Claim · model-written summary
Diploid cultivars were significantly less productive than tetraploids in year four.
- Taxon
- red clover
Trifolium pratenset0 - Material
- diploidse0
- Outcome
- less productivee0
- Direction
- lesse0
- Qualifier
- fourth yeare0
- Comparator
- tetraploidse0
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the diploids were significantly less productive than the tetraploids in the fourth year”
t0“red clover”
Title
Productivity of red clover grown alone and with companion grasses over a four‐year period
J. M. McBRATNEY Grass and Forage Science 1981. doi:10.1111/j.1365-2494.1981.tb01564.x
Other claims from this paper (13)
- Observation Essex was significantly less productive and persistent than the other five cultivars when grown alone.
- Observation The five cultivars had mean annual total dry matter yield of 12·2 to 13·2 t ha ‐1 over four years, without significant differences.
- Observation The five cultivars had mean annual clover dry matter yield of 9·2 to 10·2 t ha ‐1 over four years, without significant differences.
- Observation Companion grasses provided little or no total dry matter yield advantage through year three.
- Observation In year four, clover alone tended to yield less than clover and grass mixtures, especially for diploids.
- Observation With companion grasses, Essex and Hungaropoly had lower yield and contribution than other cultivars.
- Observation Timothy contributed less to total dry matter yield than tall fescue and perennial ryegrass.
- Observation Perennial ryegrass had the most variable annual contribution.
- Observation Tall fescue was the most consistent contributor and yield and clover-grass balance changed little over four years.
- Observation Dry matter digestibility showed no pronounced difference between treatments.
- Observation Crude protein concentration was similar in pure clover and clover-timothy, and both appeared superior to clover-ryegrass and clover-fescue mixtures.
- Recommendation The authors consider red clover-dominant swards suitable for cutting, with high low-cost dry matter yields for up to four years.
- Observation The authors state that red clover-dominant swards are self-sufficient in nitrogen and can accumulate soil nitrogen for subsequent crops.