妊娠后期营养水平对初产母猪繁殖性能及血液生化指标的影响

doi:10.16431/j.cnki.1671-7236.2018.08.018

Abstract

Abstract:

To study the effects of nutrient level during late pregnancy on the body condition, reproductive performance and blood biochemical indexes of primariparous sows,36 sows with similar weight and backfat thickness were chosen and randomly divided into 3 groups (groups Ⅰ,Ⅱ and Ⅲ) according to the body condition and breeding time with 6 replicates per group and 2 sows per replicate.The pregnant sows in groups Ⅰ,Ⅱ and Ⅲ were fed the diets with 1.5, 2.0 and 2.5 times as much as maintenance requirement.The test began at 81 d after pregnancy,and end with the parturition,which last for 33 d.The results showed that the backfat thickness of sows in group Ⅰ was significantly lower than that in group Ⅲ (P<0.05).There was no significant difference in backfat thickness between all groups at weaning (P>0.05).The loss of backfat of lactating sows in group Ⅰ during the lactation period was significantly lower than that in group Ⅲ (P<0.05).The body weight after delivery and body weight before delivery in group Ⅲ were significantly higher than that in group Ⅰ (P<0.05).There was no significant difference of body weight at 81 days after pregnancy and body weight loss during lactation among all groups (P>0.05).There were no significant difference of litter size,number of piglets born alive per litter,average body weight at weaning and weaning-oestrus interval among all groups (P>0.05).The average birth weight,average litter weight at weaning and litter weight gain during lactation of group Ⅲ were significantly higher than those in group Ⅰ (P<0.05).The level of estrogen in the groups Ⅱ and Ⅲ was significantly higher than that of group Ⅰ (P<0.05),and there was no significant difference of prolactin and progesterone levels among all groups (P>0.05).The triglyceride level in group Ⅰ was significantly lower than that in groups Ⅱ and Ⅲ (P<0.05).The content of urea nitrogen and glucose in each test group increased in turn with the increase of nutrient level and the difference was significant (P<0.05).The content of insulin in group Ⅲ was significantly higher than that in group Ⅰ (P<0.05).The total protein content of each group was not significant different (P>0.05).The results showed that the feeding level of sows was 2.0 times as much as maintenance requirement in the later stage of pregnancy could make the body condition reach the standard level,while the nutritional level was 2.5 times as much as maintenance requirement could raise the performance of the sows farrowing.

Key words: nutrient levels; primiparous sow; body condition; reproductive performance; reproductive hormones

CLC Number:

S828

CHEN Ling, HUANG Dapeng, WEI Guosheng. Effects of Nutrient Level During Late Pregnancy on Reproductive Performance and Blood Biochemical Indexes of Primiparous Sows[J]. , 2018, 45(8): 2190-2196.

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Effects of Nutrient Level During Late Pregnancy on Reproductive Performance and Blood Biochemical Indexes of Primiparous Sows

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