Abstract
This study was conducted to evaluate the yield and persistence of seven contrasting alfalfa (Medicago sativa L. sensu lato) strains growing in binary mixture with smooth bromegrass (Bromus inermis Leyss.) under different fertilizer and cutting managements. The alfalfa strains were seeded in mixtures with smooth bromegrass in 1980 in northeast Saskatchewan and harvested each year, 1982 through 1987. Two fertilizer treatments (0 and 18 kg ha −1 P) and two cutting managements (2 and 3-4 cuts) were imposed annually. The application of P fertilizer increased the total yield (6-yr average) from 1.47 t ha −1 in control plots to 2.52 t ha −1 in the fertilized plots. Frequent cutting reduced average total yield from 2.59 t ha −1 (2-cut system) to 1.4 t ha −1 . Fertility and cutting management did not affect the proportion of alfalfa or weeds in the harvested herbage. The alfalfa strain significantly affected total yield and the proportion of alfalfa and weeds throughout the years of this study. The strain ScMf3713, a M. sativa subsp. falcata (L.) Arcang. type, outyielded all entries during the last 3 yr of this study. The study suggests that alfalfa strains of the falcata subspecies germplasm showed superior long-term performance when the alfalfa was grown in a binary mixture with bromegrass. Key words: Medicago sativa L., falcata, Bromus inermis Leyss., phosphorus, simulated grazing
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Claims 7
Claim · model-written summary
P fertilizer application increased 6-year average total alfalfa yield from 1.47 to 2.52 t/ha relative to control plots.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- application of P fertilizere1
- Outcome
- total yielde1
- Direction
- increasede1
- Value
- 2.52 t ha −1e1
- Qualifier
- 6-yr averagee1
- Comparator
- control plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seven contrasting alfalfa (Medicago sativa L. sensu lato) strains growing in binary mixture with smooth bromegrass”
e1“The application of P fertilizer increased the total yield (6-yr average) from 1.47 t ha −1 in control plots to 2.52 t ha −1 in the fertilized plots”
Claim · model-written summary
Frequent cutting reduced average total alfalfa yield from 2.59 to 1.4 t/ha compared with the 2-cut system.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- Frequent cuttinge2
- Outcome
- average total yielde2
- Direction
- reducede2
- Value
- 1.4 t ha −1e2
- Comparator
- 2-cut systeme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seven contrasting alfalfa (Medicago sativa L. sensu lato) strains growing in binary mixture with smooth bromegrass”
e2“Frequent cutting reduced average total yield from 2.59 t ha −1 (2-cut system) to 1.4 t ha −1”
Claim · model-written summary
Fertility did not affect the proportion of alfalfa or weeds in the harvested herbage.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- Fertilitye3
- Outcome
- proportion of alfalfa or weedse3
- Direction
- did not affecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seven contrasting alfalfa (Medicago sativa L. sensu lato) strains growing in binary mixture with smooth bromegrass”
e3“Fertility and cutting management did not affect the proportion of alfalfa or weeds in the harvested herbage”
Claim · model-written summary
Cutting management did not affect the proportion of alfalfa or weeds in the harvested herbage.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- cutting managemente3
- Outcome
- proportion of alfalfa or weedse3
- Direction
- did not affecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seven contrasting alfalfa (Medicago sativa L. sensu lato) strains growing in binary mixture with smooth bromegrass”
e3“Fertility and cutting management did not affect the proportion of alfalfa or weeds in the harvested herbage”
Claim · model-written summary
The alfalfa strain significantly affected total yield and the proportion of alfalfa and weeds across the years of the study.
- Taxon
- alfalfaMedicago sativae0
- Material
- alfalfa straine5
- Outcome
- total yield and the proportion of alfalfa and weedse5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seven contrasting alfalfa (Medicago sativa L. sensu lato) strains growing in binary mixture with smooth bromegrass”
e5“The alfalfa strain significantly affected total yield and the proportion of alfalfa and weeds throughout the years of this study”
Claim · model-written summary
Strain ScMf3713, an M. sativa subsp. falcata type, outyielded all other entries during the last 3 years of the study.
- Taxon
- alfalfaMedicago sativae0
- Material
- ScMf3713e6
- Outcome
- outyielded all entriese6
- Direction
- outyieldede6
- Qualifier
- during the last 3 yr of this studye6
- Comparator
- all entriese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seven contrasting alfalfa (Medicago sativa L. sensu lato) strains growing in binary mixture with smooth bromegrass”
e6“The strain ScMf3713, a M. sativa subsp. falcata (L.) Arcang. type, outyielded all entries during the last 3 yr of this study”
Claim · model-written summary
Alfalfa strains of the falcata subspecies germplasm showed superior long-term performance when grown in a binary mixture with bromegrass.
- Taxon
- alfalfa strainsMedicago sativae7
- Material
- falcata subspecies germplasme7
- Treatment
- binary mixture with bromegrasse7
- Outcome
- long-term performancee7
- Direction
- superiore7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The study suggests that alfalfa strains of the falcata subspecies germplasm showed superior long-term performance when the alfalfa was grown in a binary mixture with bromegrass”
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