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Investigation of Risk Factors and Biosecurity Measures Associated with Prevalence of Newcastle Disease Virus in Broiler Farms
2020
Mirza Mienur Meher | Jaisan Islam | Marya Afrin
Newcastle disease (ND) is one of the major viral diseases of poultry, remains a constant threat in poultry farms that causes huge economic losses every year. However, little is known regarding the potential risk factors of the disease in broiler. The study was undertaken to ascertain the potential risk factors and biosecurity measures in ND prevalent broiler farm. A total of 116 broiler farms were considered as a sample size from a different area of Barishal district of Bangladesh in which 19.83% ND prevalence was found. In the findings, the farmers (33.62%) who had training on poultry farming, were significantly less ND positive case (7.69%). Besides this, among the different risk factors and biosecurity measures only shed location, ventilation, vaccination status, feeder and waterer cleaning frequency, visitors accession, pets in the farm, use of disinfectant and seasonal variation had significant effect on ND outbreak. However, among all the factors only farmers training (OR=0.025; 95% CI: 0.001-0.509), shed location (OR=0.035; 95% CI: 0.003-0.390), vaccination against ND (OR=0.017; 95% CI: 0.001-0.435) and use of disinfectant daily (OR=0.011; 95% CI: 0.000-0.294) made a unique statistically significant contribution to the regression model and the predictors had approximately similar strength on reporting ND outbreak. In completion, ND can be reduced in broiler farms by improving the level of common biosecurity, farm management practices, and minimizing the potential risk factors through training of farmers, awareness build-up, and enforcement of these practices on the farms.
Afficher plus [+] Moins [-]Adaptation and Some Quality Parameters of Cool Season Turfgrass Species in Samsun Conditions
2020
İlknur Ayan | Sedat Arslan | Zeki Acar
The aim of this study is to determine adaptation and quality parameters of some cool season turfgrass cultivars and species, In the scope of this study, leaf form, variation of leaf colour according to the seasons, tiller number, thinning ratio, weed ratio and general appearance of the species were determined. The experiment was established according to confounding design with four replications in Samsun Conditions at November, 2010. According to 1000 seed weight and characteristics of the plants seeding ratios were determined as pure and viable seed as follows; Lolium perenne 40 g m-2, Festuca rubra var. rubra and Festuca rubra var. commutata 30 g m-2, Festuca arundinacea 40 g m-2, Poa pratensis 20 g m-2, Festuca rubra trichophylla 30 g m-2, Agrostis stolonifera and Agrostis tenuis 5 g m-2, Festuca ovina 25 g m-2. According to the results obtained from this study it was determined that species/cultivars have some superiority to each other because of their different morphological and physiological characteristics. When we consider weed competition, Lolium perenne and Festuca arundinaceae cultivars have to be added to the mixture in order to decrease weed competition. There was colour variation distinctively depending on the seasons for all species. But, compare to the others, cultivars of Agrostis sp. and Poa pratensis cultivars have the potential to keep leaf colour in different seasons. Leaf form and appearance of Festuca rubra, Poa trivialis and Festuca ovina are better than the others. In order to keep good conditions of turfgrass areas, especially after cutting in summer period, Poa pratensis and Poa trivialis should added in mixtures to get benefit their higher regenerating power.
Afficher plus [+] Moins [-]Effects of Various Bioactivator Applications on Sapling Development of Passionflower and Guava Plantles
2020
Canan Nilay Duran | Gizem Demirkaplan | Sevinç Şener
Passionflower is a member of Passifloraceae family, it can be used as medicinal and ornamental plants in addition to its consumption as fruit in the world. Guava (Psidium guajava L.) fruits, which has a rich nutrient content, are consumed both fresh and processed. Passionfruit and guava plants, which can only be cultivated in temperate southern coasts in our country, have gained commercial importance because of the fruits' export potential, high medical importance and nutrient. This study was carried out to determine the effects of some bioactivator applications on the criteria of sapling growth and development of passionflower and guava plants. The experiment was conducted between 2018-2019 under greenhouse conditions. Saplings obtained from seed germination in Akdeniz University Faculty of Agriculture Research and Experiment Area were used as plant material. 3 different commercial preparations called Messenger, Crop-set and ISR-2000 were used as bioactivators. Plant height (cm), stem diameter (mm) and number of leaves (number / plant) were measured weekly, in order to determine the effect of the applications on the growth and development of saplings. At the end of the study, it was determined that the highest average plant height (10.17 cm), stem diameter (13.53 mm) were obtained in ISR-2000 application. The highest average plant height (11.93 cm), stem diameter (16.44 mm) and number of leaves (9.07 units / plant) were obtained from Messenger application in guava plant. When the results obtained are evaluated, it is recommended that ISR-2000 bioactivator can be applied in passionflower sapling cultivation and Messenger bioactivator can be applied for guava sapling cultivation.
Afficher plus [+] Moins [-]In Vitro Antibacterial Activities of Various Ethanolic Medicinal Plant Extracts Against Some Human Pathogenic Bacteria
2020
Samir K. Ali | Ghorbat S. Ali | Berivan Abdulrahman Abdullah
The widespread use of antibiotics often causes increase in the bacterial drugs resistance and causes many side effects in humans. Medical plants have antimicrobial effects against most pathogenic bacteria and can serve as harmless replacement to antibiotics. The aim of this study was to assess the antibacterial effect of five medicinal plant prevailed in Kurdistan region namely; Cinnamon (Cinnamomum cassia (L.) D.Don), Nigella (Nigella sativa L.), Allium (Allium hirtifolium Boiss.), Carrot (Daucus carota L.), and Fennel (Foeniculum vulgare Mill.) against pathogenic Gram positive bacteria (Staphylococcus aureus), and pathogenic Gram negative bacteria (Salmonella typhi and Escherichia coli). The evaluation of antibacterial activity for these plant extracts was carried out using agar-well diffusion method. Results showed that minimum inhibitory concentration (MIC) of A. hirtifolium against tested bacterial isolates were (25 mg/mL), the lowest MIC values for S. aureus were (25 mg/mL) observed with C. cassia, N. sativa and F. vulgare ethanolic extracts and the lowest MIC of D. carota against bacterial isolates were (50 mg/mL), Also, it was observed that S. aureus was more sensitive than S. typhi and E. coli to plant extracts. The ethanol plant extracts had potential antibacterial activities. However, further studies are required to identify the active compounds which could be used for the preparation of new antimicrobial agents and control the bacterial infectious diseases.
Afficher plus [+] Moins [-]Assessment of Pedotransfer Functions for Saturated Hydraulic Conductivity of Anatolian Soils
2020
Gülay Karahan
Hydraulic conductivity is an essential base for applied research in soil and water management, landscape, and environmental disciplines. Saturated hydraulic conductivity (Ksat) is one of the most important soil physical properties, which is considered in the planning of irrigation and drainage and predicting other soil hydrological processes. However, it has been frequently reported that measurement of Ksat is laborious, time-consuming, and expensive due to its high spatial variability and this has motivated researchers to develop indirect methods such as pedotransfer functions (PTFs) for developing Ksat-database in regional and national scales. In this study, eight Ksat studies with the PTFs in Anatolian soils were reviewed. PTFs were evaluated regarding their type, predictors used, and their performance. The majority of studied PTFs were developed on alluvial, colluvial, and alkaline soils in semi-arid and semi-humid climates. Multiple linear regression (MLR) and artificial neural networks (ANNs) have been common PTFs, and soil texture, bulk density, organic matter content, and pH have been common predictors used with these PTFs. Root mean squared error (RMSE), mean absolute error (MAE), and coefficient of determination (R2) were the commonly used criteria in the verification and validation of the PTFs. Studies on the use of Ksat and PTFs are inadequate, and researches are still needed to be able to use it nationwide and can develop an adequate database. According to the results of PTF studies, the highest R2 and correlation coefficient (r) values belong to the Rosetta and MLR types of the PTFs, respectively. The lowest RMSE value was obtained with the equations in which the physical and chemical soil properties were used together as input data for PTFs. In addition, it has been noted that the soil morphological properties should be used as input data in PTFs studies, especially in Ksat estimation.
Afficher plus [+] Moins [-]Designing Rice for the 22nd Century: Towards a Rice with an Enhanced Productivity and Efficient Photosynthetic Pathway
2020
Rabin Thapa | Nabin Bhusal
Rice (Oryza sativa L.) has been cultivated as an important cereal crop for more than 9,000 years and more than half of the world’s population depend on rice as it is their primary source of energy. Almost 30% of the current world cereal production is represented by the rice alone. It is estimated that the world’s population will reach 9.1 billion by 2050 i.e. 34 percent higher than today and for ensuring an ample amount of food and nutrition to such large population, global consumption of cereals will need to increase from 2.6 to 2.9 billion tonnes by 2027. On the other hand, the impacts of climate change in agriculture are expected to be negative, threatening the global food security. Besides, agriculture and global food security will be severely affected due to the COVID-19 pandemics as its after-effects are yet to be ascertained. The world needs an introduction of a new “Green revolution” in agriculture to increase crop production for food security and biofuel, because conventional breeding method have not brought much of gains not keeping its pace with the world population growth. Hence, the current study was done to review the various ongoing approaches and possible ways of designing a rice with enhanced productivity and photosynthetic capacity. One of the ways to increase yields, photosynthetic capacity accompanied by an increased Water Use Efficiency (WUE) and Nutrient Use Efficiency could be to introduce C4 traits into rice. Besides, genetic engineering using CRISPR-Cas9, molecular breeding, developing ideotype, heterosis breeding, developing apomictic rice, nitrogen fixing rice, use of nanotechnology as well as precision farming are the probable future approaches for designing a rice with high productivity. However, there are challenges and limitations in developing such rice and further research in this matter could help us get closer to developing the future rice.
Afficher plus [+] Moins [-]Effect of Nitrogen On Growth and Yield of Chili (Capsicum annuum L.) in Roof Top Garden
2020
Khalid Mahmud | Taslim Hossain | Tamanna Haque Mou | Asraf Ali | Monirul Islam
The present study was carried out to evaluate the effect of nitrogen on growth and yield of chili (Capsicum annuum L.) under rooftop conditions. The single factorial experiments were laid out in Randomized Complete Block Design (RCBD) with three replications. Four levels of nitrogen N0: 0 kg N ha-1, N1: 90 kg N ha-1, N2: 110 kg N ha-1 and N3: 130 kg N ha-1 were used in this experiment. Growth and yield contributing parameters significantly influenced by different doses of nitrogenous fertilizers. The dose of N2 gave the highest plant height (80.97 cm) and most of the morphological parameters increased with increasing nitrogen levels up to N2. The treatment N3 gave the highest fruit length (4.93 cm), yield of fruits plant-1 (165.33 gm), average fruit yield plot-1 (0.66 kg), individual fruit weight (1.97 g) and average fruit yield (5.533 kgha-1). Based on the present results, it can be suggested that use of 130 kg N ha-1 increased plant growth and fruit yield of chili in rooftop garden.
Afficher plus [+] Moins [-]Comparison of Orchard-grass and Sweet Maize for Doubled Haploid Plant Production via Wide Hybridization in Bread Wheat
2020
Süleyman Avcı | İmren Kutlu
In this study, the potential of haploid regeneration was investigated in hybridization of six bread wheat F1 hybrids known response to another culture with orchard-grass (Dactylis glomerata L.) and sweet maize varieties (Baron, Challenger and Merit). A total of 150 wheat spikes were pollinated with orchard grass and sweet maize and 2730 pseudo-seeds were produced. Although the high rate of developed pseudo-seeds was developed from bread wheat F1 hybrids × orchard-grass, no embryos were produced. Developed pseudo-seeds (2057 number) of bread wheat × sweet maize produced 53 haploid embryos and only 8 of them were regenerated. Developed green plantlets were vernalized and applied colchicine and only four of them produced fertile seeds. The highest rate (5.9) of haploid embryo formation within wheat genotypes was determined in DH20 × Kate A-1. Although the highest haploid embryo formation was observed in Challenger with 3.5% among sweet maize genotypes, it had no effect on plant regeneration. Also, the mixture of pollen of sweet maize varieties increased haploid plant regeneration. It has been observed that some F1 hybrids such as DH20 × Kate A-1 and DH6 × Altay 2000 with low anther response gave better results in terms of haploid embryo formation and regeneration. The means of fertile spike percentages and number of seeds per fertile spike were 26.75% and 9.83, respectively in developed green plants. As a result, bread wheat × sweet maize hybridization will be a good alternative to obtain a homozygous line in a short time in bread wheat genotypes with low anther response.
Afficher plus [+] Moins [-]Klasik Homojenizasyona Kıyasla Yüksek Enerjili Ultrason Uygulamasının Sütün Homojenizasyon Etkinliğine ve Süt Yağ Globül Boyutuna Etkisi
2020
Vildan Akdeniz | A. Sibel Akalın
Sütün yağ globül boyutu, süt ürünlerinin kalitesini özellikle duyusal ve reolojik özelliklerini önemli ölçüde etkilemektedir. Bu sebeple pek çok süt ürününün üretiminde yağ globüllerini küçültmek amacıyla homojenizasyon işlemi uygulanmaktadır. Bu çalışmada, 4 farklı güçte (90W, 180W, 300W ve 400W) 15 dakika süreyle süte uygulanan ultrasonik homojenizasyon işleminin 150 bar basınçta tek kademeli klasik homojenizasyona ve 150/50 bar basınçta çift kademeli klasik homojenizasyona kıyasla yağ globül boyutuna ve homojenizasyon etkinliği üzerine etkisi incelenmiştir. Farklı metotlarla homojenize edilen süt örneklerinin homojenizasyon etkinlik değeri % olarak, lazer kırınımı prensibiyle çalışan cihazlarla Dv 0,99, Dv 0,90, Dv 0,50 hacimsel çap değerleri mikrometre (µm) olarak ve süt yağ globül boyutları nanometre (nm) olarak belirlenmiştir. Ayrıca tüm süt örneklerinde yağ globüllerinin mikroskobik görüntülenmesi gerçekleştirilmiştir. Ultrason işleminin hem tek kademe hem de çift kademe klasik homojenizasyon işlemine göre süt yağ globül çaplarını küçültmede daha etkili olduğu belirlenmiştir. Uygulanan ultrason işleminin gücü arttıkça süt yağ globül çaplarını küçültme etkinliği de artmış ve yağ globül boyutundaki en fazla küçülme 400W 15 dakika ultrason uygulamasında saptanmıştır.
Afficher plus [+] Moins [-]The Effect of Feeding on Environmental Pollutant Emissions in Broiler Production
2020
Özgün Işık | Figen Kırkpınar
Environmental pollution is defined as the disruption of normal ecological balance with emmision of various substances and energy residues as a result of human activities. Animal production is one of the major human activity that enables this emission to increase significantly. Although ruminants play an important role in the effects of animal production on environmental pollutant emissions, the effects of poultry production and broiler production are also worth considering. As in all livestock types, the main factor that has a direct impact on environmental pollutant emissions is feeding for this animal types too. High nutrient needs of broilers and production processes of feed containing these nutrients; greenhouse gas causes increased nitrogen and phosphorus emissions; consequently, they cause air, soil and water pollution to multiply. Changes in protein and amino acid levels or the use of certain feed additives in feeds affect the emission value of broiler production. In addition, the feeding methods also has an effect on these emission values. When these effects are taken into consideration, it is possible to reduce the emission values in broiler production. In this review, environmental effects of broiler nutrition examined in terms of feed production, nutrient emission by manure, presentation of feed and feed form.
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