The Effects Of The Semen Vaccariae Extractive On Production Perofrmance And Blood Index In Middle Laction Dairy Cows

Objective of this study is to explore the effect of Semen Vaccariae extractfeed additive on cows blood biochemical indicators and humoral immune indicators,serum hormone indicators, milk yield, relevant indicators of milk composition usingSemen Vaccariae extract as the dominant through the cows feeding trials. The purposeis to provide the theory and application foundation for the future deep-processing andlarge-scale promotion application of Semen Vaccariae resources.ExperimentⅠ Effects of Semen Vaccariae extract on milk yield and milkcomposition of Middle lactation dairy cowsThis study selected32head of Chinese holstein cows which were in lactationmedium-term (100~130d) of2~4parity, good condition, and the same or similarmilk yield and weight. According to the drug dosage, the32head of cows weredivided into4groups randomly: the first group (as control group, add0g/d·head), thesecond group (as the low dose group,5.7g/d·head), the third group (as the middledose group,19g/d·head), the fourth group (for high dose group,38g/d· head),feeding cows for30d. The results showed that:1、Compared with the control group, there was different degrees of increase inmilk yield for each experimental group. Compared with the control group,there was arising trend on in milk yield of the experimental group with low,But the differenceswere not significant (P>0.05); The milk yield of the experimental group with lowdose increased by3.53%（p＞0.05），5.08%（p＞0.05）respectively at22d,30d；The milk yield of the experimental group with middle dose increased by8.44%（p﹤0.05）、13.95%（p﹤0.01）respectively at22d,30d; The milk yield of the experimentalgroup with high dose increased by7.14%（p﹤0.05）、11.30%（p﹤0.05）respectivelyat22d,30d.2、Compared with the control group, as the test time going, the lactose content ofeach group increased without significant difference (p﹥0.05). The lactose content ofthe experimental group with low dose group increased by0.6%and2.7%respectivelyat22d,30d; The lactose content of the experimental group with middle dose grouplactose content increased by1.9%and0.6%respectively at22d,30d; The lactosecontent of the experimental group with high dose increased by1.7%and1.3%respectively at22d,30d. Compared with the control group, the difference of themilk protein, milk fat rate,urea nitrogen, total solid content and somatic cell count inthe experimental group was not significant (p﹥0.05). ExperimentⅡEffects of Semen Vaccariae extract on cows blood biochemicalindicatorsMaterials and methodsⅠwith experiment，the results showed that:1、Compared with the control group, there was no change in the total protein andalbumin content levels in each dosage group at30d.; Compared with the controlgroup, the trend of the blood glucose levels in each dosage group was rising at30d.But the differences was not significant (P>0.05);Compared with the control group,the trend of triglyceride, cholesterol and urea nitrogen levels in each dosage groupwas decline at30d, but without significant difference (p>0.05);This suggested thatthe effect of cow blood biochemical indicators for cowherb seed extract was nosignificant (p>0.05).2、Compared with the control group, at30d, there was an elevated trend on PRLlevels in low dosage group without significant difference (p>0.05). The PRL levelsin middle dosage group improved highly significantly (p﹤0.01) and the PRL levels inhigh dose group was significantly increased (p﹤0.05); Compared with the controlgroup, at30d, there was an elevated trend on GH levels in low dosage group withoutsignificant difference (p>0.05). The GH levels in middle dosage group improvedhighly significantly (p﹤0.01) and the GH levels in high dose group was significantlyincreased (p﹤0.05).ExperimentⅢ Effects of Semen Vaccariae extract on cows immune functionMaterials and methodsⅠwith experiment，the results showed that:Compared with the control group, there was a rising trend on IgA level in eachdosage group. But the differences were not significant (p>0.05); Compared with thecontrol group, no significant changes were seen on IgG, IgM level（p﹥0.05）.From the study results of this topic, the Semen Vaccariae extract has the functionof improving cow production performance and slowing down the descent rate of thecows milk production in middle lactation.