PhD position in Animal Science; Ref The Department of Animal Nutrition and Management (HUV) conduct basic and applied research focused on feed, nutrition and management of production animals. The goal is to create a sustainable and profitable production with good animal care that provides high quality food.

Our department is responsible for undergraduate education, research and postgraduate education in the subject areas of nutritional physiology, feed science, management issues and aquaculture. HUV offers an inspiring research environment where we study metabolic processes and nutrient utilization in animals, management in various animal production systems.

Our research in poultry focuses on broiler chickens and laying hens with a focus on nutrition, housing and management.  Our goal is to conduct need-driven research that generate new knowledge that combines improved animal welfare, high competitiveness and low environmental cost. The food should have high quality and be safe for consumers.

Our research comprises both conventional and alternative production systems for layers and broiler chickens. PhD project: Reduction of ammonia volatilization in laying hen facilities by adjusted feed composition, Doctoral education subject: Animal Science

Description: Within Swedish egg production, high ammonia levels are considered as the major environmental challenge. The majority of Swedish hens are kept in cage-free systems with access to a littered area which increases the behavioural repertoire of the laying hen in a positive way. However, manure accumulating in the litter will increase the ammonia concentration in the indoor air, as nitrogen in the manure is converted to ammonia by bacteria and in chemical processes.

Lower levels of crude protein in the feed and thereby nitrogen in the manure decrease the risk of ammonia formation, however, a certain level of nitrogen in the feed is needed as building blocks for protein. Increased level of fibre in the feed might potentially also reduce the ammonia volatilization by increasing the microbial activity so more nitrogen is excreted as microbial more stable protein. 

The present project aims to evaluate if adjusted levels of crude protein, amino acids and fibre in the feed can lower the ammonia volatilization from the litter in laying hen facilities while animal performance and welfare are maintained. 

Work tasks:

The project involves experiments with laying hens at SLU:s research facility outside Uppsala. The work tasks include planning of trials, practical work at the research facility when trials are running, data collection, laboratory work, statistical analyses and scientific publication. The student is expected to participate in teaching at BSc and MSc level.


A university degree of at least 240 higher education credits is required, see below. We are looking for a candidate who have a degree in Animal Science, Veterinary Medicine, Biology or in an equivalent subject. You must have a proven ability to communicate in written and oral English. Therefore, upper secondary school grade equivalents to English B/English 6 are required.

Experience of laboratory work, molecular methods, microbiota analysis and a general knowledge about poultry and their nutrition is a merit. You should have driving license (Swedish, class B). Personal suitability for the work tasks, such as good collaboration skills, ability to work independently, flexibility and good analytic and problem solving capacity, will be of great importance in the assessment of candidates.

The application, written in Swedish or in English, should include a description of why this research project is of interest to you (max one A4-page).

Place of work:Uppsala

Forms for funding or employment: Employment (4 years) 

Starting date: According to agreement. 


Click the “Apply” button to submit your application. The deadline is 2023-08-07. To qualify for third-cycle (Doctoral) courses and study programmes, you must have a second-cycle (Master’s) qualification. Alternatively, you must have conducted a minimum of four years of full-time study, of which a minimum of one year at second-cycle level.

Applicants will be selected based on their written application and CV, degree project, copies of their degree certificate and transcript of records from previous first and second-cycle studies at a university or higher education institution, two personal references, and knowledge of English.

Please note that applicants invited to interview must submit attested copies of their degree certificate, or equivalent, a transcript of records from previous first and second-cycle studies at a university or higher education institution. Applicants who are not Swedish citizens need to submit an attested copy of their passport’s information page containing their photograph and personal details.

The Swedish University of Agricultural Sciences (SLU) has a key role in the development for sustainable life, based on science and education. Through our focus on the interaction between humans, animals and ecosystems and the responsible use of natural resources, we contribute to sustainable societal development and good living conditions on our planet.

Our main campuses are located in Alnarp, Umeå and Uppsala, however, the university also operates at research stations, experimental forests and teaching sites throughout Sweden. SLU has around 3,000 employees, 5,000 students and doctoral students and a turnover of over SEK 3 billion.

We are investing in attractive environments on all of our campuses. We strive to provide a work environment characterised by inclusivity and gender equality, where different experiences generate conversations between people and pave the way for science, creativity and development. Therefore, we welcome applications from people with diverse backgrounds and perspectives.

Contact person:

Emma Ivarsson, Senior Lecturer +4618672044

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