Abstract
The study evaluated the agronomic performance of green maize grown on residual organomineral fertilization used in the industrial tomato crop. The randomized block design was used, with three replications and eight treatments as follows: control (without fertilizer application); mineral fertilizer; cattle manure; organomineral with cattle manure + MAP (monoammonium phosphate); chicken manure; organomineral with chicken manure + MAP; broiler litter; and organomineral with broiler litter + MAP. All of those treatments were applied to the tomato crop that preceded the green maize crop. After the tomato harvest, maize was sown in the same tomato growing row. Growth variables of green maize plants and ears were evaluated. The green maize grown in areas with residues of chicken and cattle manure, used as fertilizers in the tomato crop preceding the maize crop, resulted in a number of commercial ears similar to when mineral fertilizer was used. The same similar results were obtained for ear quality and yield. The use of organic fertilizers in the industrial tomato crop presented high viability, which made possible to replace the use of mineral fertilizers in the subsequent green maize crop.
Highlights
Resumo - Avaliou-se o desempenho agronômico de milho-verde cultivado sobre resíduos de adubação organomineral utilizada na cultura do tomateiro industrial
Utilizou-se o delineamento experimental de blocos ao acaso, com três repetições e oito tratamentos, sendo: testemunha; fertilizante mineral; esterco bovino; organomineral à base de esterco bovino + monoammonium phosphate (MAP); esterco de galinha poedeira; organomineral à base de esterco de galinha poedeira + MAP; cama de frango de corte; e organomineral à base de cama de frango de corte + MAP; todas adubações realizadas para o cultivo do tomateiro, em antecipação ao cultivo do milho-verde
The fertilizer residues used in the tomato crop influenced maize plant height, first ear insertion height, unhusked ear diameter, husked ear diameter, husked ear length, total yield of unhusked ears, and number of commercial ears
Summary
Resumo - Avaliou-se o desempenho agronômico de milho-verde cultivado sobre resíduos de adubação organomineral utilizada na cultura do tomateiro industrial. O milhoverde cultivado em áreas com resíduos da adubação de esterco de galinha poedeira e esterco bovino, utilizados na cultura do tomateiro, antecedente à cultura do milho, proporcionou número de espigas comerciais semelhante ao fertilizante mineral, bem como rendimentos e qualidade das espigas. O uso de fertilizantes orgânicos utilizados na adubação do tomateiro industrial apresentou alta viabilidade e permitiu substituir a adubação mineral do cultivo subsequente do milho-verde. Crop succession consists in the planned development of crops in order to avoid the successive planting of the same species or family, in the same area, over time (Madeira et al, 2015) It enables staggered planting, reduction in the use of agrochemicals by breaking the pathogen life-cycle and diminishing its incidence, contribution to pest control, utilization of fertilizer residues, enhancement of root growth, and, increase of productivity indices (Souza & Resende, 2014). Taking into account the nutritional demands of the tomato plant and the crop management employed (Clemente & Boiteux, 2012), the adoption of crop succession is considered appropriate, which allows the rational utilization of the agricultural inputs used
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