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Yield stability of single and two-clover grass-clover swards at grazing, cutting and different fertilizer regimes

Eriksen, J.; Askegaard, M. and Søegaard, K. (2012) Yield stability of single and two-clover grass-clover swards at grazing, cutting and different fertilizer regimes. Grass and Forage Science, , pp. 1-12. [Submitted]

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Summary

Increasing plant diversity in grasslands may improve productivity and yield stability. This study investigates in a field experiment, yield and quality of two-species swards of ryegrass/white clover and three-species swards of ryegrass/white and red clover at five different managements representing cutting, grazing, combinations of cutting and grazing and different fertilizer treatments in 1 to 4-yr-old swards. Generally, the three-species mixture produced higher yields than the two-species mixture when swards were young and lower yields when swards were 3 and 4 years old. Fertilizer responses were similar in both mixtures and also rather independent of sward age. The overall mean annual yield increase by slurry application was 1.34 t DM corresponding to approximately 11 kg DM per kg NH4-N. In the three-species mixture there was a shift from red clover dominating in the first two years, to white clover dominating in years 3 and 4. The crude protein content of harvested plant material was not significantly affected by species mixture and variation in crude protein was mainly explained by cutting time.


EPrint Type:Journal paper
Subjects: Crop husbandry > Crop combinations and interactions
Farming Systems > Farm nutrient management
Research affiliation: Denmark > DARCOF III (2005-2010) > ORGGRASS - Grass-clover in organic dairy farming
Deposited By: Eriksen, Senior scientist Jørgen
ID Code:20636
Deposited On:26 Mar 2012 13:42
Last Modified:14 Nov 2012 08:54
Document Language:English
Status:Submitted
Refereed:Submitted for peer-review but not yet accepted

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