Abstract
Most significant growing manner tool to gain high seed yield is the understanding about influence of different factors that have important role on winter oilseed rape growing. The lack of knowledge and research on different agro-ecological factors about oilseed rape growing is observed in Latvia. The aim of our research, started in the season of 2007/2008 and continued up to the season of 2010/2011 in Research and Study farm “Vecauce” of Latvia University of Agriculture, was to investigate the influence of agro-ecological factors (sowing date and rate, and fungicide as growth regulator) on seed yield of two types of winter rape cultivars. The observed seed yield results are analyzed in this paper. Rape was sown on five dates, starting with 1 August with ten days intervals. Specific four sowing rates were used in years 2007/2008 and 2008/2009: 120, 100, 80, and 60 germinate able seeds per m2 for ‘Californium’ (line) and 80, 60, 40 and 20 germinate able seeds per m2 for ‘Excalibur’ (hybrid). Equal sowing rates for both varieties were used in 2009/2010 and 2010/2011: from 120 to 20 germinate able seeds per m2 with interval of 20 seeds per m2. Fungicide as growth regulator (Juventus 90 s.c. (metconazole, 90 g L-1) dose: 0.5 L ha-1) was applied for rape plants at 4-6 leaves stage for crop sown on first three sowing dates. The highest average yield from all trial years was observed for variety ‘Californium’ sown on 10 August, and for variety ‘Excalibur’ F1 – sown on 20 August. Winter oilseed rape seed yield was significantly (p<0.05) affected by sowing date. The influence of sowing rate on yield was variable. Fungicide application significantly (p<0.05) increased the seed yield of ‘Californium’ in all trial years, but yield of ‘Excalibur’ – in three out of four trial years: 2008, 2010 and 2011.
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Claims 6
Claim · model-written summary
Californium had its highest average yield when sown on 10 August.
- Taxon
- Oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Material
- ‘Californium’e0
- Treatment
- sown on 10 Auguste0
- Outcome
- average yielde0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“The highest average yield from all trial years was observed for variety ‘Californium’ sown on 10 August”
t0“Oilseed rape (Brassica napus ssp. oleifera)”
Claim · model-written summary
Excalibur F1 had its highest average yield when sown on 20 August.
- Taxon
- Oilseed rapeBrassica napust0
- Material
- ‘Excalibur’e0
- Treatment
- sown on 20 Auguste0
- Outcome
- average yielde1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for variety ‘Excalibur’ F1 – sown on 20 August.”
e1“The highest average yield from all trial years was observed”
t0“Oilseed rape (Brassica napus ssp. oleifera)”
Claim · model-written summary
Sowing date significantly affected winter oilseed rape seed yield.
- Taxon
- Winter oilseed rapeBrassica napuse0
- Treatment
- sowing datee0
- Outcome
- seed yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter oilseed rape seed yield was significantly (p<0.05) affected by sowing date.”
Claim · model-written summary
The influence of sowing rate on yield varied.
- Taxon
- Oilseed rapeBrassica napust0
- Treatment
- sowing ratee0
- Outcome
- yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The influence of sowing rate on yield was variable.”
t0“Oilseed rape (Brassica napus ssp. oleifera)”
Claim · model-written summary
Fungicide application significantly increased Californium seed yield in every trial year.
- Taxon
- Oilseed rapeBrassica napust0
- Material
- ‘Californium’e0
- Treatment
- Fungicide applicatione0
- Outcome
- seed yielde0
- Direction
- increasede0
- Qualifier
- all trial yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungicide application significantly (p<0.05) increased the seed yield of ‘Californium’ in all trial years”
t0“Oilseed rape (Brassica napus ssp. oleifera)”
Claim · model-written summary
Fungicide application significantly increased Excalibur yield in three of four trial years.
- Taxon
- Oilseed rapeBrassica napust0
- Material
- ‘Excalibur’e0
- Treatment
- Fungicide applicatione0
- Outcome
- yielde0
- Direction
- increasede0
- Qualifier
- three out of four trial years: 2008, 2010 and 2011e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungicide application significantly (p<0.05) increased the seed yield of ‘Californium’ in all trial years, but yield of ‘Excalibur’ – in three out of four trial years: 2008, 2010 and 2011.”
t0“Oilseed rape (Brassica napus ssp. oleifera)”
The same questions in other papers
fungicide · yield · Brassica napus (oilseed rape)Results differ
21 papers in the same direction as this paper · 4 in the opposite direction
- positive
- no effect
- negative
22 papers more in this group
See all 26 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.