho, Regina Maria
[3]
;
Minhoto Teixeira Filho, Marcelo Carvalho
[2]
;
Celestrino, Thiago de Souza
[1]
;
Dupas, Elisangela
[2]
Total Authors: 7
|
| Affiliation: | [1] Univ Estadual Paulista, UNESP, Programa Posgrad Agron, BR-15385000 Ilha Solteira, SP - Brazil
[2] Univ Estadual Paulista, UNESP, Fac Engn, Dept Fitossanidade Engn Rural & Solos DEFERS, Campus Ilha Solteira, Rua Moncao 226, BR-15385000 Ilha Solteira, SP - Brazil
[3] Univ Estadual Paulista, UNESP, Dept Fitotecnia Tecnol Alimentos & Socio Econ DFT, Fac Engn, BR-15385000 Ilha Solteira, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Ciência Rural; v. 46, n. 6, p. 984-990, JUN 2016. |
| Web of Science Citations: | 1 |
| Abstract | |
ABSTRACT: Nitrogen (N) is the main nutrient responsible for the green coloration of lawns but also stimulates the growth of the aerial portion of grass, thus increasing mowing expenses. Therefore, herbicides may be used as a growth regulator. The ideal herbicide will reduce lawn height without affecting esthetics. Toward this end, the aim of the present study was to evaluate the green coloration of Emerald grass ( Zoysia japonica Steud.) under the effect of different N doses or herbicides used as growth regulators. The study site consisted of randomized blocks containing 20 treatments arranged in a 5×4 factorial design with four treatment groups: four herbicides (glyphosate, imazaquin, imazethapyr, and metsulfuron-methyl, accounting for 200, 420, 80, and 140g ha-1 of the active ingredient, respectively) and the control sample (no herbicide); and three doses of N in the form of urea (5, 10, and 20g m-2), divided into five applications per year, in addition to a treatment without N. Leaf chlorophyll content (LCC) was assessed and the aerial portion of the lawn was measured with digital image analysis. Doses of N ranging from 10 to 20g m-2, divided into five applications a year, provided the lawn with intense green coloration, and the herbicides glyphosate (200g ha-1), imazaquin (420g ha-1), and imazethapyr (80g ha-1) were reported to be suitable for use as growth regulators of the study species, considering maintenance of esthetic quality (green coloration). The digital image analysis of the aerial portion provided more accurate results than use of a chlorophyll meter with regard to the recommendation of both N dose and herbicides to be used as growth regulators of Emerald grass. (AU) | |
| FAPESP's process: | 12/04602-2 - NITROGEN AND APPLICATION OF HERBICIDES AS GROWTH REGULATORS IN ZOYSIA GRASS (Zoysia japonica STEUD.) |
| Grantee: | Raíssa Pereira Dinalli Gazola |
| Support Opportunities: | Scholarships in Brazil - Master |