Factores ambientales asociados con los días no-productivos de cerdas en el trópico mexicano

IF 0.3 4区农林科学 Q4 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Revista Mvz Cordoba Pub Date : 2019-12-19 DOI:10.21897/rmvz.1615

Jesús Enrique EK MEX, Erika Abigail Reyes González, Alejandro Alzina López, J. C. Segura Correa

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引用次数: 2

Abstract

Objectives. To estimate the lifetime non-productive days (NPD), lifetime proportion of NPD (%NPD) and non-productive days per sow per year (NPD/Y), and to determine the effect of herd and sow level factors on the traits here studied in three pig farms in the Mexican tropics. Materials and methods. Data from 6703 sows from three commercial farms were used. The model that described the traits studied comprise the fixed effects of farm, year and season of first farrowing, age at first parity, reasons of removal of sows, year x season interaction and the residual error. Results. The means for lifetime NPD, %NPD and NPD/Y were 64 days, 12.0% and 39.3 days, respectively. All fixed factors had significant effects (p<0.01) on the characteristics evaluated. Sows having their first parity at an old age and sows culled because of reproductive reasons had the highest lifetime NPD. In addition, sows culled at first parity had lower lifetime NPD and higher %NPD than sows culled in subsequent farrowing. Conclusions. The early culling of sows increased the percentage of non-productive days, which in turn is expected to reduce the profit of farms.

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墨西哥热带地区与母猪非生产日有关的环境因素

目标。估计墨西哥热带地区三个养猪场的寿命无生产天数（NPD）、NPD的寿命比例（%NPD）和每头母猪每年的无生产日数（NPD/Y），并确定群体和母猪水平因素对本研究性状的影响。材料和方法。使用了来自三个商业农场的6703头母猪的数据。描述所研究性状的模型包括农场、第一次产仔的年份和季节、第一次产仔时的年龄、母猪出栏的原因、年份与季节的相互作用和残差的固定影响。后果平均寿命NPD、%NPD和NPD/Y分别为64天、12.0%和39.3天。所有固定因素对评估的特征都有显著影响（p<0.01）。在年老时第一次产下的母猪和因繁殖原因而被扑杀的母猪一生的NPD最高。此外，在第一次产下时扑杀的母猪比在随后的产仔中扑杀的仔猪具有更低的寿命NPD和更高的%NPD。结论。早期扑杀母猪增加了非生产日的百分比，预计这反过来会降低农场的利润。

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来源期刊

Revista Mvz Cordoba 农林科学-奶制品与动物科学

CiteScore

0.70

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal MVZ Córdoba is an open access international scientific journal financed and edited by the University of Córdoba (Colombia). The journal publishes quarterly, continuously in PDF, XML, Epub, original articles, literature reviews, brief communications and clinical cases, peer-reviewed (double-blind) in Spanish and English, which are related to the agricultural and veterinary sciences. The journal is directed to natural and legal persons of veterinary medicine, animal husbandry, public health, epidemiology, aquaculture, biology, basic biomedical sciences and biotechnology and constitutes a space for academic and scientific discussion around the work of professionals in Veterinary Medicine and Zootechnics. Four-monthly publication. "The Journal MVZ Córdoba supports the policies for registration of clinical trials of the World Health Organization (WHO) and the International Committee of Medical Journal Editors (ICMJE), since it recognizes the importance of these initiatives for international registration and dissemination. of information about clinical studies, in open access. As a result, since 2007, the journal MVZ Córdoba only publishes clinical research articles that have received an identification number in one of the Clinical Trial Registries validated by the criteria established by WHO and ICMJE, whose addresses are available in the ICMJE website. The identification number is recorded at the end of the summary. "