Produtividade de soja e milho em função da época de semeadura sob irrigação e sequeiro

Abstract

With the increasing demand for soybean and maize to search for alternative production where they raise the productivity, it is necessary so the aim of this study is to determine the best times where cultures express their full potential, both irrigated and rainfed. Four experiments were conducted in 2012 and late growing season of 2013, at the Experimental Farm of the Federal University of Grande Dourados, located in the municipality of Gold - MS, where two with the cultivation of irrigated soybean and non irrigated, two with the cultivation of irrigated corn and rainfed. The experimental design was randomized blocks, factorial experiment with two factors and four replications. The first factor evaluated was the six sowing dates for soybean (15/09, 15/10, 15/11, 24/12, 2012 and 18/01, 21/02, 2013), and eight sowing dates for maize (15/08, 15/09, 15/10, 15/11 and 06/12 of 2012 and 16/01, 18/02 and 06/03 of 2013) and the second factor was irrigation and dryland. The irrigated both soybean and maize stood in productivity. However the best seasons in irrigated system for soybeans were the September, November and December, while in rainfed system the best yields were found in the seeding of October. For irrigated corn was the best time to August. You upland seasons of August and December.