Effects Of Inorganic Sulfur Dietary On Nutrient Digestion And Metabolism, Blood Indicators And Cashmere Production Performance In Liaoning Cashmere Goats

In order to explore the effects of dietary inorganic sulfur on digestion and metabolism in Liaoning cashmere goats, a 4x4 Latin-square experiment design was chosen, four 1-year-old castrated Liaoning cashmere goats installed permanent ruminal cannulas, were used to study the effects of dietary inorganic sulfur (sodium sulfate, zinc sulfate of the hydration, manganous sulfate of the hydration) on nutrient digestion and metabolism in Liaoning cashmere goats. To study the effects of dietary supplementation of inorganic sulfur towards blood biochemical indicators and cashmere production performance,28 healthy 4-month-old Liaoning Cashmere goat ewes with similar cashmere yield in the last year were chosen in the feeding experiment, which were divided into two groups at randomly, and to discuss the effects of sulfur on improvement of cashmere production for forward step.The results showed that:①There were no significant differences on metabolism of nitrogen within each dietary (P>0.05); S intake was significantly increased of dietary inorganic sulfur (P<0.05), but no significant differences on urinary S and S apparent digestibility (P>0.05);②There were no significant differences in rumen pH and NH3-N concentration in rumen among four dietaries.③Dietary supplementation of inorganic sulfur could significantly improve utilization rate of feed protein through the method of stimulating the anabolism of amino acid, protein and decreasing the content of blood urea nitrogen; There were no significant differences on content of blood plasma MLT and PRL between two groups (P>0.05), blood plasma FSH and LH of zinc diet group were significantly higher than control group (P<0.05), cashmere growth was promoted by the supplementation of inorganic sulfur through the method of improving the level of blood plasma FSH and LH; Zinc diet could significantly increase the content of blood plasma SAA;④Cashmere growth rate was significantly increased by the supplementation of inorganic sulfur; Content of cashmere amino acid and sulfur were significantly increased by the supplementation of inorganic sulfur which indicated that zinc diet could increase SAA utilization rate and cashmere quality efficiently.⑤Generally, the optimum inorganic sulfur source should be dietary ZnSO4.