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Öğe APPLICATION OF BORON AT EARLY VEGETATIVE STAGE IMPROVES THE QUALITY AS WELL AS PRODUCTIVITY OF MAIZE (ZEA MAYS L.) IN MEDITERRANEAN ENVIRONMENT(Parlar Scientific Publications (P S P), 2018) Konuskan, OmerThe filed experiments was conducted in consecutive two seasons (2015 and 2016) at Field Crops Research Farm, Faculty of Agriculture, Mustafa Kemal University, Turkey to determine boron (B) response to the qualitative traits of maize under Mediterranean environmental condition. (ETIDOT-67 (Na2B8O13.4H(2)O)) was used as a source of boron (B) with maintain four levels of B (0, 400, 600 and 800 mg B m(-2)) at three early vegetative stage (V2, V4 and V2+V4) of maize to determine the effect on quality of corn grain. The quality characteristics of maize was significantly affected by different levels of B. Foliar application of B at growth stages of V2+V4 have been shown to be more effective for efficient B use efficiency of maize and thus improved the protein, oil and minerals. If, application of B increased the major quality traits, but decreased Cu content. At the V4 growth stage, B application was positive for all quality parameters, except minerals of B, S and Cu. The maximum value was recorded from application of 800 mg B m(-2) at V2+V4 growth stage. Therefore, application of 800 mg B m(-2) as foliar spray at early vegetative stage could be considered to achieve the good quality of maize.Öğe CHANGES OF SOME GERMINATION CHARACTERISTICS WITH DIFFERENT PHENOLOGICAL STAGES IN MAIZE(Parlar Scientific Publications (P S P), 2019) Yagiz, Ayten; Konuskan, OmerThe objective of this study was to evaluate the effects of germination characteristics in early grain satge periods and some maize hybrids at Mustafa Kemal University Resarch Area and Labrotory in 2018. Four harvests were made at 5 days intervals from milk stage to physiological maturitiy of the grain. Cobs had dried at labarotory condition for 3 months. For statical analysis, a complately randomyzed split plot design was used with four replications. Results indicated that seed germination properties like germination ratio, germination index, germination time and plant growth properties such as root length, root fresh weigth, stem length, stem heigth, thousand grain weigthvaried significantly among varieties or hybrids and different harvesting times. The GR, GI and GT significantly varied among the corn hybrids and the maximum values of GRand GI of the maize was found at the Bolson hybrid, while, no significant variation was recorded regarding root length, stem length and stem weigth among the hybrids. The RFW, TGW and EC significantly differed among the hybrids. The harvest time (after tasseling) under the study exerted significant effect on germination characterstics in maize. The EC was decreased greadually-with increasing the time of harvesting. Interaction between different harvest time and hybrids showed significant variation in respect of GR, GI and GT. The highest GR of stored seeds was found in Dekalp 6589 in the haresting time of 55th which was different from other treatments. The Earliest harvesting of early grain stage time had no effect on seed germination; however seed vigor increased with seed maturity stage. It could be possible to enhance and maintain the quality of corn grain through appropriate storage medium with the acceptable periods. Therefore, it can be concluded that grains should be stored in suitable moisture level.Öğe Effect of Foliar Boron Fertilization on Chemical Properties and Fatty Acid Compositions of Corn (Zea mays L.)(Chiminform Data S A, 2017) Konuskan, Omer; Konuskan, Dilsat Bozdodan; Levai, Codrina MihaelaBoron is a member of the metaloid group of elements and is an important essential microelement needed for normal crop growth and development. This research was conducted in 2015 in Hatay (Mediterranean region of Turkey) to determine foliar application of Boron effect on protein ratio, starch ratio and oil yield and oil components of corn. To evaluate the response of foliar application of boron to corn, four boron doses (control, 4, 6 and 8 mg/m(2)) were applied at the three growing stages (V2; 2 leaves with visible collars, V4; 4 leaves with visible collars, V2V4; half dosage was applied V2 and half dosage was applied V4). The experiment was carried out in a split plot design with three replicates using cultivar 82 May 70. Ears were harvested and randomly selected for analysis of protein ratio, starch ratio, oil yield and fatty acid composition. Even though there was no significant difference in Boron treatments in terms of protein and starch, significant difference was determined in oil yield and fatty acid composition. In general, foliar application of higher Boron doses (6, 8 mg/m(2)) increased oleic acid, palmitic acid, stearic acid. In the early development period (V2), foliar application of boron caused an increase in the content of linoleic acid and linolenic acid of corn.Öğe Effect of Harvesting Time on Yield, Composition and Forage Quality of Some Forage Sorghum Cultivars(Friends Science Publ, 2012) Atis, Ibrahim; Konuskan, Omer; Duru, Metin; Gozubenli, Huseyin; Yilmaz, SabanForage sorghum (Sorghum bicolor (L.) Moench) is one of the most important fresh fodder and silage sourdein the world, and its quality and yield are difectly related in the harvesting time. In this study, four forage sorghum cultivars (Sorghum bicolor (L.) Moench) were compared to determine effects of delayed harvesting time on the changes in yield and forage quality. Field experiments were conducted during the 2010 and 2011 growing seasons. Four forage sorghum cultivars (Early Sumac, Leotti, Nes, Rox) were harvested at four different growing stages (panicle emergence stage (PE), milky stage (MS), dough stage (DS) and physiologic maturity stage (PM)). Dry matter, fresh forage yield, plant height, dry matter content, panicle proportion, protein yield, lignin content and relative feed value (RFV) tended to increase with advanced plant maturity, while leaf proportion, protein content, neutral detergent fiber content (NDF), acid detergent fiber content (ADF), cellulose content and hemicellulose content tended to decrease. Dry matter contents of all sorghum cultivars harvested during the PE and MS. stages were below 247 g kg(-1). Among whole plant organs, stem proportion was higher than those of leaf and panicle proportions. Mean dry matter yields of cultivars were ranged from 18.75 t ha(-1) to 20.15 t ha(-1). These findings have shown that suitable harvesting time of forage sorghum is PM stage for high yield and fodder quality, but it may be harvested at DS stage due to increasing lignin content. None of these sorghum cultivars should be harvested before DS stage for ensilage due to low dry matter content. Nes can be preferred because of the high forage and protein yield. 2012 Friends Science PublishersÖğe EFFECT OF PLANT DENSITY ON GROWTH AND GRAIN YIELD OF SOME HYBRID CORN (ZEA MAYS L.) VARIETIES UNDER MEDITERRANEAN ENVIRONMENT(Parlar Scientific Publications (P S P), 2019) Konuskan, Omer; Kilinc, CengizCorn production in less planr sensity has been struggled over the last decades with differnt degrees of accomplishment. This research was conducted on the second crop growing season in 2016 at the Mustafa Kemal Univertiy, Turkey to determine the optimum plant density (8, 9, 10, and 11 plant/m(2)) for two different maturitiy groups hybrid corn varieties of P31 P 41 (FAO 650) and DKC 5741 (FAO 500). Tasseling time, plant height, stem diameter, stalk length, cob thickness, wedge weight, SPAD, leaf area index, harvest index and grain yield were measured. The results indicated that there were sinificant differences among the plant densities, and between the varieties, and their intercations for almost all the growth and yield trains of hybrid corn varieties. For the plant density, wider spaced plants (8 plants/m(2)) produced the highest values of stem diameter (SD), SPAD reading, ear diameter (ED), grain weight (GW), and grain yield (GY) followed by nearest spaced plants (9 plants/m(2)) as compared to closed spaced plants (10 and 11 plants/m(2)). Significant varietal differences were recorded in all studied traits except SPAD falue and ED. However, the variety DKC 5741 produced shorter plant, lesser LAI and tasseled earlier but generated higher SD, EL (ear length), GW, and GY than the variety P31 P 41. Therefore, the early maturing maize variety DKC 6547 can be grown with maintaining 8-9 plants/m2 for obtaining maximum grain yield corn.Öğe Effects of plant maturity stage on silage quality of some silage sorghum cultivars(Wfl Publ, 2013) Atis, Ibrahim; Duru, Metin; Konuskan, Omer; Gozubenli, HuseyinThe present study was conducted to investigate the ensilage properties of sorghum cultivars at different harvesting times. To achieve this aim, four silage sorghum cultivars (cv. Early Sumac, Leotti, Nes and Rox) were harvested at four different growing stages (panicle emergence stage (PE), milky stage (MS), dough stage (DS) and physiologic maturity stage (PM)). For four cultivars and four harvesting times, sorghum forage ensiled for total 16 silage samples with 3 replications. At the end of a 60-days period of silage, silage samples were opened. Dry matter content, crude lipid content, lignin content and flieg point tended to increase with advanced plant maturity, while CO2 production, neutral detergent fiber content (NDF), acid detergent fiber content (ADF), cellulose content and hemicellulose content tended to decrease. The pH values of sorghum silages were not significantly influenced by harvest time. Also, dry matter content, flieg point, crude lipid content, NDF, ADF, lignin, cellulose and hemicellulose content were significantly influenced by cultivars. These findings showed that suitable harvesting time of forage sorghum is a PM stage for suitable ensilage and among four cultivars, cv. Nes can be preferred because of the high dry matter content, high flieg point and low CO2 production.Öğe EVALUATION OF MAIZE HYBRIDS TO TERMINAL DROUGHT STRESS TOLERANCE BY DEFINING DROUGHT INDICES(Journal Experimental Biology & Agricultural Sciences, 2016) Barutcular, Celaleddin; El Sabagh, Ayman; Konuskan, Omer; Saneoka, Hirofumi; Yoldash, Khair MohammadTerminal drought stress is one of the most important environmental stress factors which can cause a significant reduction in maize productivity. Therefore, to identify the best selection indices for drought tolerance in maize under terminal drought conditions, this research was conducted in two field experiments with some maize hybrids in two cropping seasons (2014 and 2015) under two moisture levels (normal irrigation and water deficit-water stress) at grain filling stage. Results of study revealed that, yield and major yield traits of hybrids adversely affected due to terminal drought stress, it also causing a reduction in productivity with compare normal irrigation conditions. Water stress significantly affected on maize hybrids and there were high variation among hybrids, which could be befits for screening the genotypes. The special attention was paid to hybrids 71May69, Aaccel and Calgary were showed less reduction of grain yield under terminal drought stress. Concerning the genotypes with high stress susceptibility index (SSI) and tolerance index (TOL) were considered as high susceptible to drought and only suitable for irrigated conditions. Accordingly, the positive relationship between stress indices, drought resistance index (DRI), geometric mean productivity (GMP), harmonic mean (HM), mean production (MP), stress tolerance index (STI) and Yield index (YI), and grain yield could be used as the best selection indices for identifying the tolerant hybrids under terminal drought stress.Öğe Genotype and plant density effects on corn (Zea mays L.) forage yield(Asian Network for Scientific Information, 2007) Yilmaz, Saban; Gozubenli, Huseyin; Konuskan, Omer; Atis, IbrahimCorn forage is an important source of feedstuff for beef and dairy catties. A two-year study was conducted in Eastern Mediterranean Region of Turkey to determine the optimum plant densities for forage yields of com genotypes commercially grown in Eastern Mediterranean Region during 2000 and 2001 growing seasons. The experimental design was a randomized complete block in a split-plot arrangement with three replications. Main plots were com hybrids of Dracma, Pioneer 3223, Pioneer 3335, Dekalb 711 and Dekalb 626 and Arifiye. Split-plots were plant densities of 143 000, 114 000, 95 000, 82 000 and 71 000 plant. Split-plot size was 2.8 m by 5.0 m with four rows per plot. The effects of corn genotypes and plant densities on the forage and dry matter yield and some agronomic characteristics were significant. The highest forage and dry matter yields were obtained from Dracma genotype (69.5 and 27.01 ha-1, respectively). The highest forage and dry matter yield obtained at 114000 and 143000 plant densities (64.4 and 62.31 ha-1 forage yield and 24.8 and 23.11 ha-1 dry matter yield, respectively). © 2007 Asian Network for Scientific Information.Öğe GERMINATION CHARACTERISTICS OF MAIZE SEEDS HARVESTED AT DIFFERENT MATURITY IN ACCELERATED AGING TESTS(Parlar Scientific Publications (P S P), 2020) Yagiz, Ayten; Konuskan, OmerHarvesting at the suitable time is a key factor that contributes to get high vigor seeds. The objective of this study was to evaluate the effects of germination characteristics of maize seeds harvested at different maturity saages in accelereted aging tests. This resarch was conducted at Mustafa Kemal University Agriculture Faculty Labrotories in 2018. Ears seeds were harvested at 5 days intervals after 20 days from tasseling milk stage to physiological maturity of the seeds. Ears were dried and allowed to stand for 3 months and then, the seeds were exposed to accelerated aged test. Results indicated that seed germination properties of aged seeds like germination ratio, germination index, germination time and plant growth properties such as root length and root fresh weigth varied significantly depend on hybrids and harvesting times.Öğe Germination characteristics of maize seeds harvested at different maturity in accelerated aging tests(Parlar Scientific Publications, 2020) Yagiz, Ayten; Konuskan, OmerHarvesting at the suitable time is a key factor that contributes to get high vigor seeds. The objective of this study was to evaluate the effects of germination characteristics of maize seeds harvested at different maturity saages in accelereted aging tests. This resarch was conducted at Mustafa Kemal University Agriculture Faculty Labrotories in 2018. Ears seeds were harvested at 5 days intervals after 20 days from tasseling milk stage to physiological maturity of the seeds. Ears were dried and allowed to stand for 3 months and then, the seeds were exposed to accelerated aged test. Results indicated that seed germination properties of aged seeds like germination ratio, germination index, germination time and plant growth properties such as root length and root fresh weigth varied significantly depend on hybrids and harvesting times. © PSPÖğe IMPACT OF BORON APPLICATION ON YIELD AND MINERAL NUTRITION OF WHEAT(Parlar Scientific Publications (P S P), 2021) Yalcin, Mehmet; Konuskan, OmerFoliar application of boron plays an important role in the enhancing of growth and yield of wheat. This study was conducted in the field with consecutive two years (2017-2018) to examine foliar boron fertilization to improve grain yield and grain quality in eastern Mediterranean conditions. The experiment was arranged splits- plots design with three replicates. In wheat production, it was determined that boron application increases the grain yield as well as B, Ca and Fe content in the grain. Our results indicated that boron application produces a positive impact on wheat growth and productivity in the years with little rainfall. The control treatment (no B application) produced the lowest grain yield which was significantly lower than the yield observed with the soil treatment. Boron application improved an effective way in wheat and improvement in nutritive values by B application.Öğe Nitrogen dose and plant density effects on popcorn grain yield(Academic Journals, 2010) Gozubenli, Huseyin; Konuskan, OmerPopcorn (Zea mays everta Sturt.) is a popular and nutritious snack food. Environmental factors affecting grain yield and yield-related components of popcorn are needed to compensate increasing demand. This research was conducted to determine the effects of nitrogen fertilizer application rates and plant densities on grain yield and yield-related plant characteristics of popcorn in Hatay, located at Southern Mediterranean region of Turkey, during 2002 and 2003. The experiment was designed in a randomized complete block design with a split-plot arrangement with three replications. Nitrogen doses of 0, 120, 180 and 240 kg ha(-1) were arranged in the main plots and plant densities of 60,000, 74,000, 88,000 and 102,000 plants ha(-1) were arranged in the sub-plots. Popcorn grain yield and yield-related traits were significantly affected by nitrogen doses and plant densities. Our results indicated that suitable nitrogen dose and plant density were 180 kg N ha(-1) and 88 000 plants ha(-1) for popcorn grown as a second crop in Hatay ecological conditions in Eastern Mediterranean region of Turkey.Öğe PLANTING DENSITIES IMPART VARIANCE IMPACT ON KERNEL PROPERTIES AND SOME QUALITY PARAMETERS IN SOME MAIZE (ZEA MAYS L.) HYBRIDS(Pakistan Botanical Soc, 2022) Konuskan, Omer; Konuskan, Dilsat Bozdogan; Barutcular, Celaleddin; Turan, Nizamettin; Elsabagh, AymanClimate change scenario has revitalized necessity to optimize agronomic management practices for boosting cereals productivity and nutritional quality. To observe the growth and quality attribute of maize hybrids under various planting densities and in order to sort out the most suitable plant population, a field experiment was conducted at the Research Farm, Faculty of Agriculture, Mustafa Kemal University during 2018. Six maize hybrids viz. DKC 6589, Carella, Pioneer 1921, 70 May 82, Cadiz and Bolson were grown using five planting densities (9, 10, 11, 12, and 13 plants m2). The experiment was laid out in split plot arrangement with three replications. Maize hybrids and planting densitides were placed in main plots and sub plots, respectively. Growth characteristics like ear length, weight and diameter, and quality trauts like protein, stach and oil content in grains were determined as response variables. The results revealed that increasing plant densities gradually reduced the growth paramters including ear length, weight and diamter. While, quality traits such as starch and oil contents of basal, middle and tip kernels were increased with the increase in plant densities, but the protein ratio was decreased. The genotypes mean values indicated that 70 May 82 and Carella remained superior for ear length, weight and ear dimater respectively. In contrast, Pioneer 1921 and Bolson outformed other hybrids as far as starch and oil contents were concerned.Öğe A study on percentages of damage ratios of the European corn borer (ECB), Ostrinia nubilalis (Hubner) (Lepidoptera: Pyralidae) on sweet corn cultivars(Entomology & Applied Science Research Letters-Easletters, 2017) Demirel, Nihat; Konuskan, OmerThe European corn borer (ECB), Ostrinia nubilalis (Hubner) (Lepidoptera: Pyralidae) is one of the most important pest of grain corn and sweet corn in Turkey. The objective of this study was to assess percentage damage ratios of the ECB on stalk and corncobs of various sweet corn varieties in Reyhanli district of Hatay province of Turkey. The studies were carried out in 2015-2016 with four different sweet corn varieties including Caremelo, Vega, Merit and Batem. After two years of the study, the ECB larvae caused significant damages on stalk and corncobs of all sweet corn varieties. The percentage damage of stalk and corncobs varied for each of the sweet corn varieties in both years. In the first year, the highest percentages of stalk damage ratios were recorded on Batem (32.45), followed by Vega (19.85), Merit (17.07) and Caremelo (16.72). In the second year, the highest percentages of stalk damage ratios were observed on Merit (59.34), followed by Caremelo (51.65), Batem (45.09) and Vega (35.49). In the first year, the largest percentages of corncobs damage ratios were recorded on Vega (25.73), followed by Batem (16.74), Caremelo (12.11), and Merit (9.30). In the second year, the highest percentages of corncobs damage ratios were observed on Caremelo (14.31), followed by Merit (13.72), Batem (9.98) and Vega (8.93). In conclusion, the largest percentages of stalk + corncobs damages ratios were observed on Batem (49.19), followed by Vega (45.58), Caremelo (28.83) and Merit (26.37) in 2015, while the highest percentages of stalk + corncobs damages ratios were recorded on Merit (73.06), followed by Caremelo (65.96), Batem (55.07) and Vega (44.42) in 2016.Öğe YIELD AND GRAIN PROTEIN OF WHEAT (TRITICUM AESTIVUM L.) IS INFLUENCED BY THE APPLICATION OF DIFFERENT LEVELS OF NITROGEN(Parlar Scientific Publications (P S P), 2020) Jahan, Abu Hena Sorwar; Hossain, Akbar; Alam, Nur; Ali, Ahsan; Saif, Hasib Bin; Kizilgeci, Ferhat; Konuskan, OmerMalnutrition is one of the major problems in the poor people of Bangladesh. There are some reports that additional nitrogen (over than recommended does) application to wheat plants result in more protein content in wheat grain. To justify these phenomena; the experiment was conducted in consecutive two years (2015-16 and 2016-17) at two locations (Gazipur and Dinajpur) during rabi season (November to March each year). There were used six nitrogen (N) treatments, such as 0, 100, 125, T-3; 150, 175 and 200 kg N hat. In the study, wheat cultivated at Dinajpur location exhibited more spikes m(-2), spike length, spikelets spike(-1), grains spike(-1), 1000-grain weight and higher grain yield in both years than Gazipur location. Considering combined N levels over the locations, the highest grain protein (14 %) as well as grain yield (5.00 t ha(-1)) was estimated when 200 kg N ha(-1) was applied. In economics point of view, 200 kg N ha(-1) application also gave the maximum (BCR, 1.21) followed by 175 kg N ha(-1) (1.20) and 150 kg N ha(-1) 1.20). Whereas, the maximum MBCR was found in 100 kg N ha(-1) (15.63). Therefore, to minimize malnutrition severity among the children as well as adult people in the developing countries like Bangladesh, 175 or 200 kg N ha(-1) may he applied in wheat to increase percentage protein in wheat grain.Öğe Yield and grain protein of wheat (triticumaestivuml:) is influenced by the application of different levels of nitrogen(Parlar Scientific Publications, 2020) Sorwar Jahan, Abu Hena; Hossain, Akbar; Alam, Nur; Ali, Ahsan; Saif, Hasib Bin; Kizilgeci, Ferhat; Konuskan, OmerMalnutrition is one ofthe major problems in the poor people of Bangladesh. There are some reports that additional nitrogen (over than recommended does) application to wheat plants result in more protein content in wheat grain. To justify these phenomena, the experiment was conducted in consecutive two years (2015-16 and 2016-17) at two locations (Gazipur and Dinajpur) during rabi season (November to March each year). There were used six nitrogen (N) treatments, such as 0, 100, 125, T3; 150, 175 and 200 kg N ha'1. In the study, wheat cultivated at Dinajpur location exhibited more spikes m'2, spike length, spikelets spike1, grains spike'1, 1000-grain weight and higher grain yield in both years than Gazipur location. Considering combined N levels over the locations, the highest grain protein (14 %) as well as grain yield (5.00 t ha'1) was estimated when 200 kg N ha'1 was applied. In economics point ofview, 200 kg N ha'1 application also gave the maximum (BCR, 1.21) followed by 175 kg N ha'1 (1.20) and 150 kg N ha'1 1.20). Whereas, the maximum MBCR was found in 100 kg N ha'1 (15.63). Therefore, to minimize malnutrition severity among the children as well as adult people in the developing countries like Bangladesh, 175 or 200 kg N ha'1 may be applied in wheat to increase percentage protein in wheat grain. © 2020 Parlar Scientific Publications. All rights reserved.
