The study aims to investigate the effects of brackish water as the only water source for growing heifers of two milk breeds, Swedish Red and Holstein.
Brackish water for growing heifers
Objectives
The study aims to investigate the effects of brackish water as the only water source for growing heifers of two milk breeds, Swedish Red and Holstein.
Background
Due to the periodic droughts and water scarcity in some areas of Sweden, with high dairy and beef production, there is a need to explore alternative water resources for cattle. Preliminary findings from our previous research indicate that high-producing dairy cows can tolerate brackish water with a salinity of 8 g/L without any adverse effects on their health and productivity. This salinity level is comparable to that of the Baltic Sea around the islands of Öland and Gotland, which are the most affected by the droughts. In this study, we aim to investigate the effects of brackish water as the only water source on growing heifers of two breeds (SRB and SLB).
Project description
In this study, we will investigate the effects of brackish water on the health, growth, and reproduction parameters of dairy heifers and the potential differences between the two breeds. We will have two groups (control and treatment) where the treatment group will receive brackish water as their only water source, with a salinity of 8 g/L. We will collect samples (faeces, urine, and blood), and at the same time, we will be doing a behavioral observation. In this project, a daily watering routine is required, involving mixing water with feed salt to the corresponding salinity, providing the water to the animals, and conducting daily water analysis with an osmometer.
Specifications
We are looking for a master's student who is meticulous, and can work both independently and in a group. Previous experience with dairy cows and/or work in the lab is meritorious but not a requirement.
If you are interested in the project, please contact the doctoral student, Lea Managos (lea.managos@slu.se), or the project PI, Anna Jansson (anna.jansson@slu.se).
Place: SLU research facility Lövsta, just outside of Uppsala.
Preliminary schedule: Spring and summer 2025 (from cow release).
