INCREASE OF PLANT POPULATION FOR CORN GROWN IN SHORT GROWING SEASON REGIONS
Abstract
This trial was conducted in Lages, SC, Brazil, with the purpose of evaluating the effects of using higher than recommended plant densities on com yield and components. Two hybrids were used: Cargill 901 (very early) and XL 370 (early). Each hybrid was evaluated at three plant densities: 57,500, 71,500 and 82,500 pl/ha. Increasing plant population from 57,500 to 82,500 pilha did not affect grain yield of hybrid C 901 but it linearly reduced productivity of hybrid XL 370. Hybrid XL 370 presented heavier grains than hybrid C 901. Both cultivars linearly decreased number of grains per ear with the increase in plant density. The number of ears per plant was not affected by treatments. Within the levei of productivity obtained in the experiment, increasing plant density above the values suggested currently did not promote any positive effect to com grain yield.
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