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Результаты 1171-1180 из 3,412
Combining Pasture- and Animal-Based Factors to Predict Herbage or Dry Matter Intake of Lambs Grazing on Cocksfoot, Meadow Fescue and Tall Fescue Pastures
2024
Ahmet Akdağ | Nuh Ocak | İbrahim Aydın
In this study, it was aimed to establish the correlations between actual dry matter intake (DMI) and some animal (body weight, (BW)) and pasture (crude protein (CP); neutral detergent fiber (NDF); in vitro dry matter digestibility (IVDMD); dry matter yield (DMY); herbage allowance (HA); herbage mass (HM); metabolizable energy (ME); relative forage quality (RFQ); total digestible nutrients (TDN)) based factors to formulate precise regression equations for DMI prediction. For this purpose, data (n = 36, 2 years × 3 blocks × 6 data collection) were utilized for two grazing seasons (2020–2021) on cocksfoot (Dactylis glomerata), meadow fescue (Festuca pratensis) and tall fescue (Festuca arundinacea) mixed pastures with Karayaka male lambs at an average age of 2 months for 60 days in each season. Positive correlations were determined between DMI and BW (0.777), HA (0.814), DMY (0.844), and NDF (0.609), while DMI had negative correlations with IVDMD (-0.738), RFQ (-0.357), CP (-0.209), TDN (-0.177) and ME (-0.039). In addition, animal and pasture–based factors were evaluated by principal component analysis to determine the in–cooperating variables in variance. As a result, equations were developed by using parameters with high correlation coefficient and the best–fit 3 equations for predicting DMI of lambs grazing cocksfoot, meadow fescue and tall fescue pastures: (I) -1224.09 + 39.90BW (kg) + 33.69HA (kg DM/ kg BW) + 8.22NDF (% of DM), r2=0.815, II) -701.47 + 18.96BW (kg) + 673.61DMY (kg/ per square meters) + 8.19NDF (% of DM), r2=0.807, III) -325.32 + 43.49HA (kg DM/kg BW)-2.21IVDMD (%) + 8.57NDF (%), r2=0.786).
Показать больше [+] Меньше [-]Farklı Gelişme Tabiatlı Arpa Çeşitlerinin Vernalizasyon Sürelerine Tepkisi
2024
Mazlum Erdem | Fahri Sönmez | Nurselin Yılmaz | İbrahim Saygılı
Vernalizasyon bazı bitkilerin erken gelişme dönemlerindeki düşük sıcaklık ihtiyacıdır. Bu bitkilerin vejetatif dönemden generatif döneme geçiş yapabilmesi için belli bir süre düşük sıcaklıkta kalmaları gerekir. Bu çalışma bazı arpa çeşitlerinin vernalizasyon uygulamalarına tepkilerini belirlemek amacıyla yürütülmüştür. Dört kışlık, iki alternatif ve iki yazlık arpa çeşidinin kullanıldığı bu araştırma tesadüf parsellerinde faktöriyel deneme desenine göre üç tekerrürlü yürütülmüştür. Arpa çeşitlerinin çimlenmiş tohumları torf içeren küçük kaplarda 0, 4, 5 ve 6 hafta süreyle 2°C’de vernalizasyon uygulaması için bekletilmiştir. Gelişen fideler saksıya aktarılmış ve serada 22 saat ışık/2 saat karanlıkta 22°C sabit sıcaklıkta yetiştirilmiştir. Bitkilerde sapa kalkma süresi, başaklanma süresi, olgunlaşma süresi, fertil kardeş sayısı, başakta tane sayısı ve bin tane ağırlığı belirlenmiştir. Vernalizasyon uygulamalarının incelenen bütün karakterlere etkisi çeşitlere göre önemli derecede değişmiştir. Araştırmada kullanılan kışlık çeşitler Sladoran, Alba, Dicktoo ve Aydanhanım vernalizasyon ihtiyacı karşılanmadan başaklanamamışlardır. Bu çeşitlerde başaklanma süresi göz önüne alındığında dört haftalık vernalizasyon uygulamasının yeterli olduğu belirlenmiştir. Dört haftalık vernalizasyon, alternatif çeşitler Tokak 157/37’de 9 gün, Kearney’de ise 40 gün daha erken başaklanma sağlamıştır. Yazlık çeşitlerde vernalizasyon uygulaması belirgin bir değişikliğe neden olmamıştır. Vernalizasyon uygulaması süresince geçen süre de göz önüne alındığında bütün kışlık çeşitler için dört haftalık vernalizasyon süresi en uygun süre olarak görülmektedir. Alternatif çeşitler için vernalizasyon uygulaması ise genotipe bağlı değişken olduğundan dolayı, bu çeşitlerin ıslah programlarında kullanımı durumunda mutlaka vernalizasyon sürelerinin belirlenmesi gerekmektedir.
Показать больше [+] Меньше [-]Microbial Exopolysaccharides, Their Structures, Formation Mechanisms, and Effects on Human Health: Food-Related Microorganisms
2024
Afranur Özçoban | Ayşe İlayda Boyacı | Hale İnci Öztürk
A biofilm is a complex matrix formed by microorganisms that includes exopolysaccharides, proteins, extracellular DNA, various enzymes, and the microorganisms themselves. Biofilm cell is a more stable form of microorganism than planktonic cell. Microbial cells attach themselves to the surface after certain signals or changes, colonize to create a more favorable environment for their growth and viability, and secrete exopolysaccharide. This component is the basic matrix of biofilm. The diversity of exopolysaccharides within biofilms varies significantly depending on their specific composition, contributing uniquely to the characteristics of biofilms. This diversity in biofilms underscores the need for targeted control strategies. Biofilms can be beneficial or harmful depending on the situation and where they develop. Accordingly, microbial biofilms have dual effects on health. Biofilms can have both harmful effects on health, such as contributing to antibiotic resistance and persistent infections, while biofilms formed by beneficial microorganisms play a crucial role in enhancing food functionality. Moreover, the formation of biofilm in certain foods can contribute to the enhancement of the product matrix, particularly by improving its texture. In this review, the structures of these biofilms, their basic components, their possible safety concerns, and health benefits are discussed. Moreover, this review deals with biofilm producing bacteria in foods and assesses the prevention strategies for biofilm formation within the food industry.
Показать больше [+] Меньше [-]The Effects of Starvation Duration on the Growth Performance, Feed Cost, and Water Quality in Common Carp (Cyprinus carpio)
2024
Birol Baki | Oylum Gökkurt Baki | Gülşen Uzun Gören
The present study investigated the effect of starvation periods on growth performance, feed cost, and water quality in common carp (Cyprinus carpio). Two different starvation methods were implemented, with an average weight of 120.69±3.47g over a 45-day trial. Group D1 was subjected to a 1-day fasting/2-day feeding regimen, whereas Group D2 adopted a 2-day fasting/1-day feeding regimen. The control group (C) was fed twice daily to satiation. At the end of the trial, the average weight of the fish was 200.88±14.62g in the control group, 189.11±21.05g in Group D1, and 130.04±10.49g in Group D2. The specific growth rates were 1.13±0.08% (C), 1.00±0.05% (D1), and 0.17±0.06% (D2), respectively. Feed conversion ratios were 1.81±0.01 (C), 1.32±0.02 (D1), and 4.43±0.05 (D2), respectively. There were significant differences between the control group and Groups D1 and D2 in terms of dissolved oxygen (mg/L) and pH values of the water. Group D2 yielded lower feed costs due to reduced feed usage. The average weight gain analysis showed that the unit feed cost of Group D2 was 3.4-fold higher than that of Group D1 and 2.5-fold higher than that of the control group. The application of starvation periods in feeding common carp had significant effects on the growth, feed utilization, water quality, and feed cost.
Показать больше [+] Меньше [-]The Biopotential of Bacterial Bioagents Isolated from Compost in Suppressing Botrytis cinerea and Sclerotinia sclerotiorum
2024
Özden Salman | Raziye Koçak | Züleyha Endes Eğribaş
Recycling plant residues through various processes is essential for addressing waste issues in our country, because it contributes to the protection of the environment and ecosystems. Composting is one of the most important recycling methods for plant residues. Composts are not only natural, but they also enhance soil fertility and exhibit fungitoxic properties on the mycelial and spore germination of fungi. This study aimed to isolate bacterial bioagents from compost derived from various agricultural and household organic wastes, and to assess their antagonistic potential against important plant pathogens Botrytis cinerea and Sclerotinia sclerotiorum under in vitro conditions. A total of eight bacterial isolates were obtained, identified as belonging to Bacillus spp. Dual culture tests were used to evaluate the potential of these bacterial candidates to inhibit the mycelial growth of phytopathogenic fungi. In vitro trials revealed that six bacterial isolates exhibited varying degrees of antagonistic effects (23.3%- 63.3%) on the mycelial growth of B. cinerea. Among the tested bacteria, two isolates were effective against S. sclerotiorum, demonstrating antifungal activity ranging from 80% to 83.3%. The results indicate that composts provide a favorable environment for microorganisms with antagonistic potential, suggesting that these cultivation environments could play a significant role in the biological control of fungal pathogens in agriculture. In conclusion, this study contributes to the development of sustainable agricultural practices by ensuring a more efficient utilization of organic waste.
Показать больше [+] Меньше [-]Evolution of Parasitoidism in Hymenoptera
2024
Sevda Hastaoğlu Örgen | Mehmet Gülmez
Insects, the most diverse group of animals, are known to benefit society for a sustainable future. By focusing on the use of natural enemies of pests, including parasitoids and predators, the need for biological pest control for the conservation of agricultural crops has been emphasized. Parasites are organisms that live in the body of another organism and feed on it without killing it, while predators hunt, kill and eat their prey. Parasitoids, on the other hand, live in or on another organism and feed on it, ultimately killing the host. Our study highlights the use of parasitoids to control pests in agriculture and describes the parasitoid lifestyle as an evolutionary transition between parasitism and predation. It also notes that parasitoid larvae typically require only one host to complete their development and can be used to control a wide range of pests. The aim of this study was to determine the origin of the parasitic life form of order Hymenpotera, the mechanisms revealed by the parasitic life form, the importance of life strategies, the types of parasitism and to evaluate the important insect groups belonging to the order Hymenoptera used in biological control.
Показать больше [+] Меньше [-]Haematological Indices and Fertility Potential of Rabbits Receiving Camels Foot (Piliostigma thonningii) Essential Oil Supplemented Diet
2024
Emmanuel Anaso | Olurotimi Olafadehan | Ijeoma C. Chibuogwu | Ayoola J. Shoyombo | Samuel Mailafia | Joy N. Anaso | Emeka Solomon Fidelis
The current study aimed to evaluate Piliostigma thonningii seeds-derived essential oil (PTO) effect on hematological and reproductive parameters in rabbits. Three groups consisting of 15 animals each were randomly assigned and with an average initial body weight (BW) of 262.89 ± 22.36 g in a fully randomised experimental design. Group 1 received the control diet, while for groups 2 and 3 the basal control diet was supplemented with 2 mL PTO/kg diet and 4 mL PTO/kg diet, respectively. At the end of the experiment, blood samples were collected and the blood was analysed using the ABACUS ROSS haematology analyser. The results indicated significant differences in rabbits receiving PTO supplemented feed, namely; Packed cell volume, red blood cells, white blood cells, mean corpuscular haemoglobin concentration, neutrophil increased (P<0.05) with increasing level of PEO supplementation. Mean corpuscular volume and haemoglobin, lymphocyte, monocyte and platelet were higher (P<0.05) in T2 and T3 than in T1. Neutrophil/lymphocyte ratio was higher (P<0.05) in T3 than T1 with T2 being intermediate (P>0.05) between T1 and T3. Semen volume, concentration and motility were higher (P<0.05) in T2 and T3 than in T1. While semen abnormalities and bucks’ reaction time to does (libido) were greater (P<0.05) in T1 than in T2 and T3, Live dead ratio was higher (P<0.05) in T3 relative to T1 while T2 was intermediate between T1 and T3 (P>0.05). semen color and pH were not affected (P>0.05) by treatments. It was therefore concluded that P. thonningii essential oil supplementation enhanced both haematological and fertility potential of the experimental rabbits.
Показать больше [+] Меньше [-]Investigation of Chromosome Numbers and Plant Characteristics of Triticum compactum × Triticum turanicum Interspecific Hybrid in F2 Generation
2024
Gülcan Eser | Oğuzhan Önal | Feyza Yıldırım | İmren Kutlu
The objective of this study was to identify the plants with varying chromosome numbers in the F2 generation, resulting from interspecific hybrids between hexaploid Triticum compactum and tetraploid Triticum turanicum, and to examine the morphological, physiological and agronomic characteristics of these plants. Therefore, the objective was to assess the potential for developing monosomic lines (particularly pentaploid) for the D-genome of wheat, with a view to their utilization in future breeding programs of wheat, and to ascertain the correlation between the estimated chromosome numbers and the superior phenotypic characteristics of the plants in question. The germination percentage was determined by germinating 230 seeds, which will form the F2 generation of Triticum compactum × Triticum turanicum interspecific hybrid, in Petri dishes together with the parents. Thereafter, the plants were transferred to 2 m long rows, 30 cm between rows and 10 cm above rows. The F2 plants were subjected to evaluation in order to ascertain their morphological, physiological and agronomic characteristics. Furthermore, the nuclear DNA contents of the F2 plants were determined by flow cytometry, and chromosome numbers were estimated based on the DNA contents of the parents. Finally, the correlations between the estimated chromosome numbers and the measured plant traits were determined. The nuclear DNA contents of F2 plants exhibited variability, with values ranging between 7870.39 and 11632.1 pg. Additionally, three plants with 35 chromosomes were identified. The F2 plants showed superior physiological traits compared to the parents, however, they displayed lower values for spike traits that affect yield. The superior traits had by F2 plants can be observed in subsequent generations, thus providing a valuable genetic resource for breeding programs and certain genomic studies.
Показать больше [+] Меньше [-]Spatial Evaluation of Carp Production by Using Geography Information Systems (GIS) in the Anatolian Region of Türkiye
2024
İlknur Uçak | Muhammed Cüneyt Bağdatlı | Maliha Afreen
Fish industry has significant importance all over the world because red meat is not enough to complete the protein requirements of growing population. Therefore, focus is now on those fish species production rate which are more suitable. In this study we focused on common carp which has important commercial value due to its size and tasty meat. Common carp is a fresh water fish and mostly found in rivers, ponds, dams and lakes. It is special due to its ability of adjustment in any aquatic habitat and sometimes beneficial also for other aquatic animals by releasing nutrients in habitat. Türkiye is a rich country in terms of rivers, dams and lakes. In this research, we described famous water reservoirs in Türkiye and in which regions higher amount of carp fish produced. It was focused on Central Anatolian Region of Türkiye which has large amount of water reservoirs. Geography Information System (GIS) based mapping and spatial analysis was used in this study to check the production rate of carp in Central Anatolian Region of Türkiye for long period from year 2000 to 2019. It was concluded from this study that highest average production rate of carp is obtained in Konya province (total: 11919,2 tons/2000-2019; average: 596 tons/20 year) which is west part of Anatolian region and lowest average production rate is found in the Niğde province (total: 163,5 tons/2000-2019; average: 8,2 tons/20 year) which is south part of the Central Anatolian Region.
Показать больше [+] Меньше [-]St John’s Wort (Hypericum perforatum L.) in Broiler Nutrition
2024
Özgün Işık | Helin Atan | Figen Kırkpınar | Ayşe Betül Avcı
Nowadays, the concept of sustainability is important in poultry meat production as in every field. The health status of the birds must be well-stated for sustainable broiler production. Considering that synthetics attract reactions and some of them are banned or limited, the use of natural feed additives for health protection has been the focus of research attention. St John’s wort is a plant that can positively affect the health of animals with bioactive components such as the hypericin it contains. St John’s wort or hypericum (Hypericum perforatum L.) has antiviral and antimicrobial effects in broilers and positively affects on blood biochemical parameters. This positive effect on health level also improves performance. The review aims to give information about St John’s wort and to examine a limited number of studies on their use in the diet of broilers.
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