Abstract
The increase in maize yield is directly related to management practices, especially the manipulation of spatial arrangement of plants. This work aimed, evaluated the effect of conventional and twin-row spacing in different plant densities for maize, in the crop year 2011/2012. The treatments consisted of combinations between two rows spacing (twin-row spacing (0.2 x 0.7 m) and conventional spacing (0.7 m)) and five plant populations (50,000; 65,000; 80,000; 95,000 and 110,000 plants ha-1). It was evaluated the plant height, insertion height of the first ear, stem diameter, number of rows, number of kernels per ear, weight of 1,000 kernels, ear weight and yield. The use of twin row spacing provided better results for stem diameter, number of rows, number of kernels per ear, weight of 1,000 kernels, ear weight and the average maize yield. The stem diameter, number of kernels per ear, weight of 1,000 kernels and ear weight responded negatively to increased plant density. Key words: Plant arrangement, yield, agronomic characteristics.
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