Cobertura nitrogenada supraótima sobre características morfo-agronômicas do milho

Content Provider	Semantic Scholar
Author	Fagherazzi, Mariana Mendes Souza, Clovis Arruda Casa, Ricardo Trezzi Coelho, Cileide Maria Medeiros
Copyright Year	2016
Abstract	Nitrogen is the element that has the most influence on grain yield in maize plantations; however, the excess of this nutrient increases the likelihood of lodging. The occurrence of lodging can be prevented by applying a plant growth regulator. In this respect, an experiment was carried out to evaluate the effects of nitrogen sidedressing above the ideal level, associated with the use of trinexapac-ethyl in maize cv. P30R50H. The experiment was conducted under field conditions during the season 2013/2014, in Lages - SC. The experimental design was a randomized block design with four replications, and the treatments consisted of four nitrogen rates and a rate of trinexapac-ethyl applied at all nitrogen rates. Nitrogen rates were equivalent to 1.0, 1.35, 1.70 and 2.0 times the required rate to reach the yield of 12 t ha-1. The N sidedressing rates were equally divided and applied on plants at phenological stages V4, V7 and V9. The trinexapac-ethyl was applied when the plants reached V10 (ten fully developed leaves) at a concentration of 300 g a.i. ha-1. Only the variable length of the leaf opposite the ear increased with increasing the ideal level of nitrogen sidedressing. Lodging, plant height, leaf chlorophyll, grain yield and nitrogen content in the grains were not affected by N sidedressing above the ideal level, associated with the use of trinexapac-ethyl.
Starting Page	74
Ending Page	79
Page Count	6
File Format	PDF HTM / HTML
DOI	10.5965/223811711512016074
Volume Number	15
Alternate Webpage(s)	http://revistas.udesc.br/index.php/agroveterinaria/article/download/223811711512016074/pdf_21
Alternate Webpage(s)	https://doi.org/10.5965/223811711512016074
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article