[ Objective ] To study the influence of sows farrowing performance on the growth of 21-day-old weaned piglets and their correlation. [ Methods ] A total of 1 350 Duroc x Landrace Yorkshire piglets produced by 2-6 fet...[ Objective ] To study the influence of sows farrowing performance on the growth of 21-day-old weaned piglets and their correlation. [ Methods ] A total of 1 350 Duroc x Landrace Yorkshire piglets produced by 2-6 fetal Landrace x Yorkshire sows from 118 litters within a month were selected to be the test objects. All the newborn piglets were lactated by their parent sows. The test groups were divided according to different numbers （6 - 17） of live birth. The variance analysis were conducted on birth weight, litter weight at birth, number of 21-day-old weaning piglets, weaning weight, weaninl2g weight of litter, weaning survival rate and relative individual weight gain among different weeks. [ Results] Sows farrowing performance had significant influence on the growth performance of 21- day-old piglets. However, the influences among different traits varied, some were even on the contrary. With the increase of the number of live birth, the birth weight, weaning weight of litter and weaning survival rate showed a decline trend. And when the number of live birth was equal or more than 14, the weaning sur- vival rate dropped to below 90% （P 〈 0.01 ） ; when the number of live birth was 13, the litter weight at birth and weaning weight of litter reached the peak. What- ever the number of live birth increased or decreased, the weaning weight showed a regular decline trend. [ Conclusions] When the number of live birth changed from 11 to 13, the maximum values of the economic indicator （weaning weight of litter） and the technical specifications （weaning survival rate） were achieved.展开更多
文摘[ Objective ] To study the influence of sows farrowing performance on the growth of 21-day-old weaned piglets and their correlation. [ Methods ] A total of 1 350 Duroc x Landrace Yorkshire piglets produced by 2-6 fetal Landrace x Yorkshire sows from 118 litters within a month were selected to be the test objects. All the newborn piglets were lactated by their parent sows. The test groups were divided according to different numbers （6 - 17） of live birth. The variance analysis were conducted on birth weight, litter weight at birth, number of 21-day-old weaning piglets, weaning weight, weaninl2g weight of litter, weaning survival rate and relative individual weight gain among different weeks. [ Results] Sows farrowing performance had significant influence on the growth performance of 21- day-old piglets. However, the influences among different traits varied, some were even on the contrary. With the increase of the number of live birth, the birth weight, weaning weight of litter and weaning survival rate showed a decline trend. And when the number of live birth was equal or more than 14, the weaning sur- vival rate dropped to below 90% （P 〈 0.01 ） ; when the number of live birth was 13, the litter weight at birth and weaning weight of litter reached the peak. What- ever the number of live birth increased or decreased, the weaning weight showed a regular decline trend. [ Conclusions] When the number of live birth changed from 11 to 13, the maximum values of the economic indicator （weaning weight of litter） and the technical specifications （weaning survival rate） were achieved.
文摘目的探讨社会支持及家庭亲密度和适应性对支气管哮喘患儿照顾者抑郁情绪的影响。方法选取并调查2021年1月~2023年1月在我院收治的84例支气管哮喘患儿的照顾者,依据抑郁自评量表(Self-rating depression Scale,SDS)评估照顾者抑郁程度,将SDS评分<53分的照顾者归为单纯患儿照顾者组(n=50),SDS评分≥53分的照顾者归为患儿照顾者合并抑郁组(n=34)。对比两组社会支持评定量表(Social Support Rating Scale,SSRS)评分、家庭亲密度和适应性量表(Family Adaptability and Cohesion Scale,FACESⅡ)评分,通过Pearson分析哮喘患儿照顾者抑郁与社会支持、家庭亲密度和适应性的相关性。结果患儿照顾者合并抑郁组主观支持、客观支持及对支持的利用度得分显著低于单纯患儿照顾者组(P<0.05);患儿照顾者合并抑郁组实际亲密度、理想亲密度、实际适应性及理想适应性评分显著低于单纯患儿照顾者组,而亲密度不满意度评分显著高于单纯患儿照顾者组(P<0.05);抑郁得分与亲密度不满意度因子得分呈正相关,与社会支持、实际亲密度、理想亲密度、实际适应性及理想适应性因子得分呈负相关(P<0.05)。结论支气管哮喘患儿照顾者抑郁情绪与家庭亲密度和适应性与社会支持存在明显相关性,患儿照顾者抑郁情绪越严重,其社会支持越差,亲密度和适应性越低。
