Response of maize hybrids to varying potassium application in Pakistan

A field experiment was conducted in 2005 and 2006 to evaluate the growth, grain yield, N, P, K concentration in stalk, and quality parameters of three maize hybrids (Pioneer-30D55, Pioneer-3062 and Pioneer-3012) at different levels of potassium (0, 100, 150, 200, and 250 kg per ha). Pioneer-30D55 su...

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Published inPakistan journal of agricultural sciences Vol. 46; no. 3; pp. 179 - 184
Main Authors Bukhsh, M.A.A.H.A. (Government of the Punjab, Dera Ghazi Khan (Pakistan). Agriculture Adaptive Research Complex), Ahmad, R. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agronomy), Ishaque, M. (University of Agriculture, Faisalabad (Pakistan). Dept. of Forestry), Malik, A.U. (Government of the Punjab, Dera Ghazi Khan (Pakistan). Agriculture Adaptive Research Complex)
Format Journal Article
LanguageEnglish
Published 2009
Subjects
APPLICATION RATES
CROP YIELD
CRUDE PROTEIN
GROWTH RATE
HYBRIDS
LIPID CONTENT
NITROGEN CONTENT
PHOSPHORUS
POTASH FERTILIZERS
POTASSIUM
PROXIMATE COMPOSITION
STARCH
ZEA MAYS
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Summary:A field experiment was conducted in 2005 and 2006 to evaluate the growth, grain yield, N, P, K concentration in stalk, and quality parameters of three maize hybrids (Pioneer-30D55, Pioneer-3062 and Pioneer-3012) at different levels of potassium (0, 100, 150, 200, and 250 kg per ha). Pioneer-30D55 surpassed other two hybrids in growth rate, grain yield (6.01 t per ha), N (0.728%), P (0.078%), K (1.79%) concentration in stalk, crude starch (72.97%), protein (8.15%) and oil (4.46%) contents in grains. K application in all treatments significantly increased growth rate, grain yield, N, P, K concentration in stalk, and improved crude starch, protein and oil contents in grains over control. Maximum growth rate grain yield (6.05 t per ha), N (0.751%), P (0.082%), K (1.86%) concentration in stalk, were recorded, when 200 kg K per ha was applied, and beyond this limit, tended to decline its growth rate, grain yield (6.02 t per ha), N (0.743%), P (0.071 %) and K (1.76%) concentration in stalk when 250 kg K per ha was applied, but continued to increase crude starch (72.65%), protein (8.31%) and oil (4.53%) contents in grains. Interactive effects of maize hybrids and potash application levels on growth, yield and N, P, K concentration in stalk, crude starch, oil, and protein contents in grains were, however, non-significant. It was concluded that Pioneer-30D55 performed best with 200 kg K per ha when previous soil K status was 124.5 ppm. However, grain quality parameters were the best at 250 kg K per ha application.
Bibliography:CATPAK-68966
F04
ISSN:0552-9034