Supplementary material: Doppler ultrasound, blood flow, portal vein, milk vein, body condition, dairy cows

This dataset contains supplemental material to the research article: "Colour Doppler study of blood flow in the portal vein in relation to blood flow in the milk vein, milk yield and body condition of dairy cows during dry period and lactation".

Dataset contents explained:

1. Portal Vein Blood FLow (.avi) - video of color Doppler examination of blood flow in the portal vein of dairy cows

2. Table 3 (.pdf) - Descriptive statistics of milk vein blood flow volume (MV_BFVol), body condition score (BCS), backfat thickness (BFT) and heart girth (HG) circumference of the dairy cows included in the study, stratified by production stage (late lactation, dry period, early lactation).

3. Tables 4, 5, 6 (.pdf): Ingredients, chemical composition and nutritive value of the total mixed rations provided for the: High Lactation, Low Lactation, and Close-Up (dry period) groups.

4. Fig. 6 (.tiff) - Cross Sectional Area (CSA) of the portal vein: Changes throughout the study period: starting from 7 days before the dry period (“DP”), throughout the DP, 7 and 3 days prior to calving, at calving (“C”) and from the 3rd to the 90th day in the new lactation (“DIM”: days in milk).

5. Fig. 7 (.tiff) - Diameter of the Portal Vein: Changes throughout the study period: starting from 7 days before the dry period (“DP”), throughout the DP, 7 and 3 days prior to calving, at calving (“C”) and from the 3rd to the 90th day in the new lactation (“DIM”: days in milk).

6. Fig. 8 (.tiff) - Distance of the Portal Vein from skin surface: Changes throughout the study period: starting from 7 days before the dry period (“DP”), throughout the DP, 7 and 3 days prior to calving, at calving (“C”) and from the 3rd to the 90th day in the new lactation (“DIM”: days in milk).

7. BFT example (.bmp) - B-mode ultrasound measurement of backfat thickness of a dairy cow (according to Schroeder and Staufenbiel, 2006)

8. Power Analyses (a-priori and post-hoc) (.pdf)

本数据集为研究论文《干奶期与泌乳期奶牛门静脉血流与乳静脉血流、产奶量及体况的彩色多普勒研究》的补充材料。

数据集内容说明如下：
1. 门静脉血流视频（Portal Vein Blood Flow，.avi格式）：奶牛门静脉血流彩色多普勒检查视频
2. 表3（.pdf格式）：本研究纳入奶牛的乳静脉血流量（MV_BFVol）、体况评分（BCS）、背膘厚度（BFT）及胸围（HG）的描述性统计结果，按生产阶段（泌乳晚期、干奶期、泌乳早期）分层展示
3. 表4、5、6（.pdf格式）：分别对应高泌乳组、低泌乳组以及围产期（干奶期）奶牛所食用的全混合日粮的原料组成、化学成分与营养价值
4. 图6（.tiff格式）：门静脉横截面积（Cross Sectional Area, CSA）随研究周期的变化情况：监测节点包括干奶期前7天（"DP"）、整个干奶期、产犊前7天与3天、产犊当日（"C"），以及新泌乳期第3天至第90天（"DIM：泌乳天数"）
5. 图7（.tiff格式）：门静脉内径随研究周期的变化情况：监测节点包括干奶期前7天（"DP"）、整个干奶期、产犊前7天与3天、产犊当日（"C"），以及新泌乳期第3天至第90天（"DIM：泌乳天数"）
6. 图8（.tiff格式）：门静脉距皮肤表面的距离随研究周期的变化情况：监测节点包括干奶期前7天（"DP"）、整个干奶期、产犊前7天与3天、产犊当日（"C"），以及新泌乳期第3天至第90天（"DIM：泌乳天数"）
7. 背膘厚度示例图（BFT example，.bmp格式）：奶牛背膘厚度的B型超声测量图像（依据Schroeder与Staufenbiel, 2006的方法）
8. 功效分析（含事前功效分析与事后功效分析）（.pdf格式）