| dc.description.abstract | This research was conducted in the Experiment Plot of Agricultural Faculty ofthe
Nonh Sumatra Islamic University (UISU) in the village of Pangkalan Masyhur,
subdistrict of Medan Johor, with dre flat surface topography at the elevation of + 25
metres above sea level.
Objective of this research was to find the effects of varieties and distance of
planting space on the growth and production of maize crops. This research
implemented the Split Plot Desigr (SPD), comprises of 20 treatment combinations, of
which, each of the combination was replicated 3 times. The variety factor as the main
plot, content of 4 kind of varieties, i.e V1 (local variety), V2 (Bisma free hybrid), V3
(Bisi l0) and V+ (P 2l), while the factor of planting space distance as sub-plot, content
of5 level ofdistances, i.e K1 (30 cm x 40 crn = 83.333 plantVha), K2 (40 cm x 40 cm =
62.500 plantVha), K3 (50 cm x 40 cm = 50.000 plants/ha), Ka (60 cm x 40 cm= 41.667
plants/ha) and P5 (70 cm x 40 cm = 35.700 plantVha).
The paameters observed were the height ofplants (cm), total leaf area (cm2), leaf
area index (LAI), d.y weight of plant (g/plants), crop growth rare (g/week), net
assimilation rate (g/cm2lweek), dry wtight of weed (g/o.s m2), cost of weed control and
dry weight of crops production ftg/ha).
Report of the research indicated that the treatment of varieties significantly
affected the height of the plants at the age 2-8 weeks after planting. Total leaf area
was sigrificantly a{Iected at the age 2,4 and 6 weeks after planting, but slightlv
affected at the age 8 weeks after planting- The leaf area index was not significantly
affected at the age 2 weeks after planting. Dry weight of plant was sigrificantly
affected at the age 4 and 8 weeks after planting, while at the age 6 weeks after planting
were slightly affected, but no sigrificant effects were found at the ag€ of2 weeks after
planting. Rate of plant growth was significantly affected at the age 24 and 68 weeks
after planting but no significant effects were found at the age 4-6 weeks after planting.
Significant effects on the rate of net assimilation was found ar lhe a9e.4-6 weeks after
planting, but with just a slight effects was found at tbe age 24 and 6-8 weeks after
planting. Sigrificant effects on dry weight ofweeds was found at the age 3 weeks after
planting, but without significant effects at the age 6 weeks after planting. The varieties
significantly affected the pmduction of maize crops.
Planting space sigrificantly affected the height of plant at the age 4, 6 and 8
weeks after planting, but no sigrrificant effects was found at the age 2 weeks after
planting. Sigrrilicant effects on lhe total leaf area was foun d atthe age2,6 and 8 weeks
after planting, but no sigrrificant effects was found at the age 4 weeks after planting.
Sigrificant effects on leaf area index was found at the age 2 weeks after planting,
but slightly effects found at the age 8 weeks after planting and no significant effects
was found at the age 4 and 6 weeks after planting. Significant effects on the plant's dry weight was found at the age 2-8 weeks after planting while significant e{fects on the
planr's growth rate were found at the age 24 and 4-6 weeks after planting, but slightly
effects were found at the age 6-8 weeks after planting. Significant effects on the rate of
net assimilation were found at the age of 2-4 and 4{ weeks after planting, but no
significant effects were found at the age 6-8 weeks after planting. Seriously effect on
the weed's dry weight was found at the ag€ of 3 and 6 weeks after planting. Planting
space significantly affected the production of maize crops.
Combination of both factors sigrrificantly affected the height of plants at the age
of4 and 6 weeks after planting no sigrificant influence were found at the age of2 and
8 weeks. Significant influence on the total leaf area was found at the age of 2 and 6
weeks after planting, no sigrificant influence were found at the age of4 and 8 weeks
after planting. Significant influence on the leaf area index was found at the age of 2
weeks after planting but no significant influence were found at the age of 4, 6 and 8
weeks. Significant influence on the plant's dry weight were found at the age of 2-8
weeks after planting, while significant influence on the plant's growth rate were found
at the age 4-6 week after planting. Significant influence on the rate of net assimilation
were also found on lhe age 4-6 weeks after plantin& but no significant influence were
found at the age 24 and 6-8 weeks after planting. No significant effecls were formd on
the weed's dry weight at the age of 3 and 6 weeks after planting, so does on the dry
weight of maize crops production.
The hybrid variety has its growth potential and production higher than that of
Bisma and [.oca[ varieties. The highest production of maize crcps was given by the
hybdd variety P 21 (%) followed by hybrid Bisi l0 (Vr), Bisma and Local varieties.
The Eeatment of K3 @lanting space of 50 x 40 cm) presented the highest production
followed by & (60 x 40 cm), K5 (70 x 40 cm) and K; (30 x 40 cm). The combination
of which presented the best growth was the V.tK: (variety of P 2l wirh planting space
of 50 x 40 cm) as it has a good capacity to utilize the growth environment at the
planting space of 50 x 40 cm | en_US |
