Effects of dietary types on feces and urine pollution production characteristics of Inner Mongolia white cashmere goats
The purpose of this experiment was to investigate the effects of different dietary types on feces and urine production,organic matter,chemical oxygen demand(COD),nitrogen,phosphorus,copper and zinc content and production in feces and urine of Inner Mongolia white cashmere goats.Twenty-four Inner Mongolia white cashmere goats of eight months old with similar weight were randomly divided into four groups:Alfalfa green hay group(G1),alfalfa green hay supplemental concentrate group(G2),corn straw group(G3),and corn straw supplemental concentrate group(G4)(the supplemental feeding amount of each goat was 200 g,the ratio of concentrate to coarse was 2.5∶7.5,other feeding conditions are the same),with six replicates per group,and one sheep per replicate.The pre-test period was 10 days,and the formal test period was 30 days.The results showed that the amount of fresh feces in the G2 group and G4 group were significantly higher than those in the G1 group and G3 group(P＜0.05),and the mass of dry feces was extremely higher than that in the G1 group(P＜0.01).Cu content in feces of the G1 group and G2 group was extremely higher than that of the G3 group and G4 group(P＜0.01).The emissions of organic matter and zinc in feces of the G2 group and G4 group were significantly higher than those of the G1 group and G3 group(P＜0.05),and the emissions of phosphorus were significantly higher than those of the G3 group(P＜0.05).The fecal copper emission of the G2 group was extremely higher than that of other groups(P＜0.01),and that of the G1 group and G4 group was extremely higher than that of the G3 group(P＜0.01).Nitrogen content and emission in urine of the G2 group were extremely higher than those of other groups(P＜0.01),while the phosphorus content and emission in urine of the G1 group and G3 group were significantly higher than those of the G1 group and G3 group(P＜0.05).The study indicates that the feed formula suitable for Inner Mongolia white cashmere goats can be adjusted according to the amount of feces and urine produced by various diets and the excretion law of pollutants in feces and urine,which can not only meet the production needs of animals,but also reduce the excretion of pollutants.
type of dietfecal and urinary characteristicsInner Mongolia white cashmere goatsfecal productionurine production
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