Affiner votre recherche
Résultats 281-290 de 676
Determination of the Effect of Some Properties on Egg Yield with Regression Analysis Met-hod Bagging Mars and R Application Texte intégral
2020
Demet Canga | Mustafa Boğa
In the study, it has been demonstrated its use for a data set obtained from layer hens in a hybrid approach obtained by combining BAGGING and MARS. In the study, the data of 2018 of the egg production enterprise in a private livestock enterprise in the Çukurova Region of Adana province were used. In the research, a data set obtained from Lohman breed chickens, who are at an average age of 60 weeks, was used. Earth (enhanced adaptive regression through hinges) and caret (classification and regression training), mda (Mixture Discriminant Analysis) packages were used in R STUDIO program to provide a stronger solution of regression problems in the created MARS and Bagging MARS algorithm. The estimation performance of the bagging MARS technique was evaluated with the goodness of fit criteria by taking the B value of the bootstrap sample number 3. In the study, the effect of temperature and humidity on egg yield, broken / cracked eggs, number of dead animals and feed consumption was investigated using MARS and bagging MARS analysis. While the effect of evening temperature(t3) on egg yield was found to be significant, it was not included in the estimation equation since morning (t1) and noon(t2) temperatures did not have a significant effect. Since the number of broken / cracked eggs and dead animals is less than 5 weeks, these variables are not included in the estimation equation in MARS and Bagging MARS models. It has been observed that feed consumption has a positive contribution in both models.
Afficher plus [+] Moins [-]Weed-Competitive Ability of Forage Maize Cultivars against Barnyardgrass Texte intégral
2020
Khawar Jabran
Weed-competitive cultivars are desired in the wake of growing popularity of organic farming, environmental pollution and evolution of herbicide resistance in weeds. This research work evaluated the weed competitive ability of three forage maize cultivars (ADA-523, AGA and SASA-5) against the noxious weed barnyardgrass (Echinochloa crus-galli (L.) P.Beauv.). The study was conducted in spring 2018 and repeated in summer 2018. Results of this study showed that maize-barnyardgrass competition significantly decreased the growth of forage maize plants. For instance, barnyardgrass decreased the maize plant height by 11.9-16.9%, leaf length by 13.3-20.2%, leaf width by 20.2-27.4%, and number of leaves by 14.3-25.0%. Fresh and dry weights of maize plants were also significantly decreased as a result of weed-crop competition. Barnyardgrass decreased the shoot fresh weight (30.7-60.6%), shoot dry weight (33.3-52.2%), leaf fresh weight (33.4-56.5%) and leaf dry weight (31.9-50.0%) of the maize plants. An interactive effect of weed × maize cultivars was found non-significant. Forage maize cultivars also varied occasionally for their traits. Nevertheless, ADA-523 had a higher plant height, leaf length, leaf width, leaf fresh weight and leaf dry weight than the cultivars AGA and SASA-5. On the other hand, the cultivar SASA-5 had a higher shoot fresh weight, shoot dry weight and root fresh weight than the other cultivars in the study. This research work concluded that the forage maize cultivars in the study did not vary for the weed-competitive ability. Further, barnyardgrass-maize competition could decrease the growth and development of the maize cultivars.
Afficher plus [+] Moins [-]Quality Changes in Sous-Vide Cooked Meat Texte intégral
2020
Meltem Serdaroglu | Esra Derin
Sous-vide process is a cooking method for vacuumed products which are placed in a water bath or steam oven at controllable low temperatures and specific long times. This technique is widely used for cooking of meat and meat products which have limited shelf life throughout cold storage. Temperature, time and vacuum parameters used in sous-vide method are effective factors on meat quality. It is realised that meat tenderness increases with this technique due to cooking is performed at low temperatures. For the same reason, more water is retained in the texture and cooking losses are reduced. In addition to this, it is appeared that the sous-vide method provides protection of nutrient components that are water-soluble and/or adversely affected by high temperature applications, so that this method increases the nutritional value of meat. On the other hand, use of controllable cooking temperatures facilitates to reach targeted core temperatures in meat. With the help of homogeneous distribution of heat, even colour formation on meat can be observed. Oxidative reactions in the product are limited by the application of vacuum, so that product quality can be preserved for a long time. The risk of food safety as a result of low temperature applications in sous-vide cooking is eliminated by increasing cooking times. In this review, it is aimed to inform about effects of sous-vide cooking technique on meat quality under the heads of; texture, juiciness and cooking losses, colour, flavour, lipid and protein oxidation and microbial quality. Besides, the effects of sous-vide cooking method on quality parameters, different effects of sous-vide and traditional cooking methods on quality parameters were deeply discussed.
Afficher plus [+] Moins [-]The Effect of Organic Liquid Fertilizer Given in Different Periods on Grain Yield, Yield Components and Quality in Durum Wheat (Triticum durum L.) Texte intégral
2020
Arzu Mutlu | Timuçin Taş | Ali Beyhan Uçak
This study was carried out in order to determine the effect of organic liquid fertilizer applications on grain yield, yield characteristics and some quality trait of wheat in different periods in organic agriculture trial area. The trial was conducted in four replications according to a split-plot design in randomized blocks in trial area of the vocational Akçakale high school during the 2016-2017 and 2017-2018 growing season. Şölen 2002 and Edessa wheat varieties and organic liquid fertilizer and barnyard manure were used as materials in the research. Organic liquid fertilizer was applied in five different periods such as control, tillering, beginning of the bolting, the end of the bolting and the hearing, provided that the dose remained the same. According to the results of the research, the highest values were obtained in the end of the bolting of Şölen-2002 variety in terms of grain yield and yield components (spike length, spikelet number, number of grains per spike, grain weight per spike, plant height, hectoliter weight and thousand kernel weight). According to the results of two years, the highest grain yield (530.43 kg/da-1) was obtained in the end of the bolting application of Şölen-2002 variety. Since the first year of the study was warmer and more drought than the second year, While the yield and yield components decreased, the quality characteristics (protein and dry gluten ratio) increased. Due to the temperatures, Edessa variety had higher protein and dry gluten ratios than Şölen-2002 variety.
Afficher plus [+] Moins [-]Economic Performance of Rainbow Trout Farming in Turkey Texte intégral
2020
Mehmet Aydoğan | Osman Uysal | Serhan Candemir | Yunus Emre Terzi | Rahmi Taşçı | Tuba Beşen | Fatma Pınar Öztürk | Meltem Emre | Önder Eralp | Orhan Gündüz | Vedat Ceyhan
The purpose of this research is to measure the economic performance and development of rainbow trout farming in inland waters in Turkey. As a result of the research, it was determined that the farms use an average of 82% of their capacities. There was a negative relationship between the farm-scale and CUR, and as the farm scale grows, the CUR decreases. The average feed conversion rate (FCR) of the enterprises was calculated as 1.12. Fish capital (36.8%) had the largest share in active capital, and equity capital (87.2%) had the largest share in passive capital. Net profits of farms falling to one-tonne production capacity; it was calculated as 2.374 TRY in small-scale farms, 1.322 TRY in medium-scale farms and 1.896 TRY in large-scale farms. The proportional profit of farms was 1.08, 0.99, and 1.17, respectively. The average current ratio value of the examined farms was calculated as 3.67 and liquidity ratios as 3.55. As the farm's scale grows, current ratio values also increase, and large-scale farms had more cash assets than small and medium-scale farms. As a result of the research; It can be said that the trout-breeding farms in Turkey have current assets that can pay their short term debts. The average borrowing rate of farms was 0.16. In other words, 16% of the financial assets of the trout farms in Turkey were met from debts. The turnover rate of the assets of the farms was 0.79 and is below the sector average. The average rate of economic profitability of farms was calculated as 0.13. In other words, the income that farms generate from aquaculture is more than the opportunity cost.
Afficher plus [+] Moins [-]Determination of Total Phenolic Content and Antioxidant Activities of Different Sesame (Sesamum indicum L.) Genotypes Texte intégral
2020
Cemal Kurt | Burçak Uçar | Murat Reis Akkaya
Due to a better understanding of its positive effects on nutrition and health, consumer demands for sesame seeds and products have increased steadily in recent years. The aim of the study is to determine the total phenolic content belonging to 17 different sesame genotypes (with different seed color) and the antioxidant content by DPPH and ABTS methods. The total amount of phenolic substance varied between 1.99-6.81 mg GA/g, and the highest amount of phenolic content was obtained from the Libya genotype, while the lowest value was obtained from the Gaziantep-Oğuzeli genotype. While antioxidant activity values obtained according to DPPH method varied between 8.23 and 17.50 mg Trolox/g, antioxidant activity values obtained according to ABTS method ranged between 3.62 and 4.18 (mmol Trolox)/g. According to the correlation analysis, it was determined that there was a statistically significant and positive relationship between antioxidant capacities according to total phenolic content, DPPH and ABTS methods. However, no relation was found between the seed color and these properties.
Afficher plus [+] Moins [-]Effects of Gamma Irradiation on Seedlessness and Fruit Quality of Ortanique Tangor Texte intégral
2020
Berken Çimen | Turgut Yeşiloğlu | Yıldız Aka Kaçar
The existence of a large amount of seeds in citrus fruits results as a major impediment to customer acceptability, even if the fruits have high organoleptic properties. Irradiation, which mainly reduces seed number of varieties, is a faster way than hybridization. The use of irradiation in citrus breeding programs is now quite widespread with most programs in the major citrus producing countries actively developing new selections. The present study reports the primarily results of gamma irradiation on seed number and fruit quality of Ortanique tangor mutant population. The shoots of scion were irradiated with gamma rays from 60Co at the dose of 50 Gy (gray) in April of 2014. All the treated buds were then immediately budded onto rootstocks and the survival rate was recorded as 60.34%. In order to stabilize the mutation, mV3 plants were developed by re-budding and plants at mV3 generation were transplanted in the orchard in 2017. Within the following year, 68 mV3 plants out of 852 grown in the field bore sufficient amount of fruit and were screened in terms of 19 fruit quality characters such as seed number per fruit, fruit diameter and ripening index. Fruit diameters of mV3 population varied from 56.72 mm to 84.79 mm, and fruit weight ranged between 90.00 g and 287.60 g. The number of seeds per fruit ranged between 0.6 and 13.1 whereas seed number of non-irradiated Ortanique tangor was recorded as 10.7 in the same fruit crop year. In general, fruit characteristics such as fruit weight, fruit height and fruit diameter which describe fruit size of a big part of the population, were similar to Ortanique tangor. According to primarily results, 18 plants have been described as low seeded (≤4). In addition, a cluster analysis was performed by using Euclidean similarity coefficient and similarity index ranged between 29.29% and 93.10% regarding variables related to fruit. The stability of mutations detected is being evaluated and new commercial field trials will be established with the selected materials.
Afficher plus [+] Moins [-]Determination of the Chemical Composition, Antimicrobial Activity and Flavonoid Content of the Essential Oils of Cedrus libani and Pinus nigra subsp. pallasiana Texte intégral
2020
Ayşe Nur Demirci | Nazan Çömlekçioğlu | Ashabil Aygan
Essential oil composition, antimicrobial activity and flavonoid contents of leaf-fruits of Cedrus libani and Pinus nigra subsp. pallasiana were determined with GC-MS, disc diffusion method and HPLC in three different period. When the essential oil composition of leaf and fruits of P. nigra ssp pallasiana collected in April, July and September, major components were α-pinene, β-pinene, limonene, β-caryophyllene ve germacrene-D. On the other hand, additionally to these contents, myrcene and α–terpineol were also detected in C. libani. According to HPLC analysis, rutin, quercetin, kaempferol, naringin and resveratrol flavonoids were detected in different proportions. While rutin (154.33 µg g-) and resveratrol (20.02 µg g-) has the highest ratio in C. libani, quercetin (9.65 µg g-) and naringin (9.31 µg g-) were detected in P. nigra subsp. pallasiana along with rutin (39.66 µg g-). According to the antimicrobial activity results the essential oils of C. libani obtained in April has produced higher activity than that of July and September. On the contrary, the essential oils from P. nigra subsp. pallasina have produced the best antimicrobial activity on September compared to April and July. As a result, C. libani and P. nigra subsp. pallasiana essential oils have a composition showing antimicrobial activity and their harvesting season should be determined for the best and effective content.
Afficher plus [+] Moins [-]Effect of Calving Season, Calving Year and Lactation Number on the Milk Yield Traits in Holstein Cows Raising in Şanlıurfa Texte intégral
2020
Durhasan Mundan | Abuzer Kafar Zonturlu | Yahya Öztürk | Tuğra Akkuş | Cihan Kaçar
The aim of the present study is to investigate the impact of some environmental factors on the descriptive values of milk yield characteristics in Holstein cows. For this purpose, a total of 241 lactations belonging to 62 Holstein cows had been kept as breeders in a private establishment were evaluated for 7 years in terms of milk yield. When the recording system of the establishment was examined, the average values of lactation yield (LY), corrected 305 day milk yield (305-dMY), average daily milk yield (ADMY) and lactation length (LL) were 9356.2±126.1 kg, 8549.2±105.8 kg, 28.0±0.3 kg and 315.0±2.3 days, respectively. The least mean squares (LMS) of LY was calculated as 9324.9 kg. It was found that the effect of the calving season on the LY was statistically significant (P
Afficher plus [+] Moins [-]The Effect of High Amounts of Wheat Gluten Meal and Corn Gluten Meal Added to the Diets on Some Serum Parameters in Rats Texte intégral
2020
Recep Gümüş | Nazlı Ercan | Halit İmik
The aim of this study was to determine the effects on some serum parameters of wheat and corn gluten diet, which is also a high protein source. A total of 24 male rats aged 20 days and divided into 3 groups, each containing 8 rats were used in the study. The majority of the protein content in the diet of soybean meal as a Control group; in the diet of wheat gluten as a Wheat group; in the diet of corn gluten as a Corn group were composed. At the end of the study, blood samples taken from all animals were analysed. In the study, serum glucose, TP, urea, creatinine and BUN levels were found to be significantly decreased in Corn group compared to Wheat group. Serum ALT levels were similar with the Control and Wheat groups, but it was found to be significantly decreased in the Corn group. Serum AST levels were significantly lower in the Corn group. Serum GGT levels were significantly lower in both Corn and Wheat groups compared to Control group. Serum Ca and P levels were similar with all groups, whereas Mg levels were significantly decreased in Wheat and Corn groups compared to the Control group. As a result, it can be said that corn gluten added to the diet has more positive effects than wheat gluten in terms of both liver enzyme activities (AST, ALT and GGT) and renal parameters (Urea and BUN).
Afficher plus [+] Moins [-]