Efficiency of utilization of nitrogen coated with urease inhibitor in maize.
This study aimed to evaluate under field conditions the efficiency in the use ofN coated with urease inhibitor in maize. The experiment was conducted in the year of 2007/2008. The experimental design was a randomized block design in a factorial 2 x 6, with five repetitions, constituted the N sources (common and coated with urease inhibitor) and levels (0, 40, 80, 120, 160 and 200 kg ha-1 of N) sidedressing nitrogen application in the growth stage V4. Based on the data obtained were determined recovery efficiencies, utilization, agronomic and physiological N applied. In all cases, the efficiency levels for maize were influenced by levels of sidedressing nitrogen application, in which increasing levels of N resulted in a decrease of the efficiencies, regardless of the source being common urea or coated with urease inhibitor.
Universidade Federal Rural da Amazônia, Capitão Poço, Brazil.
Ricardo S
RS
Okumura
Universidade Estadual de Maringá, Maringá, Brazil.
Daiane de C
Dde C
Mariano
Universidade Estadual de Londrina, Londrina, Brazil.
Paulo V C
PV
Zaccheo
Universidade do Estado de Mato Grosso, Tangará da Serra, Brazil.
Amanda N
AN
de Albuquerque
Universidade do Estado de Mato Grosso, Tangará da Serra, Brazil.
Carmo G
CG
Giebelmeier
Universidade Federal Rural da Amazônia, Paragominas, Brazil.
Allan K
AK
da S Lobato
Universidade Estadual de Maringá, Maringá, Brazil.
Antônio A N
AA
Franco
Universidade Federal Rural da Amazônia, Capitão Poço, Brazil.
Neto Cândido F
NC
de Oliveira
Universidade Federal Rural da Amazônia, Capitão Poço, Brazil.
Eduardo C M
EC
Saldanha
Universidade Federal Rural da Amazônia, Capitão Poço, Brazil.
Heráclito E O
HE
da Conceição
Universidade Federal Rural da Amazônia, Capitão Poço, Brazil.
Raimundo T L
RT
da Silva
D018556:Crops, Agricultural / Q000187:drug effects* / Q000201:enzymology / Q000254:growth & development; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D005308:Fertilizers; D009584:Nitrogen / Q000378:metabolism / Q000494:pharmacology*; D010087:Oxides / Q000378:metabolism / Q000494:pharmacology; D017553:Phosphorus Compounds / Q000378:metabolism / Q000494:pharmacology; D010940:Plant Proteins / Q000037:antagonists & inhibitors* / Q000378:metabolism; D017680:Potassium Compounds / Q000378:metabolism / Q000494:pharmacology; D014508:Urea / Q000378:metabolism / Q000494:pharmacology; D014510:Urease / Q000037:antagonists & inhibitors* / Q000378:metabolism; D003313:Zea mays / Q000187:drug effects* / Q000201:enzymology / Q000254:growth & development
D004791:Enzyme Inhibitors; D005308:Fertilizers; D010087:Oxides; D017553:Phosphorus Compounds; D010940:Plant Proteins; D017680:Potassium Compounds; C012500:phosphorus pentoxide; C068440:potassium oxide; D014508:Urea; D014510:Urease; D009584:Nitrogen