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Articles by Aysun Peksen
Total Records ( 4 ) for Aysun Peksen
  Aysun Peksen
  This study was conducted to evaluate the fresh pod yield, some plant and pod characteristics of eight local cowpea genotypes and two registered cowpea cultivars as control during 2001-2002 and 2002-2003 plant growth season in Samsun. Plant height, number of branches per plant, days to first pod setting, fresh pod harvest period, number of pods per plant, average pod weight, pod length, width, thickness, flesh thickness and seed coat, flower and pod colour were determined. Simple correlations were also calculated between fresh pod yield per plant and all investigated traits. The highest fresh pod yield per plant was in G10 genotype (110.23 g plant-1). This was followed by registered cowpea cv. Karagoz-86 (81.92 g plant-1), Akkiz-86 (58.12 g plant-1) and Kirazlik1 (54.55 g plant-1). Positive and highly significant (P<0.01) correlations were found between fresh pod yield per plant and fresh pod harvest period, number of pods per plant, average pod weight, length and width. There were also positive and significant (P<0.05) correlations among fresh pod yield per plant, number of branches per plant and pod thickness.
  Erkut Peksen , Aysun Peksen and Cengiz Artik
  In this study, faba bean genotypes which are sown in 2003-2004 winter season were compared for the number of stomata per mm2, stomata width and length on both surface of leaflet, the number of leaflet per leaf, leaflet width and length, and leaf area. Ten genotypes from Black Sea Region of Turkey, two lines from ICARDA, two registered Turkish cultivars and one commercial faba bean cultivar were examined. The stomata numbers per mm2 on the lower and upper epidermis of the leaflets ranged from 259.52-305.88 and 236.66-288.26, respectively. Faba bean genotypes differed only for the number of stomata per mm2 on upper epidermis of the leaflet (p<0.05) and leaflet number leaf-1 (p<0.01). The number of stomata per mm2, stoma width and length on the lower epidermis of the leaflet were greatly higher than that on the upper epidermis (p<0.01). There was a positive and significant correlation between the number of stomata on lower and upper epidermis of the leaflets. Increases in the number of stomata on the lower epidermis reduced stomata length on both lower and upper epidermis. The number of stomata on both surface of the leaflets positively correlated with the number of leaflet leaf-1. Correlations between the leaf area and all investigated characteristics were found to be non significant.
  Aysun Peksen and Beyhan Kucukomuzlu
  This study was conducted to determine yield potential and quality of Pleurotus ostreatus, P. sajor-caju and P. sapidus grown in substrates containing hazelnut husk. Two different mixtures of hazelnut husk:wheat straw:wheat bran (1HH:2WS:1WB and 1.5HH:2WS:0.5WB) and wheat straw as a control (wheat straw+5% wheat bran) were used as substrates. It was determined that Pleurotus species differed (P<0.01) from each other in terms of total yield, while there were no significant differences among substrates for total yield. The highest mushroom yield was obtained from P. sajor-caju (27.00 kg per 100 kg substrate) and P. ostreatus (26.19 kg per 100 kg substrate). P. ostreatus and P. sajor-caju gave the highest biological efficiency (BE) rates (92.54 and 96.46%, respectively) when they cultivated in the wheat straw (control) substrate. BE of substrates prepared by hazelnut husk were lower than the control substrate, and it was found as 67.44% in 1HH:2WS:1WB for P. ostreatus and 70.96% in 1.5HH:2WS:0.5WB for P. sajor-caju. P. sapidus gave the lowest BE`s in all substrates.
  Sezgin Uzun and Aysun Peksen
  In this study, it was aimed to determine the effects of different planting times (01 July, 15 July and 01 August) on the growth and developmental components of some cauliflower cultivars (Snow King, White Cliff, White Rock, White Latin, Me & Carillon, SG 4004 F1 and Serrano) by using plant growth and developmental models. From the results of the present study, it was revealed that thermal time elapsing from planting to curd initiation should be high (about 1200°C days) to stimulate vegetative growth while thermal time elapsing from curd initiation to the harvest should be low (around 200°C days) in terms of curd weight. The highest curd weight and yield were obtained from the plants of the first planting time, namely 01 July, compared to the other planting times (15 July and 01 August). Although there were no significant differences between the cultivars, the highest yield was obtained form Cv. Me & Carillon (13.25 t ha–1), SG 4004 F1 (13.14 t ha–1) and White Rock (11.51 t ha–1) respectively.
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