Research project TGV: Multispecies leys for increased feed autonomy

General introduction

Alternating arable crops with temporary (herb-rich) grassland is recognized as a strategy for a more sustainable crop rotation in the dairy farming sector. However, it is not yet very clear which species and varieties of grass, clover, and herbs should be mixed to create a reliable and productive grass-herb mixture that maximizes both yield and the intended ecosystem services. The objective of the TGV project is to test various grass-clover-herb mixtures on farms and to calculate the environmental and economic impacts they generate for the dairy farm.

Research approach

In yield trials conducted at various locations in Flanders, different varieties and species of grass, clover, and herbs are being tested. The researchers then develop guidelines for formulating mixtures. These mixtures are evaluated quantitatively, not only in terms of yield but also in terms of their value for ecosystem services, such as the reduction of nitrate leaching due to the presence of ryegrass. Notably, the mixtures are scored as a whole, rather than just each individual component separately. The economic added value is also assessed. 

Relevance/Valorization

Successful cultivation of grass-legume mixtures can reduce dairy farms’ dependence on imported protein and crop protection products. The results of this project may be very useful to breeders and seed companies in developing more productive grass-legume mixtures. 

Financing

VLAIO - Agentschap Innoveren & Ondernemen