Abstract
In the rainfed arable land of the Mediterranean basin mixtures of oat and common vetch are planted for haymaking (Caballero et al. 1995, Assefa & Ledin 2001), and to improve the nutritive value of the forage (Thomson et al. 1990). The objective of this research was to evaluate the influence of different oat : vetch seeding rates on forage yield and quality. Field experiments were conducted under rainfed conditions in 1996-97 and 1997-98 growing seasons at Policoro, Southern Italy. The oat (O) and vetch (V) monocrops were compared with three O:V (70:30, 50:50; 30:70) seeding rates. Relative yields (RY) were calculated and the RY Total (RYT) was used as criterion for mi-xed stand advantage. N-total was determined to measure the forage quality. The seasons were different in total rainfall that contributed greatly to the results. Mean forage production (DMY) of mixtures was not significantly affected by increasing seeding rate of oat over the range used. Seeding rates of O did not influence botanical composition of mixtures. Decreasing O seed proportions, O mean contribution to DMY dropped by 20%, RY of O de-creased by 30%, and RY of V increased by 185%. For mixtures with 30% for oat, RYT exceeded unity suggesting a mixed stand advantage at lower oat seeding proportion. Forage quality was not significantly influenced by studied mixture rates. In conclusion, the net effect of oat in the mixture was to increasing competition as oat density increased. Assefa, G. & Ledin, I. 2001. Animal Feed Science and Technology 92: 95- 111; Caballero et al. 1995. Field Crops Research 41:135-140; Thomson et al. 1990. Experimental Agriculture 26: 49-56.
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Claims 8
Claim · model-written summary
Increasing oat seeding rate did not significantly affect mean mixture forage production.
- Taxon
- oat
Avena sativae0 - Treatment
- increasing seeding rate of oate0
- Outcome
- Mean forage production (DMY) of mixturese0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mean forage production (DMY) of mixtures was not significantly affected by increasing seeding rate of oat over the range used”
Claim · model-written summary
Oat seeding rate did not influence mixture botanical composition.
Not reportedTaxonComparator
Verbatim
e0“Seeding rates of O did not influence botanical composition of mixtures”
Claim · model-written summary
Decreasing oat seed proportion lowered oat contribution to DMY by 20%.
- Taxon
- Oe0
- Treatment
- Decreasing O seed proportionse0
- Outcome
- O mean contribution to DMYe0
- Direction
- droppede0
- Value
- 20%e0
Not reportedComparator
Verbatim
e0“Decreasing O seed proportions, O mean contribution to DMY dropped by 20%”
Claim · model-written summary
Decreasing oat seed proportion lowered oat relative yield by 30%.
Not reportedComparator
Verbatim
e0“Decreasing O seed proportions, O mean contribution to DMY dropped by 20%, RY of O de-creased by 30%”
Claim · model-written summary
Decreasing oat seed proportion increased vetch relative yield by 185%.
Not reportedComparator
Verbatim
e0“Decreasing O seed proportions, O mean contribution to DMY dropped by 20%, RY of O de-creased by 30%, and RY of V increased by 185%”
Claim · model-written summary
At 30% oat, RYT exceeded unity, suggesting a mixed stand advantage.
- Taxon
- oatAvena sativae0
- Outcome
- RYTe0
- Direction
- exceedede0
- Value
- 30% for oate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For mixtures with 30% for oat, RYT exceeded unity suggesting a mixed stand advantage at lower oat seeding proportion”
Claim · model-written summary
Mixture rates did not significantly influence forage quality.
Not reportedTaxonComparator
Verbatim
e0“Forage quality was not significantly influenced by studied mixture rates”
Claim · model-written summary
Oat competition increased as its density increased in mixtures.
- Taxon
- oatAvena sativae0
- Treatment
- oat densitye0
- Outcome
- competitione0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“net effect of oat in the mixture was to increasing competition as oat density increased”
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See all 54 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.