Allometery and productivity of autumn planted maize hybrids under narrow row spacing
2010
Ahmad, M. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agronomy) | Khaliq, A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agronomy) | Ahmad, R. (University of Agriculture, Faisalabad (Pakistan). Inst. of Soil and Environmental Sciences) | Ranjha, A.M. (University of Agriculture, Faisalabad (Pakistan). Inst. of Soil and Environmental Sciences)
Modern maize (Zea mays L.) hybrids have the ability to tolerate narrow row spacing that helps enhancing yields per unit area. Variation in developmental plasticity and tolerance of present-day hybrids to reduced row spacing has been evaluated by using three maize hybrids for two years under field conditions. The objectives of the study was to determine whether hybrids belonging to different relative maturity groups respond differently in terms of growth dynamics and agronomic performance when grown at reduced row spacing of 60 and 45 cm compared with conventional rows of 75 cm. Results revealed that late maturing maize hybrid Pioneer-30Y87 exhibited not only maximum leaf area index, but exceeded in crop growth rate and plant height. During both the years of experimentation, early maturing hybrid DK-919 produced higher grain yield than mid and late maturity maize hybrids. Early (DK-919) and late (Pioneer-30Y87) maize hybrids performed best at 45 cm row spacing,
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