Silicate fertilizer and irrigation depth in corn production

Revista Ceres

Edvaldo Eloy Dantas Júnior²  Lucia Helena Garófala Chaves¹  Fernando Antônio Melo Da Costa¹  Hans Raj Gheyi¹ 

[1] ,Universidade Federal de Campina Grande Departamento de Engenharia Agrícola Campina Grande Paraíba ,Brazil

关键词: silicon;    irrigated corn;    grain production;    silício;    milho irrigado;    produção de grãos;   

DOI  :  10.1590/S0034-737X2013000400016

来源: SciELO

【 摘 要 】

Calcium-magnesium silicates improve the soil physicochemical properties and provide benefits to plant nutrition, since they are sources of silica, calcium and magnesium. The objective of this study was to evaluate the grain yield of irrigated corn fertilized with calcium-magnesium silicate. The experiment was carried out in a greenhouse in Campina Grande - PB, Brazil, using plastic pots containing 80 kg of soil. The treatments consisted of the combination of four irrigation depths, related to water replacement of 50, 75, 100 and 125% of the crop evapotranspiration, with fertilizer levels of 0, 82, 164 and 246 g of calcium-magnesium silicate, with three replications. The experimental design was in randomized blocks, with the irrigation depths distributed in bands while the silicon levels constituted the subplots. Corn yield was influenced by calcium-magnesium silicate and by irrigation depth, obtaining the greatest grain yield with the dose of 164 g pot-1 irrigated at the highest water level. The water-use efficiency of in corn production tended to decrease when the irrigation depth was increased. The best water-use efficiency was observed when the irrigation level was between 87 and 174 mm, and the dose of silicate was 164 g pot-1.

【 授权许可】

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