Soybean nutritional status and seed physiological quality with swine wastewater

• Main Authors: Olga M. Passarin, Silvio C. Sampaio, Danielle M. Rosa, Ralpho R. dos Reis, Marcus M. Correa
• Format: Article
• Language: English
• Published: Universidade Federal de Campina Grande 2016-01-01
• Series: Revista Brasileira de Engenharia Agrícola e Ambiental - Agriambi
• Subjects: fertilização mineral; dejeto suíno; reúso de água
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100016&lng=en&tlng=en

ABSTRACT Swine wastewater application is a practice that can become viable in agriculture, for minimizing fertilization costs and improving soil conditions. Therefore, it is essential to establish criteria that define appropriate application doses from the agronomic and environmental perspectives. The objective of this study was to evaluate the effects of swine wastewater doses associated with mineral fertilization on soybean nutritional status and physiological quality of seed. The experiment was conducted in the agricultural year of 2010/2011, using twenty-four drainage lysimeters in randomized block design in 4 x 2 factorial scheme, with four swine wastewater doses (0, 100, 200 and 300 m3 ha-1) applied before sowing, associated with presence and absence of mineral fertilization, in three replicates. Leaves at the flowering stage were collected for determinations of N, P, K+, Ca+2, Mg+2, Cu+2, Zn+2, Mn and Fe. Symptoms of toxicity and nutritional deficiency were observed in the crop. Furthermore, higher doses of swine wastewater caused lower physiological quality in soybean seeds.