Abstract
The climate of the Rostov region is gradually becoming arid. Therefore, winter wheat crops suffer from autumn drought, which results in germination decrease and the necessity to increase the seeding rate. However, new varieties developed in the Agricultural research center “Donskoy” have high energy of tillering both in autumn and in spring, which makes it possible to reduce the seeding rates without crop productivity decrease. The purpose of the current study was to determine the optimal seeding rates for soft winter wheat variety ‘Krasa Dona’ at different planting dates, which allow obtaining high yields with maximum economic efficiency of grain production. The trials were carried out in the southern part of the Rostov region in 2017–2019. The current study has shown that planting dates significantly affect the productivity of winter bread wheat variety ‘Krasa Dona’ sown after such preceding crops as weedfree fallow and sunflower. When the variety was sown in a weedfree fallow on September 10, the productivity was 7.43–7.62 t/ha, on September 20 it was 8.12–8.26 t/ha, on September 30 it was 7.96–8.11 t/ha, on October 10 it was 7.31–7.62, i.e. there was a significant difference between the variants with seeding rates only at the late sowing period. The seeding rate increase at the late sowing periods, even with profitability decrease, has contributed to an additional conditional net income of up to 1470–1670 rubles/ha due to productivity improvement. Depending on a sowing period, the productivity of the winter bread wheat sown after sunflower was 5.23–5.92 t/ha. Furthermore, an increase in seeding rate from 5 to 6–7 million/ha resulted in productivity increase only by 0.08–0.23 t/ha. When ‘Krasa Dona’ was sown on September 20, September 30 and October 10, the maximum conditional net income 27554–32174 rubles/ha at a seeding rate of 6 million/ha was obtained, that was 536–1064 rubles/ha more than in the variant with a seeding rate of 5 million/ha. Different planting dates and seeding rates had no significant effect on the qualitative traits of grain.
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Claims 13
Claim · model-written summary
Planting dates significantly affected Krasa Dona productivity after fallow and sunflower.
- Taxon
- winter bread wheat
Triticum aestivume0 - Material
- ‘Krasa Dona’e0
- Treatment
- planting datese0
- Outcome
- productivitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“planting dates significantly affect the productivity of winter bread wheat variety ‘Krasa Dona’ sown after such preceding crops as weedfree fallow and sunflower”
Claim · model-written summary
September 10 fallow sowing yielded 7.43–7.62 t/ha.
- Taxon
- winter bread wheatTriticum aestivumt0
- Treatment
- September 10e0
- Outcome
- productivitye0
- Value
- 7.43–7.62 t/hae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the variety was sown in a weedfree fallow on September 10, the productivity was 7.43–7.62 t/ha”
t0“WINTER BREAD WHEAT”
Claim · model-written summary
September 20 fallow sowing yielded 8.12–8.26 t/ha.
- Taxon
- winter bread wheatTriticum aestivumt0
- Treatment
- September 20e0
- Outcome
- 8.12–8.26 t/hae0
- Value
- 8.12–8.26 t/hae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on September 20 it was 8.12–8.26 t/ha”
t0“WINTER BREAD WHEAT”
Claim · model-written summary
September 30 fallow sowing yielded 7.96–8.11 t/ha.
- Taxon
- winter bread wheatTriticum aestivumt0
- Treatment
- September 30e0
- Outcome
- 7.96–8.11 t/hae0
- Value
- 7.96–8.11 t/hae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on September 30 it was 7.96–8.11 t/ha”
t0“WINTER BREAD WHEAT”
Claim · model-written summary
October 10 fallow sowing yielded 7.31–7.62.
- Taxon
- winter bread wheatTriticum aestivumt0
- Treatment
- October 10e0
- Outcome
- 7.31–7.62e0
- Value
- 7.31–7.62e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on October 10 it was 7.31–7.62”
t0“WINTER BREAD WHEAT”
Claim · model-written summary
Seeding-rate variants differed significantly only at late sowing.
- Taxon
- winter bread wheatTriticum aestivumt0
- Treatment
- seeding ratese0
- Outcome
- significant differencee0
- Qualifier
- late sowing periode0
- Comparator
- variantse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a significant difference between the variants with seeding rates only at the late sowing period”
t0“WINTER BREAD WHEAT”
Claim · model-written summary
Increasing seeding rate at late sowing added up to 1470–1670 rubles/ha in conditional net income.
- Taxon
- winter bread wheatTriticum aestivumt0
- Treatment
- seeding rate increasee0
- Outcome
- conditional net incomee0
- Direction
- additionale0
- Value
- 1470–1670 rubles/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seeding rate increase at the late sowing periods, even with profitability decrease, has contributed to an additional conditional net income of up to 1470–1670 rubles/ha due to productivity improvement”
t0“WINTER BREAD WHEAT”
Claim · model-written summary
Increasing seeding rate at late sowing decreased profitability.
- Taxon
- winter bread wheatTriticum aestivumt0
- Treatment
- seeding rate increasee0
- Outcome
- profitabilitye0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seeding rate increase at the late sowing periods, even with profitability decrease”
t0“WINTER BREAD WHEAT”
Claim · model-written summary
Yield after sunflower ranged 5.23–5.92 t/ha across sowing periods.
- Taxon
- winter bread wheatTriticum aestivume0
- Outcome
- productivitye0
- Value
- 5.23–5.92 t/hae0
- Qualifier
- sown after sunflowere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Depending on a sowing period, the productivity of the winter bread wheat sown after sunflower was 5.23–5.92 t/ha”
Claim · model-written summary
Increasing seeding rate from 5 to 6–7 million/ha raised yield only 0.08–0.23 t/ha.
- Taxon
- winter bread wheatTriticum aestivumt0
- Treatment
- increase in seeding rate from 5 to 6–7 million/hae0
- Outcome
- productivitye0
- Direction
- increasee0
- Value
- 0.08–0.23 t/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in seeding rate from 5 to 6–7 million/ha resulted in productivity increase only by 0.08–0.23 t/ha”
t0“WINTER BREAD WHEAT”
Claim · model-written summary
Six million/ha seeding gave maximum conditional net income of 27554–32174 rubles/ha on three sowing dates.
- Taxon
- winter bread wheatTriticum aestivumt0
- Material
- ‘Krasa Dona’e0
- Treatment
- 6 million/hae0
- Outcome
- conditional net incomee0
- Direction
- maximume0
- Value
- 27554–32174 rubles/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When ‘Krasa Dona’ was sown on September 20, September 30 and October 10, the maximum conditional net income 27554–32174 rubles/ha at a seeding rate of 6 million/ha was obtained”
t0“WINTER BREAD WHEAT”
Claim · model-written summary
Six million/ha produced 536–1064 rubles/ha more income than five million/ha.
- Taxon
- winter bread wheatTriticum aestivumt0
- Treatment
- 6 million/hat1
- Outcome
- 536–1064 rubles/ha moree0
- Direction
- moree0
- Value
- 536–1064 rubles/hae0
- Comparator
- 5 million/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that was 536–1064 rubles/ha more than in the variant with a seeding rate of 5 million/ha”
t0“WINTER BREAD WHEAT”
t1“6 million/ha”
Claim · model-written summary
Planting dates and seeding rates did not significantly affect grain quality traits.
- Taxon
- winter bread wheatTriticum aestivumt0
- Treatment
- planting dates and seeding ratese0
- Outcome
- qualitative traits of graine0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Different planting dates and seeding rates had no significant effect on the qualitative traits of grain”
t0“WINTER BREAD WHEAT”
The same questions in other papers
density · yield · Triticum aestivum (wheat)Positive and negative results
375 papers in the same direction as this paper · 115 in the opposite direction · 7 reporting no difference from an alternative
- positive
- no effect
- no effect
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