Articles

Waxy maize yield and components as influenced by environment, water regime, and hybrid


Abstract


Limited research on environment and production practices on grain yield and yield components of waxy maize (Zea mays L) has been conducted. Research was conducted in 2012 and 2013 at Mead and North Platte, NE under irrigated and rainfed water regimes with the objective to determine the influence of environment, water regime and hybrid on waxy maize yield and yield components. The waxy maize hybrids P0461EXR, P35F36, P1162EXR, and P1395EXR were grown. Grain yield, ears m-2, kernels ear-1, kernels row-1, rows ear-1, ear length, and circumfer- ence and kernel weight were determined. Average grain yield was 9.5 Mg ha-1 across environments and irrigation increased grain yield by 3.1 to 3.3 Mg ha-1 at Mead and 8.1 to 12.7 Mg ha-1 at North Platte. The highest irrigated grain yields of 14.2 Mg ha-1 were produced at North Platte in 2013 while the highest rainfed grain yields of 10.1
Mg ha-1 were produced in Mead in 2013. Kernel weight in Mead and North Platte irrigated environments had the highest correlation with grain yield (R = 0.67), while kernels ear-1 had the highest correlation (R = 0.78) with grain yield in the North Platte rainfed environment. Hybrid influenced yield and yield components, however the influ- ence on yield was much less than for environment and water regime. Waxy maize had similar grain yield and yield components to previous studies with dent maize. Irrigated and higher rainfall environments produced high waxy maize yields, thus waxy maize should be a viable specialty crop option if minimal market incentives are available.

Keywords

Waxy maize, yield components, irrigation, rainfed

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