Oat Grain Yields Under Nitrogen Levels in Eucalyptus Alley Cropping System in Subtropical Brazil.

Oat grain yields under nitrogen levels in eucalyptus alley cropping system in Subtropical Brazil Abstract Agronomic practices adequacy plays a key role in the integrated systems development. The objective was to determine how the oat (cv. IPR 126) phytomass accumulation, yield compounds and yield are influenced by nitrogen levels (12 and 80 kg N ha-1) at five equidistant positions between two adjacent eucalyptus double line tracks [20 m (4 m x 3 m)] in ACS and traditional no-till agriculture in subtropical Brazil. The experiment was conducted in a split-block randomized block design with four replicates. At the end of oat cycle, there was compensation for the lower spikelets per panicle number by the greater grain per spikelet number, and for higher harvest indexes where oat accumulated less phytomass, in environments with high interspecific interaction. The nitrogen levels increase the oat yield differently at positions relative to the trees in the ACS. Therefore different nitrogen levels should be used at those distances to increase nitrogen use efficiency inside ACS in subtropical Brazil.