Abstract
The aim of the research was to study the influence of sowing methods (cover crop, sowing method) of variegated alfalfa Victoria on its seed productivity in the Cis-Middle Urals. The research was conducted in 2019–2023 on sod-podzolic medium loamy soil of the Udmurt Republic. Meteorological conditions of the growing seasons during the research years were contrasting. The regrowth of alfalfa was noted on average in the 2nd-3rd decade of April, harvesting for seeds was carried out in the 1st-2nd decade of September, the vegetation period lasted 124–142 days. Over four years of using the grass stand, it was found that variable alfalfa forms seed productivity at a fairly high level: in the first year of use – 570-759 kg/ha, in subsequent years – 234–309 kg/ha. On average, the highest seed yield was obtained when sowing in wide rows (60 cm) in variants with cover crops of spring wheat (360 kg/ha) and vetch-oat mixture for green mass (359 kg/ha), with the formation of the following structural elements: the number of generative shoots - 238 and 279 pcs/m 2 , the number of brushes on a shoot – 16.0 and 15.5 pcs, pods on a brush – 6.9 and 7.9 pcs, seeds in a pod – 3.3 and 2.8 pcs, the weight of 1000 seeds is 1.94 and 1.96 g, respectively. The number of brushes on a shoot and the number of pods on a brush had an average positive effect on the yield level, correlation coefficients r=0.47 and r=0.53, respectively. Laboratory seed germination in the harvest was at the level of 77–90 %. Relatively the highest germination (90 %) was in wide-row sowings with row spacing of 60 and 30 cm in the variant with a vetch-oat mixture. When cultivating alfalfa for seed purposes, the most energy-efficient method is to use a vetch-oat mixture as a cover crop (energy efficiency coefficient – 5.65); coverless sowing is economically advantageous (profitability level – 556 %).
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Alfalfa regrowth occurred in the second to third decade of April.
- Taxon
- alfalfa
Medicago sativae0 - Outcome
- regrowthe0
- Value
- 2nd-3rd decade of Aprile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The regrowth of alfalfa was noted on average in the 2nd-3rd decade of April”
Claim · model-written summary
The vegetation period lasted 124–142 days.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- vegetation periode0
- Value
- 124–142 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the vegetation period lasted 124–142 days”
t0“alfalfa”
Claim · model-written summary
First-year alfalfa seed productivity was 570–759 kg/ha.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- seed productivitye0
- Value
- 570-759 kg/hae0
- Qualifier
- first year of usee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variable alfalfa forms seed productivity at a fairly high level: in the first year of use – 570-759 kg/ha, in subsequent years – 234–309 kg/ha”
t0“alfalfa”
Claim · model-written summary
Subsequent-year seed productivity was 234–309 kg/ha.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- seed productivitye0
- Value
- 234–309 kg/hae0
- Qualifier
- subsequent yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variable alfalfa forms seed productivity at a fairly high level: in the first year of use – 570-759 kg/ha, in subsequent years – 234–309 kg/ha”
t0“alfalfa”
Claim · model-written summary
Wide rows with spring wheat cover yielded 360 kg/ha of seed.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- wide rows (60 cm) in variants with cover crops of spring wheate0
- Outcome
- seed yielde0
- Direction
- higheste0
- Value
- 360 kg/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest seed yield was obtained when sowing in wide rows (60 cm) in variants with cover crops of spring wheat (360 kg/ha) and vetch-oat mixture for green mass (359 kg/ha)”
t0“alfalfa”
Claim · model-written summary
Wide rows with vetch–oat cover yielded 359 kg/ha of seed.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- vetch-oat mixture for green masse0
- Outcome
- seed yielde0
- Direction
- higheste0
- Value
- 359 kg/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest seed yield was obtained when sowing in wide rows (60 cm) in variants with cover crops of spring wheat (360 kg/ha) and vetch-oat mixture for green mass (359 kg/ha)”
t0“alfalfa”
Claim · model-written summary
Brushes per shoot positively correlated with yield (r=0.47).
- Taxon
- alfalfaMedicago sativat0
- Organ / stage
- brushes on a shoote0
- Outcome
- yield levele0
- Direction
- positive effecte0
- Value
- r=0.47e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of brushes on a shoot and the number of pods on a brush had an average positive effect on the yield level, correlation coefficients r=0.47 and r=0.53, respectively”
t0“alfalfa”
Claim · model-written summary
Pods per brush positively correlated with yield (r=0.53).
- Taxon
- alfalfaMedicago sativat0
- Organ / stage
- pods on a brushe0
- Outcome
- yield levele0
- Direction
- positive effecte0
- Value
- r=0.53e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of brushes on a shoot and the number of pods on a brush had an average positive effect on the yield level, correlation coefficients r=0.47 and r=0.53, respectively”
t0“alfalfa”
Claim · model-written summary
Harvested seed germination ranged from 77–90%.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- Laboratory seed germinatione0
- Value
- 77–90 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Laboratory seed germination in the harvest was at the level of 77–90 %”
t0“alfalfa”
Claim · model-written summary
Wide-row vetch–oat sowings reached 90% germination.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- wide-row sowings with row spacing of 60 and 30 cm in the variant with a vetch-oat mixturee0
- Outcome
- germinatione0
- Direction
- higheste0
- Value
- 90 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relatively the highest germination (90 %) was in wide-row sowings with row spacing of 60 and 30 cm in the variant with a vetch-oat mixture”
t0“alfalfa”
Claim · model-written summary
Vetch–oat cover was the most energy-efficient seed-production method (coefficient 5.65).
- Taxon
- alfalfaMedicago sativat0
- Treatment
- vetch-oat mixture as a cover crope0
- Outcome
- energy efficiency coefficiente0
- Value
- 5.65e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the most energy-efficient method is to use a vetch-oat mixture as a cover crop (energy efficiency coefficient – 5.65)”
t0“alfalfa”
Claim · model-written summary
Coverless sowing had 556% profitability.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- coverless sowinge0
- Outcome
- profitability levele0
- Value
- 556 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“coverless sowing is economically advantageous (profitability level – 556 %)”
t0“alfalfa”
The same questions in other papers
Triticum aestivum · yield · Medicago sativa (alfalfa)Positive and negative results
5 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- negative
5 papers more in this group
See all 9 papers →cover crop · yield · Medicago sativa (alfalfa)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
2 papers more in this group
See all 6 papers →density · growth · Medicago sativa (alfalfa)Positive and negative results
13 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- no effect
13 papers more in this group
See all 17 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.