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    THE EFFECTS OF EARLY HARVESTING ON THE SEED VIGOUR OF THREE CORN (ZEA MAYS L.) HYBRIDS BASED ON GERMINATION CHARACTERISTICS
    (Aloki Applied Ecological Research And Forensic Inst Ltd, 2021) Konuskan, O.; Gozubenli, H.; Barutcular, C.; Hossain, A.; Islam, M. S.; El Sabagh, A.
    Time of harvesting in the case of corn is a key factor that contributes to obtain high seed vigour. In the context, the study was conducted at the Agricultural Experimental Area of Mustafa Kemal University, Turkey (36?15? N and 36?30? E), to evaluate the germination characteristics of three corn hybrids including ?Dekalp 6589 (FAO 700)?, ?Cadiz (FAO 700)? and ?Bolson (FAO 600)?. In order to use them in the present experiment, seeds of the selected corn were harvested at 5 day intervals, starting from the milking stage (seed harvesting of all corn hybrids was done 30 days after tasseling) to physiological maturity stages. Data on 1000 grain weight (1000-GW), electrical conductivity (EC), germination ratio (GR), germination index (GI), accelerated aging test index (AATI), cold test, cold test germination index (CTGI), and cold test germination time (CTGT) significantly varied among the selected hybrids in response to harvesting at different times. When harvesting was done after 30 days of tasseling the dry matter in cultivar ?Cadiz? showed the lowest, while the cultivar ?Bolson? showed the maximum dry matter. The earliest black layer in the cultivar ?Dekalp 6589? was found after 50 days while in the other two hybrids it was recorded 5 days later (55 days). The techniques of the present study related to evaluation seed vigour by estimating and evaluating germination properties may be used in future research as well as by farmers in field conditions for sustainable corn production in the changing climate.
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    Öğe
    Seed vigor of maize grown on the contaminated soils by cadmium
    (Asian Network for Scientific Information, 2010) Gozubenli, H.
    Cadmium is one of the highly toxic heavy metals in the agricultural soils. The effects of cadmium on plant growth have been reported by many authors, but the effects of cadmium content of seeds on germination and seed vigor have not been reported in the literature. A cold test study was conducted to evaluate the effects of different levels of cadmium contamination of soils on seed vigor of maize grown on contaminated soils. The experiment was designed in a randomized complete block design with a split-plot arrangement. Soil series (Comba and Reyhanli) were in the main plots and cadmium contamination levels (0, 10, 20, 40 and 60 mg kg-1) were in the sub-plots. Four replications of 50 seeds from each treatments were planted in cold test for germination and seed vigor. Germination and strong seedling ratios of maize seeds significantly decreased with increases in cadmium contents of soils and the highest germination and strong seedling ratios (90.3, 84.3%, respectively) were observed at uncontaminated soils, whereas, the lowest ratios (79.8, 70.8%, respectively) were at the highest level of Cd contaminated soils. © 2010 Asian Network for Scientific Information.
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    Twin or narrow-row planting patterns versus conventional planting in forage maize production in the Eastern Mediterranean
    (Akademiai Kiado Zrt, 2008) Yilmaz, S.; Erayman, M.; Gozubenli, H.; Can, E.
    Producing forage maize (Zea mays L.) in twin-row planting pattern has been attempted in past years. This research was performed to determine effects of planting patterns and densities on yields of forage maize hybrids. We also examined other plant characteristics associated with forage yield under second crop conditions in Hatay, East Mediterranean region of Turkey, during 2003 and 2004. The experimental design was a randomized complete block design in a split-split-plot arrangement with three replications. The planting patterns of twin row (55:20 cm), conventional row (75 cm) and narrow row (50 cm) were main plots, the plant densities (80,000, 100,000 and 120,000 plants ha(-1)) were split-plots, and the hybrids (PR-1550, MAVERIK and DK-585) were split-split plots. Forage and dry matter yields were significantly affected by planting patterns, plant densities and maize hybrids. Our results revealed the advantage of twin-row planting pattern over conventional and narrow row plantings at all plant densities. Twin row planting out-yielded conventional row (16% more forage and 10.2% more dry matter yield) and narrow-row (7.9% more forage and 5.9% more dry matter yield) plantings. Twin-row planting pattern may be a profitable production technique for forage maize producers.