The ratio of the water and food consumption of chickens and its significance in the chemotherapy of coccidiosis     

R. B. Williams 《Veterinary research communications》1996,20(5):437-447

An investigation was made of the relationship between the water and food consumption of healthy and sick chickens. Using coccidiosis as a disease model, and uninfected chickens as healthy controls, male birds of an egg-production breed and males and females of a meat-production breed were found to have simultaneously reduced water and food intakes 4 days after infection with Eimeria acervulina or E. maxima, and from 4 to 6 days after infection with E. tenella. This phenomenon was associated with reduction of weight gains and poor food conversion ratios. Whether birds were healthy or sick, and regardless of the degree of reduction of dietary intake, there was a more or less constant relationship between their food and water consumption. The ratio of the weights of water and food consumed had a value of about 1.9, with a range of 1.1–2.4. It is concluded that neither water nor food has an advantage over the other as a vehicle for chemotherapy. However, other factors, such as ease and speed of administration, and avoidance of adsorption onto food particles, favour the drinking-water route.Abbreviations FCR food conversion ratio - WFR water-food intake ratio  相似文献   

菌糠配合饲料饲养肉用仔鸡试验   总被引：1，自引：0，他引：1  

何华奇  潘勇 《畜牧与兽医》1996,28(4):147-149

用菌糠替代肉用仔鸡基础日粮中的玉米，替代量从占日粮的１０％至全部替代，６周末统计空腹活重、料重比、成活率等。经方差分析表明，菌糠可以完全替代玉米，各组生产性能与对照组相比，差异不显著。  相似文献   

金黄甘薯脯和甘薯虾片等加工技术的研究     

杨泌泉  吴卫国  周细军  罗剑龙  胡新民  屠纯国 《湖南农业大学学报(自然科学版)》1993,(3)

总结了金黄甘薯脯、甘薯虾片和油制低脂甘薯片的加工技术研究结果.金黄甘薯脯必须在制作的全过程中抑制酶促褐色和非酶褐变,用筛选出的最佳护色液,配合其它措施,采用3次糖煮工艺,方能得到金黄透明,又具适度咬劲的制品.甘薯虾片是以70%～100%的甘薯精白淀粉为主料加工,按筛选出的最佳配方制成含水量10%的坯片,在190℃油温浸炸20S,可得膨化度大,酥脆香鲜的成品.油制低脂甘薯片是以鲜甘薯片为原料,经防褐护色、上蛋衣、涂油膜,改传统的油炸熟制方法为微波加热熟制法而得到的色香味俱佳的产品.  相似文献   

Quantitation of serum phospholipase A2 by enzyme-diffusion in lecithin agar gels. A comparative study in man and animals     

E Westermarck  L A Lindberg  M Sandholm 《Acta veterinaria Scandinavica》1984,25(2):229-241

A sensitive gel-diffusion assay for determination of phospholipase A₂ was developed. PLA₂ standards, serum, faecal and pancreas homogenate samples with PLA₂-activity were allowed to diffuse from wells into agar-gels containing lecithin-membranes. The turbidity cleared radially upon PLA₂-activity. The diameters of the cleared zones showed a linear relationship with the log of the enzyme concentration. Serum samples resulted in some turbidity within the cleared zones. This interference originating from serum lipoproteins could be abolished by hydrophobic absorption. The gel-diffusion method was compared with two other methods for PLA₂, titrimetric and radiometric techniques. Analysis on 37 human patients with acute pancreatitis showed close interrelationship between these methods. The phospholipase A₂ activity in sera from man, the dog, the horse, the cow, the pig and the cat were almost equal, but much less than in the albino rat. No significant differences between PLA₂ activities in pancreatic samples were obtained in different animal species. Of the faecal samples, the cow had the lowest PLA₂ activity. Dogs suffering from pancreatic degenerative atrophy (PDA), had significantly reduced PLA₂ activity both in their pancreas and faeces but not in serum.  相似文献   

对加快发展吉林省绿色食品产业的思考   总被引：1，自引：0，他引：1  

王艳华  许晓晖  王洪斌 《吉林农业大学学报》2003,25(4):473-476

阐明了吉林省发展绿色食品的意义，介绍了吉林省绿色食品发展的现状，分析了吉林省绿色食品产业存在的问题，提出了搞好绿色食品市场建设、培育绿色食品龙头企业和生产基地，加大对绿色食品的扶持力度、建立健全专业管理体系和质量监测体系等、发展绿色食品产业的对策。  相似文献   

The storied nature of agriculture and evaluation: A conversation   总被引：2，自引：1，他引：1  

Yvonna S. Lincoln  Laurie G. Thorp  Craig Russon 《Agriculture and Human Values》2003,20(3):267-276

  相似文献   

AA级绿色稻米生产中水稻负泥虫的综合防治     

郭卜  黄爱斌  史峰 《北方水稻》2003,(5):20-21

负泥虫在山区稻田普遍发生,特别是AA级绿色稻米生产基地往往发生严重。因此,科学有效地防治负泥虫对绿色稻米生产意义重大。本文介绍了AA级绿色稻米负泥虫的形态特征、发生规律及防治方法。  相似文献   

稻田群落食物链结构优化与生态经济效益分析     

黄冲平  王华仁  王天根  唐天明  范忠信 《浙江大学学报(农业与生命科学版)》1995,(2)

双季连作稻田引入萍，鱼，螺组成一定的群落食物链后，稻田的系统生产力显著提高。对稻田绿萍的消长因素和萍－鱼食物链行为进行计算模拟的结果表明：在纯稻田的稻－萍－鱼系统放养草鱼夏花的数量以４５０００尾／ｈｍ￣２为宜。田塘式稻－萍─鱼夏花草鱼苗可放养７５０００尾／ｈｍ￣２．稻田组建群落食物链对水稻生长无明显不利影响，且有增产作用。  相似文献   

宠物犬犬粮的选择技术     

吴孝杰  李和国  马进勇  张铎  郭志明  潘越博  李宣延 《畜牧兽医杂志》2019,(3):45-47

宠物热的兴起,同时带动了一系列宠物行业的发展。宠物食品占据宠物用品的主要部分。然而,宠物主人在购买犬粮时存在很多疑惑。本文从犬粮的类型、选择犬粮的依据及优质犬粮的特点等方面进行阐述,以达到为宠物主人提供参考的目的。  相似文献   

Feeding ecology of four livestock species under different management in a semi-arid pastoral system in South Africa     

Igshaan Samuels  Clement Cupido  Melvin B Swarts  Anthony R Palmer  Jamie W Paulse 《African Journal of Range and Forage Science》2016,33(1):1-9

The Leliefontein communal area in Namaqualand is grazed by mixed species herds that have multiple benefits for pastoralists. This study assessed how the management (herding and free-ranging) of different livestock herds affects their feeding ecology during the wet and dry seasons in a semi-arid shrubland. By using direct observations of livestock grazing in the field, we established their habitat preferences, diet selection and resources overlap. Results indicate that all free-ranging livestock can be considered grazers with cattle being selective. When sheep are herded, they tend to be more generalist feeders and herded goats are browsers. Livestock diet selection and forage preferences are largely linked to the habitats in which they graze and browse. Dietary overlap is highest between free-ranging livestock irrespective of season, whereas herded livestock are able to consume a food source with little potential competition from other livestock. Although the wet-season annual forage resources are able to sustain the livestock population in Leliefontein, this study concludes that the overdependence on annual vegetation would make livestock vulnerable during drought periods when forage production is low.  相似文献