No tillage soybean yield following wheat, white oat and black oat with and without nitrogen fertilization - DOI: 10.4025/actasciagron.v29i2.257

Abstract

A field experiment was carried out in Maua da Serra, State of Paraná to evaluate the production of dry matter and nutrient accumulation of white oat (Avena sativa), wheat (Triticum sativum) and black oat (Avena strigosa) with 40 kg ha^-1 of nitrogen, black oat without nitrogen addition and the population of spontaneous plants on treatments in fallow. In succession, a soybean (Glycine max) culture was grown in a Haplorthox, in no tillage for 23 years. Results showed the black oat with fertilization nitrogen addition produced the greatest quantity of dry matter, followed by the black oat without fertilization nitrogen addition, white oat, wheat and the natural vegetation. The black oat with and without fertilization nitrogen showed the best results on the nitrogen, phosphorus, potassium, calcium, magnesium, zinc, copper and manganese accumulation. The soybean yield was greater in succession of the black oat with N fertilization, an average of 0.88 mg ha-1 grains, in relation to the other treatments.