Denmark is a black seeded Sub-Clover that belongs to the Trifolium subterraneum ssp. subterraneum family. It was derived from material collected at Sardinia and released as part of the National Subterraneum Clover Improvement Program. Denmark demonstrates a prostrate growth habit and persists well on moderate to heavy soil types. It has late season maturity which makes Denmark well suited to medium to high rainfall zones. Denmark is an alternative replacement for Karridale and Mount Barker selected for superior autumn and winter growth rates along with improved disease resistance and prefers regions with 7-8 month growing period. Seedlings of Denmark are generally smaller and more prostrate than that of Karridale and Mount Barker, however, once established growth habit becomes erect during the spring. The levels of hard seed Denmark supply will vary depending on seasonal conditions but would be suitable for either permanent pasture or short to medium term crop rotations. Denmark will provide the benefits of soil nitrogen along with an effective disease break.
Approximately 144 days (Perth)
Denmark, as with all Sub-Clovers, is susceptible to Red Legged Earth Mite, (Halotydeus destructor) Blue-Green Aphid (Acyrthosiphon kondoi), Blue Oat Mite (Penthaleus major) and Spotted Clover Aphid (Therioaphis trifolii). Therefore, control is essential at the early seedling stage and appropriate pest management must be implemented as required.
Denmark has been granted protection under PBR. Unauthorised commercial propagation or any sale, conditioning, export, import or stocking of propagating material of this variety is an infringement under the Plant Breeder’s Rights Act 1994. Heritage Seeds Pty Ltd has an exclusive licence for the production and marketing of Denmark.
- Denmark’s disease resistance and hard seed profile ensures improved productivity and persistence compared to many late season sub clovers, particularly Karridale and Mount Barker
- When Denmark is mixed with other varieties such as Gosse and Napier in high rainfall situations the resulting sward will have increased production and persistence
Denmark is resistant to Clover Scorch (Kabatiella caulivora) and has demonstrated high resistance to strains 0 and 2 of Phytophthora Root Rot (Phytophthora clandestina). Denmark has demonstrated moderate tolerance to Root Rots caused by Pythium (Pythium spp.) and Fusarium (Fusarium spp.) along with moderate resistance to leaf diseases caused by Leaf Rust (Uromyces trifolii-repentis) and Cercospora Leafspot (Cercosprora zebrifsne). Denmark demonstrates superior disease tolerances compared to other Sub-Clover varieties of similar maturity.
Regeneration - Denmark has demonstrated superior seed productivity compared to Mount Barker and Karridale. It is a relatively soft seeded Sub-Clover (<10% hard seed) which is similar to Mount Barker and Karridale. However, if grown in cooler conditions hard seed levels of Denmark can increase to around 29% compared to Karridale (24%) and Mount Barker (9%). This characteristic, along with improved seed yields, proves Denmark to be a more effective long term grazing option in cooler growing regions.
Grazing - Denmark is particularly well suited to grazing and care must be taken with new sown pastures so as not to overgraze too early as plants can be pulled from the ground. Light grazing during the establishment period will help control weeds and encourage dense prostrate growth. Once established, heavy grazing of Denmark up to flowering will improve seed set. When flowering begins, stocking rates should be reduced to optimise seed set.