Ammonia volatilization and yield components after application of polymer-coated urea to maize

Revista Brasileira de Ciência do Solo

Eduardo Zavaschi¹  Letícia De Abreu Faria²  Godofredo Cesar Vitti²  Carlos Antonio Da Costa Nascimento¹  Thiago Augusto De Moura¹  Diego Wyllyam Do Vale²  Fernanda Latanze Mendes²  Marcos Yassuo Kamogawa² 

[1],Escola Superior de Agricultura Luiz de Queiroz - ESALQ Soil Science Department Piracicaba SP ,Brazil

关键词: nitrogen;    polymer-coated urea;    N fertilizer;    ammonia volatilization;    Zea mays;    SPAD reading;    nitrogênio;    ureia revestida com polímeros;    fertilizante nitrogenado;    volatilização de amônia;    Zea mays;    leitura SPAD;   

DOI  :  10.1590/S0100-06832014000400016

来源: SciELO

【 摘 要 】

A form of increasing the efficiency of N fertilizer is by coating urea with polymers to reduce ammonia volatilization. The aim of this study was to evaluate the effect of polymer-coated urea on the control of ammonia volatilization, yield and nutritional characteristics of maize. The experiment was carried out during one maize growing cycle in 2009/10 on a Geric Ferralsol, inUberlândia, MG, Brazil. Nitrogen fertilizers were applied as topdressing on the soil surface in the following urea treatments: polymer-coated urea at rates of 45, 67.5 and 90 kg ha-1 N and one control treatment (no N), in randomized blocks with four replications. Nitrogen application had a favorable effect on N concentrations in leaves and grains, Soil Plant Analysis Development (SPAD) chlorophyll meter readings and on grain yield, where as coated urea had no effect on the volatilization rates, SPAD readings and N leaf and grain concentration, nor on grain yield in comparison to conventional fertilization.

【 授权许可】

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