| Some researches indicate that dairy cow physiological function may be affected by heat stress, which result in milk production decreasing in a large scale. There are too many days with high temperature and humidity in summer in the regions such as Chonging. The influence of heat stress on dairy cow is especially severe. Trying all possible ways to prevent heatstroke, to cool down and to cure dairy cow heat stress effectively becomes the key technique of keeping high milk production. Chinese herbal medicine has the advantage of wide sources, low cost, reliable and lasting effect, low side effect, and usage convenience. Of many methods preventing and curing heat stress, Chinese herbal medicine has its unique superiority. Chinese medicine polypharmacon Re Chuan Ping, which is selected from several prescriptions through many clinical tests, is a polypharmacon with better effect on preventing and curing heat stress. In this research, 20 Chinese Holstein cows are chosen as research objects, and through measuring and analyzing two group dairy cows' productivity, physiological indexes and blood biochemical indexes as well as the blood biochemical indexes of the laboratory animals fed under artificial climate condition, we study the effect of Chinese medicine polypharmacon Re Chuan Ping on cow inner milieu and its mechanism of curing heat stress. The main methods and results are as following:1. Heat stress results in rectum temperature increasing 0.34℃ on average (P<0.05), makes respiration frequency increase 31.97 times per minute (P<0.05) and makes heart rate increase about 5.94 times per minute (P<0.05). Applying Chinese herbal medicine polypharmacon Re Chuan Ping can make rectum temperature reduce to a lower level which has no significant difference with heat stress state (P>0.05), make respiration frequency decrease 14.67 times per minute, which differs significantly from control group (P<0.05) and make dairy cow heart rate decrease 4.55 times per minute, which have no significant difference compared with heat stress state (P>0.05).2.Dairy cow being affected by heat stress in control group, daily milk production reduce 3.54Kgon average (P<0.05) and decrease notably; and milk specific gravity decrease 0.0041 notably (P<0.01). While in group taking medicine, daily milk production reduce 2.03 Kg on average (P>0.05), which is un-notable, and milk specific gravity decrease 0.0027 (P<0.01), which is very notable. In the group taking medicine, daily milk production may increase 1.51 Kg each dairy cow and milk specific gravity increase 0.0014, which has significant difference compared with control group (P<0.01).3. In control group under heat stress, [K+] in dairy cow serum increases 1.3 mmol/L (P<0.05), [Na+] raises 5.17 mmol/L (P>0.05), [Cl-] raises 2.54 mmol/L (P<0.05), plasma CO2CP increase 1.79mmol/L compared with non-heat stress state, and serum pH decreases 0.143 (P<0.01). In curinggroup applying Re Chuan Ping, [K+] in serum raises 0.92 mmol/L (P<0.05) comparatively, [Na+] increases 0.54 mmol/L (P>0.05), [CY] raises 2.78 mmol/L (PO.05), plasma CO2CP only increases 0.23mmol/L and serum pH only decreases 0.002 (P>0.05). Applying medicine to cure dairy cow heat stress makes [K+] in dairy cow serum increase 0.38mmol/L (P>0.05) , makes [Na-] raise 5.71mmol/L (P>0.05), makes [Cl-] increase 0.24mmol/L, makes plasma CO2CP decrease 1.56 mmol/L, and makes serum pH increase 0.141, which has no significant difference compared with heat stress prophase (P>0.05).4.Dairy cow affected by heat stress in control group, TP in serum reduce 8.48 g/L (P<0.01), ALB lessen 1.89 g/L (P>0.05), G decrease 6.81 g/L (P<0.01), and IgG increase 0.11 g/L (P>0.05). In test group, cow serum TP decrease 6.72 g/L (P>0.05), but it has no significance with control group (P<0.05), ALB decrease 2.07 g/L (P>0.05), G decrease 4.46 g/L (P>0.05), and IgG increase 0.24 g/L (P<0.05). Applying medicine to cure heat stress dairy cow makes TP in serum increase 1.76 g/L, makes G increase 2.35 g/L and makes IgG increase 0.13g/L.5.In control g...
|
PDF Full Text Request