China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (9): 2841-2848.doi: 10.16431/j.cnki.1671-7236.2020.09.017

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Addition of Rare Earth-chitosan Chelate to Diets at Different Protein Levels on Sows and Suckling Piglets

XIONG Yi1, ZHANG Bo1, SHEN Kang2, LEI Long1, SUN Hua3, ZHAO Shengjun1, REN Ying1,4   

  1. 1. Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China;
    2. College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China;
    3. Institute of Animal Husbandry and Veterinary, Hubei Academy of Agricultural Sciences, Wuhan 430064, China;
    4. Engineering Research Center of Feed Protein Resources on Agricultural By-products, Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, China
  • Received:2020-02-24 Online:2020-09-20 Published:2020-09-16

Abstract: The purpose of this experiment was to study the effects of corn-soybean meal diets with different levels of crude protein (CP) adding 200 g/t rare earth-chitosan chelate (RECC) on the reproductive performance of sows and growth performance of their offspring.A total of 60 sows at 90 days of gestation with good physical condition,parity and the expected date of birth were selected.Single-factor randomized block design was used,and sows were divided into 3 groups,20 sows in each group,1 sow each replicate.The level of diet CP and RECC were 17.55% CP,17.00% CP+200 g/t RECC and 16.00% CP+200 g/t RECC in control group,test group Ⅰ and test group Ⅱ,respectively.The test was started from the 90th day of gestation of the sow and ended at the time of weaning at 21 days.The sow litter performance and growth performance of offspring suckling piglets were studied.The final results showed that:Compared with the control group,sow's duration of the test groups Ⅰ and Ⅱ were significantly shortened (P<0.05),but the total litter size and number of born alive did not show significant difference (P>0.05).Postpartum weight loss of sows of the test group Ⅱ was significantly improved (P<0.05),but there was no significant difference in the interval from weaning to estrus (P=0.30).In addition,compared with the control group,sow's ADFI of test group Ⅰ and Ⅱ had an increasing tendency during lactation (P=0.08),and there was no significant difference in ADG,the weight of newborn and weaned piglets (P>0.05),but the diarrhea rate of suckling piglets was significantly reduced (P<0.05).In summary,under the conditions of this trial,when the CP level in the diet was 16.00% and with the addition of 200 g/t RECC,it could improve the reproductive performance of sows,shorten the sow's duration,and reduce the diarrhea rate of suckling piglets.It was of great significance to the improvement of the reproductive performance of sows.

Key words: rare earth-chitosan chelate; perinatal sow; reproductive performance

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