Investigation and analysis of hypocalcemia,production performance,diseases,and culling of dairy cows in large-scale dairy farms
10.16303/j.cnki.1005-4545.2025.11.26
- VernacularTitle:我国部分规模化牧场奶牛低钙血症、生产性能、疾病和淘汰的调查分析
- Author:
Jipeng TANG
1
;
Shengyu HAN
;
Xiaochen JIA
;
Guang SHAO
;
Chuang XU
;
Cheng XIA
Author Information
1. 黑龙江八一农垦大学动物科技学院,黑龙江大庆 163319
- Publication Type:Journal Article
- Keywords:
hypocalcemia in dairy cows;
lactation;
reproduction;
culling;
disease
- From:
Chinese Journal of Veterinary Science
2025;45(11):2507-2517
- CountryChina
- Language:Chinese
-
Abstract:
The purpose of this survey was to understand the occurrence of hypocalcemia in dairy cows in large-scale pasture and its relationship with production performance,disease and culling.Eighty-one large-scale pastures were selected in China to carry out a questionnaire survey on the lactation performance,reproductive performance,disease status and culling situations of dairy cows,and analyzed the production data of dairy farms by SPSS software.The survey results show that the incidence of hypocalcemia in dairy cows in pasture was different,the subclinical type was nearly twice as high as the clinical type,and the incidence rate of hypocalcemia was higher in about 30％of pasture.Hypocalcemia has no obvious effect on the lactation performance of dairy cows on dairy farms.However,a high incidence rate can reduce the conception rate,increase the incidence of subclinical mastitis,ketosis,and other common internal diseases,and raise the annual culling rate and culling rate of adult cows.Clinical,subclinical and total incidence of hypocalcemia have differ-ent effects on reproduction and diseases such as mastitis and ketosis,but clinical hypocalcemia is more harmful.Hypocalcemia is still an important metabolic disease that harms the health and pro-duction of dairy cows in large-scale pastures in China.For farms with a high incidence rate,it is recommended to conduct regular monitoring of blood calcium levels in dairy cows before and after calving,and to conduct in-depth investigations into the related pathogenic factors.This will provide a scientific basis for improving the prevention measures for hypocalcemia,reducing the incidence of the disease,increasing reproductive efficiency,and reducing culling rates.
