Association of swine wastewater and mineral fertilization on black oat production

Abstract

Swine wastewater (SW) has high organic load, becoming an important source of macro and micronutrients to plants, promoting the improvement of soil quality and development in various cultures. However, when done without agronomic and environmental criteria, it can cause soil problems, nutrient leaching, water resource damage and plant toxicity. The objective of this study was to evaluate the soil chemical properties and the leachate in face of the association of swine wastewater and mineral fertilization (MF) in oat cultivation. An experiment in drainage lysimeter was carried out, using SW applications associated to MF or not, where treatments consisted of doses of 0, 100, 200 and 300 m 3 ha -1 with the absence or presence of MF, under field conditions. We concluded that swine wastewater provided significant increases in sodium, copper, zinc, and nitrite + nitrate as well as pH and calcium reductions in the soil; and in the leachate, significant increase in sodium. Moreover, the use of mineral fertilizer comprising nitrogen, phosphorus and potassium induced a significant increase in phosphorus, potassium and electrical conductivity and a significant reduction in magnesium in the soil; however, in the leachate, electrical conductivity was increased.

Cobertura do solo com aplicação de água residuária em áreas de soja e silagem

“…O uso desses resíduos na agricultura já é estudado e documentado (HERRMANN et al, 2016, PRIOR et al, 2015, MENEGHETTI et al, 2012MAGGI et al, 2013), sendo que a fertilização orgânica, isolada ou associada à adubação mineral, são tidas como alternativas economicamente viáveis (HERRMANN et al, 2016). Ainda, funcionando como como fonte de nutrientes ao sistema de produção agrícola torna se prática agrícola ambientalmente correta, fornecendo uma disposição final do efluente (HOMEM et al, 2014).…”