Contact
Gruber Leonhard, Univ.-Doz. Dr.

Gruber Leonhard, Univ.-Doz. Dr.

former research assistants
Download information as: vCard

former research assistant

Animal health in focus - collaborations with VetMed

Working together for animal health, animal welfare and sustainable livestock farming: The University of Veterinary Medicine Vienna and the HBLFA Raumberg-...

Influence of the use and live weight of dairy cows on the nutrient efficiency, environmental impact and economic viability of milk production

Improvements in feed quality and husbandry conditions, as well as new breeding methods and advances in breeding, have increased the performance of cattle...

Investigations to update feed assessment at the Rosenau feed laboratory

The digestibility of the organic matter determines the majority of a feed's energy concentration. A high-quality method for i...

Efficient Cow - Final Report

Efficient Cow - Final Report: Analysis and optimization of production efficiency and environmental impact in Austrian cattle farming ...

Update of the energy and protein assessment of basic feedstuffs based on chemical analyses and in vitro studies

The aim of the project is the development and selection of cost-effective methods suitable for routine analyses for the energy and protein assessment of...

Feed evaluation of ruminant rations based on high-sugar hay in vivo and in situ

The use of high quantities of concentrated feed in ruminant feeding has become increasingly established, although it has both animal health and environmental concerns...

Determination and assurance of the origin of Styrian agricultural and forestry products

As a reaction to increasing globalization and the free movement of goods, the importance of the regional origin of traded goods has increased...

Influence of the preservation method on the feed value and milk production of meadow forage

 Recommendations for the best possible method of preserving meadow fodder...

Purpose of dairy cows

The experimental design involves comparing four different genotypes (Simmental, HF conventional breeding, HF from New Zealand, HF special...

Nutritional evaluation of a chemical-thermal processing technique for feed barley

Dairy cows play a central role in Austrian agriculture. This is primarily due to economic conditions...

Use of zeolite and microorganisms in dairy cattle feeding

This project will investigate the effects of natural zeolite (clinoptilolite) and an aroma compound (herbal extract with lactic acid bacteria)...

Influence of age at first calving on milk yield and productive lifespan of dairy cows

The present project aims to determine the optimal rearing intensity for calves and heifers of the cattle breeds kept in Austria...

Influence of the preservation method of meadow forage on nutrient losses, feed value, milk production and milk quality

As part of a research project on the conservation of meadow forage, a modern hay drying system (frequency-controlled fan, dehumidification...) is being used.

Determination of the protein digestibility of clover grass silage and alfalfa meal by fattening pigs

Due to the gradual reduction of the use of conventional feed in organic farming to zero percent in 2012, a protein feed...

Testing the feed value of current silage maize varieties

The yield and feed value of silage maize are determined by several factors. Besides the stage of vegetation and location, the influence of...

Use of Starprot in dairy cattle feeding

 In Lower Austria (Weitersfeld, Waldviertel), the stillage produced during alcohol production from wheat and corn is processed in a special manner...

Influence of the vegetation stage of meadow forage

The vegetation stage is the decisive factor influencing the nutritional value of meadow forage. In addition to the basic findings on forage intake...

Analysis of basic and concentrated feed according to the Cornell Net Carbohydrate and Protein System and in-situ method

As part of the scientific work "Analysis of basic and concentrated feed according to the Cornell Net Carbohydrate and Protein System and the in-situ...

Feed intake of dairy cows during the dry period

The main factors influencing feed intake in lactating dairy cows have been studied in recent years at the Institute for Livestock Research...

Studies on nutrient mobilization in dairy cows during lactation

Due to the reproductive process, a dairy cow's metabolism undergoes profound changes during lactation and the subsequent dry period...

Feed intake and digestibility (in vivo) of meadow forage at different vegetation stages

The stage of vegetation has a decisive influence on the nutritional value of grassland forage. The present experiment aims to investigate this influence...

Influence of energy supply before and after calving

The present project aims to investigate the influence of insufficient and excessive energy supply compared to standard-compliant supply before and after calving...

Grassland management and milk production

This project examines the relationship between the intensity of grassland management and milk production. It aims to...

Feed intake estimation formulas for dairy cows

As part of a scientific project, all feeding trials conducted by the HBLFA Raumberg-Gumpenstein were analyzed to determine the underlying principles...

2301: GF III

Analysis of basic and concentrated feed according to the Cornell Net Carbohydrate and Protein System and the in-situ method

2311: Manure trial

Comparison of permanent grassland under different fertilization levels

2345: NEFA

Nutrient flows, forage yields and biodiversity in differentiated grassland management in Austria

2355: Rumen sensor

Relationships between rumen pH and feeding, and their significance for animal health

2361: Pumpkin diseases - Krakü

Investigations into the biology of Didymella bryoniae and monitoring of diseases and pests of the Styrian oil pumpkin in Austria.

2370: PanSens II

Effect of different forage qualities on parameters of rumen fluid in cattle

2371: Hay drying

Influence of the preservation method of meadow forage on nutrient losses, feed value, milk production and milk quality

2376: Maststier_hoch

Bull fattening for high final weights with varying protein supply in the final fattening phase – impact on daily weight gain, slaughter performance, meat quality and profitability

2394: optGERSTE

Nutritional evaluation of a chemical-thermal processing technique for feed barley in the ration of dairy cows in early lactation

2398: Milk efficiency

Influence of the use and live weight of dairy cows on the nutrient efficiency, environmental impact and economic viability of milk production

2402: Functional lining

Functional feed for cows – added value as nutritional value; scientists and students are working together to improve the functional properties of feed for dairy cows

2407: GRP

Influence of the preservation method on the feed value and milk production of meadow forage

2421: PowerStreams

The self-cleaning capacity of flowing waters under the pressure of increasing nutrient load

2423: Mast Efficiency

Dairy-focused cattle breeds in bull fattening - performance, meat quality, efficiency, economic viability and environmental impact of 3 Holstein Friesian genotypes and Fleckvieh

2432: DairyMast

Fattening ability, slaughter performance and meat quality of offspring from dairy sheep and dairy goat farming

2438: Update on feed value

Update of the energy and protein assessment of basic feedstuffs based on chemical analyses and in vitro studies

2443: Millet_Innobrotics

Nutritional value and suitability for ensiling of whole-plant silages of different millet varieties in cattle feeding

2956: Protein supply - dairy cows

Influence of protein supply on feed intake, milk yield, rumen and blood parameters, animal health and nitrogen excretion in dairy cows

3486: WT: Meadow feed CNCPS in situ

Analysis of basic and concentrated feed according to the Cornell Net Carbohydrate and Protein System and the in-situ method for evaluating international energy and protein systems

3546: WT: Clover pig

Determination of the protein digestibility of clover grass silage and alfalfa meal by fattening pigs

3567: WT: Half-day pasture

Feed intake and milk yield of dairy cows kept indoors or on half-day pasture with the aim of saving protein concentrate feed

3586: WT: Milk fatty acid

Fatty acid profiles of Austrian alpine, pasture and shelf milk, as well as milk from intensive production

3643: WT MIR ration

Influence of ration composition on the mid-infrared spectrum of cow's milk