Effects of Pasting Anionic Salt and RPC on Production Performance and Blood Biochemical Indexes of Perinatal Dairy Cows |
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| Authors: | KONG Ping CHEN Hong-li WANG Shu-jie XU Na WU Yan-yan GAO Wei |
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| Affiliation: | 1. College of Animal Science & Technology, Shihezi University, Shihezi 832000, China;2. Shihezi Western Animal Husbandry Company, Shihezi 832000, China |
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| Abstract: | This experiment was conducted to study the effects of pasting anionic salt and RPC on production performance and blood biochemical indexes of perinatal dairy cows.Using randomized trial design, 20 healthy Holstein cows which according to the tire time (2 to 4), age, last time lactation quantity and parturition date were chosen.They were divided into four groups, 5 cows per group.The control group was fed TMR diet, Ⅰ, Ⅱ, Ⅲ groups were fed the basal diet +200 g pasting anion salt and supplemented with 10, 20, 30 g/(head·d) RPC, respectively.There were 7 days to pilot test, formal test was from antenatal 21 d to parturition.The results showed that:①DMI of all experimental groups were significantly higher than that of control group during most of antenatal 21 days (P< 0.05);The nutrients apparent digestibility of all experimental groups were generally higher than that of control group;Add 20, 30 g/(head·d) RPC was significantly increased the apparent digestibility of CP, NDF, ADF (P< 0.05);The apparent digestibility of Ca of all experimental groups were significantly higher than that of control group (P< 0.05);Add 30 g/(head·d) RPC was significantly increased the apparent digestibility of EE (P< 0.05).②Among postpartal 90 days, the total milk yield of all experimental groups were significantly or extremely significantly higher than that of control group (P< 0.05;P< 0.01);Add 20, 30 g/(head·d) RPC was significantly enhanced the feed conversion rate (P< 0.05);Add 30 g/(head·d) RPC was improved the percentage of milk dry matter, milk protein and milk fat of colostrum (P< 0.05).③Serum Ca2+ concentration of all experimental groups were significantly higher than that of control group (P< 0.05);Add 20, 30 g/(head·d) RPC was significantly increased the part time plasma TG levels (P< 0.05), significantly reduced the part time plasma contents of TCHO, BHBA and NEFA (P< 0.05).In conclusion, among the perinatal period added pasting anionic salt and RPC could improve early prenatal DMI and part nutrients apparent digestibility, improve perinatal blood calcium and blood lipid metabolism, and enhance the production performance and feed conversion rate, based on adding 200 g pasting anion salt among early perinatal, the best add amount of RPC was 30 g/(head·d). |
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| Keywords: | perinatal dairy cows pasting anion salt RPC production performance blood biochemical indexes |
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