Effect Of Flaxseed On Production Performance And Fatty Acid Metabolism In Cows

Flaxseed is rich inα-linolenic acid in the special oil crops,Because flaxseed contains a high energy value so high in fat, flaxseed oil seeds and other major difference is that it contains high levels of linolenic acid flax. The test selected age,parity,lactation length and milk yield was similar to 100 mid-lactation cows were randomly divided into 2 groups,groups 50,the diets supplemented with flaxseed, On production performance of dairy cows, milk fatty acid composition and blood biochemical indicators and blood fatty acid composition, The results showed that:⑴Formal trial period of 70 days full of daily milk yield per head increased 1.67kg (P<0.05), the increase rate of 6.26%. Milk quality,milk fat,percentage,milk proteins,total dry matter and FFA were enhanced (p<0.05) 24.68%,12.38%,5.60% and 21.43%. Economic benefit is obvious.⑵To significantly improve the milk fatty acids (PUFA) composition was increased by 27.022% (P<0.01).Which increase the C18: 2, C18: 3, C20: 4, C20: 5 and C22: 6 fatty acids, the difference between the two groups was significant (P<0.01).Unsaturated fatty acids in the composition ofω-3 type (includingα-C18: 3,EPA and DHA) fatty acids andω-6 fatty acid (C18: 2,γ-C18: 3 and C20: 4) composed of two groups of were significant differences between (p<0.01) higher than the experimental group, the increase rate was 78.472% and 19.383%.Can significantly (p<0.01) lower milkω-6type /ω-3 type ratio, the lower rate of 33.108%.To reduce the saturated fatty acids (TSFA) component (P<0.05), reduce the rate of 3.146 percent, which decreased C10: 0,C12: 0,C14: 0,C16: 0 and C18: 0 fatty acids,C14: 0 fatty acid composition of two no significant difference between groups (P>0.05), C10: 0,C12: 0,and C16: 0 fatty acid composition significantly different between the two groups (P<0.05), C18: 0 fatty acids were significantly different between the two groups (P<0.01), while the increase in C8: 0 fatty acid composition significantly different (P<0.05). Also reduce the C16: 1 fatty acids was not significant (P>0.05).⑶To reduce serum GLU,NEFA,TG and CHO concentrations, but the experimental group and control group no significant difference between (P>0.05). Also increased the HDLc (P<0.05), reduce the concentration of LDLc(P<0.05) and VLDLc (P>0.05), while increasing the serum lipoprotein in HDLc (P<0.05), lower LDLc (P<0.05), VLDLc (P>0.05) and LDLc + VLDLc (P>0.05) component.To increase the serum proteins contained in the ApoA1 (P<0.05) concentration, so reducing ApoB (P>0.05) concentrations.⑷To improve the cow serum polyunsaturated fatty acids (PUFA) composition of 36.591% (P<0.05), increase in C18: 2,α-C18: 3,γ-C18: 3,C20: 4,C20: 5 and C22: 6 fatty acids composition, alsoα-C18: 3,γ-C18: 3,C20: 4,C20: 5 and C22: 6 fatty acid composition differences between the two groups were significantly (P<0.05), C18: 2 fatty acids was not significant (P>0.05). The lower saturated fatty acids (TSFA) composed of 6.079% (P<0.05), which reduce the C10: 0,C12: 0,C14: 0 and C16: 0 fatty acid composition between the two groups were not significantly different (P>0.05)。The increase in C8: 0 and C18: 0 fatty acid composition, but the C8: 0 significantly different (P<0.05), C18: 0 was not significant (P>0.05). (5)to increase serum Pr (p<0.05), INS (p<0.05), GH (P>0.05) and T3 (p>0.05) concentrations decreased T4 (P<0.05) concentrations.