Effect of Different Potassium Rates and Hybrid Maize Varieties on the Grain Yield Under Field Condition at South Sulawesi, Indonesia
World Journal of Agriculture and Soil Science
Potassium (K) is an essential nutrient for plant health and play
critical roles in controlling protein metabolism, enzyme activity
and various metabolic processes. In order to investigate the effect of
different potassium rates and hybrid maize varieties on the yield
and yield components of maize, an experiment was carried out at the
Bajeng Experimental Station, Indonesian Cereals Research
Institute, Gowa, South Sulawesi, from May to September 2017. The level
of K on site of the experiment is 0.26 mg kg-1. The potential
grain yield of three hybrid maize varieties has different. Nasa-29 has potential grain yield (13.5 t ha-1), Bima-20 (12.8 t ha-1) and
Bima-4 (11.7 t ha-1). The experiment was laid out in
randomized split plot design with three replications having a plot size
of 9 m x
6 m with planting density 75 x 25 cm. The main plot was provided with
six different levels of potassium i.e. 0, 20, 40, 60, 80 and 100
kg K2O ha-1. The sub plot consisted of three
hybrid maize varieties i.e. Nasa-29, Bima-20 and Bima-4. The interaction
of different
levels of potassium and hybrid maize varieties significantly affected to
maize cob diameter, weight of 1000 grains, and grain yield.
The application of potassium at the rate of 60 kg K2O ha-1 for Nasa-29 variety produced the highest grain yield (11.33 ha-1) under
field condition at the agro-ecological of Gowa, South Sulawesi.
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