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AGRICULTURAE
CONSPECTUS SCIENTIFICUS
Volume 64, No 1, 1999 (79-84)
PRELIMINARY
COMMUNICATION
Grain Yield of New Winter Wheat Cultivars
in Correlation with Different Sowing Rates
Julijo MARTINČIĆ
1
Milutin BEDE 2
Vlado GUBERAC 1
Sonja MARIĆ 1
SUMMARY
During 1996/97
growing season investigations of influence of different sowing rates (400,
500, 600 and 700 germinable seeds/m 2 ) on grain yield were done at new
AG-cultivars of winter wheat (AG-5.12, Lara, Kruna and Lenta) and cultivar
Žitarka as a control. Field trial was established on split-plot design
with 4 replications and basic plot of 7,8 m 2 . By statistically analysis
of investigation results it was concluded that different sowing rates
have had not significant influence on grain yield. Investigated cultivars
have showed statistically very significant influence on grain yield (P<0,01).
According achieved results and LSD-test, it was found the greatest grain
yield by cultivar AG-5.12 with average values of 9,129 t/ha. The differences
found between this cultivar and other cultivars were statistically very
significant (P<0,01). The lowest values of grain yield have had cultivar
Lenta (7,597 t/ha). Cultivar Žitarka (as a control) has have average values
of 7,642 t/ha. Different sowing rates have had statistically very significant
influence on ears number/m 2 . The greatest ears number were achieved
with sowing rate of 700 germinable seeds/m 2 (893,6 ears/m 2 ) and differences
found between other sowing rates were statistically very significant (P<0,01).
The smallest ears number were achieved with sowing rate of 400 germinable
seeds/m 2 . Investigated cultivars have showed statistically significant
influence on ears number/ m 2 . The greatest values were achieved with
cultivar AG-5.12 (891,5 ears/m 2 ) and the smallest one with cultivar
Lenta (716,8 ears/m 2 ). Cultivar Žitarka (as a control) has have average
values of 795,5 ears/m 2 . The found differences were statistically significant
(P<0,01). The achieved results are showing on posibility of production
price decreasing of winter wheat, trough seed sowing rate decreasing.
KEY WORDS
winter wheat,
cultivars, grain yield, sowing rate, ears number
1 Faculty of Agriculture Osijek
Trg. Sv. Trojstva 3, 31000 Osijek, Croatia
2 Agrigenetics-Osijek
Sjenjak 13, 31000 Osijek, Croatia
Received: March 13, 1998
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