Effects of Feeding Coated Calcium Chloride before Farrowing on Duration of Farrowing and Stillbirth of Sows

WANG Liu; YANG Zhipeng; WANG Miaomiao; PENG Jian; TAN Jiajian; SUN Haiqing; WEI Hongkui

doi:10.3969/j.issn.1006-267x.2022.01.013

Chinese Journal of Animal Nutrition >

2022 , Vol. 34 >Issue 1: 123 - 130

DOI: https://doi.org/10.3969/j.issn.1006-267x.2022.01.013

RESEARCH PAPER

Effects of Feeding Coated Calcium Chloride before Farrowing on Duration of Farrowing and Stillbirth of Sows

WANG Liu ,
YANG Zhipeng ,
WANG Miaomiao ,
PENG Jian ,
TAN Jiajian ,
SUN Haiqing ,
WEI Hongkui

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1. College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China;
2. Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China;
3. Guangxi Yangxiang Joint Stock Co., Ltd., Guigang 537000, China

Received date: 2021-07-17

Online published: 2022-01-18

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Abstract

This study was designed to investigate the effects of feeding coated calcium chloride before farrowing on duration of farrowing and stillbirth of sows. A total of 913 Danish Landrace×Yorkshire and Yorkshire×Landrace crossbred pregnant sows at 109 days of gestation were divided into 3 groups according to the principle of similar body condition and fetal parity. Sows in the control group were fed a basal diet every day from day 109 of gestation to the day of farrowing, and those in the experimental groups Ⅰ and Ⅱ were fed the basal diet supplemented with 25 and 50 g/d coated calcium chloride, respectively. The feeding trail was conducted from day 109 of gestation to the day of farrowing. During the experiment, fecal score was conducted every day. On the day of farrowing, the duration of farrowing, number born and stillbirth number of the experimental sows were recorded. Urine and blood were collected for the determination of urine pH and serum calcium ion concentration respectively. The results showed as follows:l) there was not a significant interaction effect between feeding coated calcium chloride before farrowing and number born on stillbirth number of sows (P>0.05). The stillbirth numbers in the experimental groups Ⅰ and Ⅱ were 0.31 and 0.28, respectively, which were significantly less than that of 0.44 in the control group (P<0.05), but there was no significant difference between experimental groups Ⅰ and Ⅱ (P>0.05). 2) The duration of farrowing of sows in the experimental group Ⅰ was significantly shorter than that in the control group (P<0.05), while the duration of farrowing in experimental group Ⅱ was not significantly different from that in the control group (P>0.05). There was no significant difference in the placenta expulsion time among the three groups (P>0.05). 3) There was no significant difference in urine pH of sows among the three groups on day 109 of gestation and the day of farrowing (P>0.05). There was no significant difference in urine pH between the control group and the experimental group Ⅰ from day 110 to day 113 of gestation, while the urine pH in the experimental group Ⅱ was significantly lower than that in the control group and the experimental group Ⅰ (P<0.05). Compared with the control group, the serum calcium ion concentration of sows in the experimental groups was significantly increased (P<0.05), and the feces score on day 112 of gestation and the day of farrowing was significantly decreased (P<0.05). There was no significant difference in the constipation rate of sows among the three groups (P>0.05). In conclusion, feeding coated calcium chloride with 25 g/d on day 109 of gestation to farrowing for sows can significantly decrease the duration of farrowing and reduce the stillbirth, moreover the effect is not affected by the number born in total of sows, and the regulation effect may be related to the increase of blood calcium ion concentration.

Key words： stillbirth; duration of farrowing; coated calcium chloride; number born in total

Cite this article

WANG Liu , YANG Zhipeng , WANG Miaomiao , PENG Jian , TAN Jiajian , SUN Haiqing , WEI Hongkui . Effects of Feeding Coated Calcium Chloride before Farrowing on Duration of Farrowing and Stillbirth of Sows[J]. Chinese Journal of Animal Nutrition, 2022 , 34(1) : 123 -130 . DOI: 10.3969/j.issn.1006-267x.2022.01.013

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