Response of Corn (Zea mays L.) Hybrids to Plant Population in Alabama.

Response of Corn (Zea mays L.) Hybrids to Plant Population in Alabama

Noel P. Welch

Brenda V. Ortiz

Abstract

            Corn (Zea mays L.) grain production in the state of Alabama can increase by selecting the correct hybrid and plant population for a given location.  This study was conducted in 2015 and 2016 at Prattville and Belle Mina, Alabama.  The main objective was to determine the yield differences between hybrids planted at different plant populations.  A split plot design was used with hybrids assigned to main plots and plant populations to subplots.  Six hybrids, each with a different comparative relative maturity – from 103 days to 121 days, were planted at four different plant populations (88920, 93860, 98800 and 103740 plants per hectare).  For this study data of yield and yield components were collected and analyzed. Significant yield differences were observed between growing seasons and locations.  Hybrid yield differences were observed with respect to plant response to high populations.  Different crop response to plant population was also observed on yield components.   In conclusion, results suggest there are optimum plant populations that will increase yield potential for hybrids planted at the studied locations.