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Effects of planting density and pattern on physiological
growth indices in maize (Zea mays L.) under
nitrogenous fertilizer application
Sayed Alireza Valadabadi and Hossein Aliabadi Farahani*
Islamic Azad University, Shahr-e-Qods Branch, Iran.
*Corresponding author. E-mail:
farahani_aliabadi@yahoo.com.
Accepted 27 October, 2009 |
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Growth indices are useful
for interpreting plant reaction to environmental factors.
To
evaluate the beneficial impact
of planting density and
pattern
on induced maize (Zea
mays L. cul. Single-cross 704) by nitrogenous
fertilizer, this
research was conducted at Iran and the experimental design
was a split factorial on the basis of completely randomized
block design with
four
replications. The
combination of
nitrogenous
fertilizer
including 520, 400 and 280 kg urea ha-1 were
assigned to the main plots and the planting density (70000
and 90000 plant ha-1) and the planting pattern
treatment (one row and two rows
planting) were
factorially assigned to the subplots.
Treatments
significantly affected the total dry weight (TDW), leaf area
index (LAI), relative growth rate (RGR) and crop growth rate
(CGR). In this study,
results showed that physiological growth indices were
increased by high density, application of
520 kg urea ha-1
and two rows
planting.
Consequently, our
finding may give applicable advice to farmers and
agricultural researchers for management and proper use of
nitrogenous fertilizer in farming of maize under different
planting density conditions.
Key words:
Planting density, nitrogenous fertilizer, planting pattern,
physiological growth indices, Zea mays L. |
