維生素及其在動(dòng)物營(yíng)養(yǎng)中的作用(英文版)課件

1、 Name: Zhang enshuangName: Zhang enshuang NO. NO. ： 維生素及其在動(dòng)物營(yíng)養(yǎng)中的作用(英文版) The vitamin is a kind of trace organic substance that the human and animal must obtained from foods to maintain normal physiological functions,and plays an important role in human growth, metabolism and development. NOTICE: Vita

2、mins neither participate in the forming of human cells nor provide energy for the body.維生素及其在動(dòng)物營(yíng)養(yǎng)中的作用(英文版) Based on the different solubility, the vitamins can be divided into the fat soluble-vitamins and water-soluble vitamins.vitaminsWater-solubleVitamin CB vitaminsFat- solubleVitamin A D,E,K維生素及其在

3、動(dòng)物營(yíng)養(yǎng)中的作用(英文版)VitaminFunction?Deficiency?Sources?維生素及其在動(dòng)物營(yíng)養(yǎng)中的作用(英文版) Functions: 1.The Vitamin A can maintains normal eyesight and prevent nyctalopia(夜盲癥）夜盲癥）and dry-eye disease. Rhodopsin（視紫質(zhì)） is an important part of the retina(視網(wǎng)膜)If animal lacks vitamin A, It can not synthesize enoenough rhodopsin

4、, which could lead to night blindness.2. VA is related to regulation of nutrient metabolism.Vitamin A has something to do with the metabolism of carbohy-drate ,fat,protein and mineral.In fact, it plays a role of regu-lating.維生素及其在動(dòng)物營(yíng)養(yǎng)中的作用(英文版)Deficiency Lacking of vitamin A for a long time ,the anim

5、al would suffers from the night blindness.Growth and productivity slow down.The laying rate and the hatching rate of the poutry show a downtrend. The fur of the animal looks rough.The animal will lost theappetite.SourcesVitamin A comes mainly from the animal sources , such as the fish meal,egg yolk,

6、milk,blood meal animal liver and so on.維生素及其在動(dòng)物營(yíng)養(yǎng)中的作用(英文版) Functions: 1.Promote the absorption of calcium and phosphorus. Vitamin D can promote the formation of calcium-bind proteinin enterocytes(腸細(xì)胞) and activate the transport system of cal-cium and phosphorus in intestinal epithelial(上皮的) cells.In

7、 addit-ion ,Vitamin D can help the renal tubular(腎小球) to reabsorb theCalcium and phosphate.2.VD is important for the growth of bones and teeth.The storage of calcium and phosphorus in bone can be controledby Vitamin D,which can improve the state of calcium and phosp-horus.維生素及其在動(dòng)物營(yíng)養(yǎng)中的作用(英文版) Deficie

8、ncy A lack of Vitamin D can lead to stop of bone calcification.As a result of that, rickets (佝僂病) will appear in young animals andosteomalacia(骨軟化癥) or osteoporosis(骨質(zhì)疏松癥) will appear inadult animals. Besides,the laying rate of poultry reduce. Sources In nature,Vitamin D exists in a variety of forms

9、.Such as D2,D3and D4.Among them,D2 and D3 are the most important foranimals.The Vitamin D2 mainly comes from plants while the Vitamin D3 mainly comes from animal sources. 維生素及其在動(dòng)物營(yíng)養(yǎng)中的作用(英文版) Functions: 1.It has the promotion of sex hormone secretion and the regula- tion of gonadal(性腺) development an

10、d function.It can improves the reproductive function.So it also called tocopherol.2.VE can leads to a termination of peroxidation process of body fat , stabilizes the unsaturated fatty acids and protects the inte- grity of biological membranes.3.VE is necessary for the structure & function of sk

11、eletal muscle(骨骼肌) ,cardiac muscle (心肌) ，and the smooth muscle.維生素及其在動(dòng)物營(yíng)養(yǎng)中的作用(英文版) Deficiency When it is lacking,the muscular dystrophy(營(yíng)養(yǎng)不良)(white muscledisease) occures first.In addition,it also has a serious influence on thereproductive function.Especially for the male animals,the sperm cellforma

12、tion blocked,the semen quality is poor,all these lead to infertility(不育).For female,the conception rate decline,the embryo(胚胎) is prone to death in the midway.SourcesAnimal source:only in colostrum(初乳)of cattle and humanPlant source:widely in nature,vegetable oil especially wheat germ oil. The most

13、of green feed is a good source.Typical deficienceCerebellarsoftening維生素及其在動(dòng)物營(yíng)養(yǎng)中的作用(英文版) Functions: Vk involved in the synthesis(合成)of prothrombin(凝血酶原)in liver and maintain the normal blood coagulation.Moreover,It can strengthen the detoxification(解毒能力) of liver and helpcontrol the blood pressure.Deficiency:Blood coagulation time is too lo