1. 2007

2. Winter rapeseed Variety Trials
Point of origin: Cereal Trial technique
High use of labour in trials
Difficult establishment and high trial errors
high Interaction (Genotype x Environment)
High Neighbour effect between genotypes
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2007

3. Neighbour effects in variety trials of Winter rapeseed caused by:
. Genotype
. Winter damage
. Speed of development
. Plant height
. Tendency of lodging
. Earliness/ripening time
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2007

4. Morphological characteristics of tested Winterrape Genotypes Hohenlieth 1999
Büchse (2001)
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2007

5. Seed yield (rel.) from Winter rape varieties tested in different plot trial systems Hohenlieth 1999
Büchse (2001)
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2007

6. Mean Neighbouring Effect (One-sided neighbour)
Plant heigth Difference 10 cm = 0,510 Hkg/ha
Lodging Difference 1 Note = 0,507 Hkg/ha
Genotype Hybrid / Line = 0,662 Hkg/ha
from Büchse (2000), Datenbasis:BSV/EU-Versuche 1997, 1998, 1999
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7. NPZ Plot drilling Machine for Bordered Plots in Winterrape (Draft)
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8. NPZ-Drillmaschine für Kerndruschparzellen bei Winterraps
(Werkphoto)
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9. Technical specifications for NPZ Bordered Plots (Kerndrusch Parzelle)
1,75 m width of Plots („Centre“)
5 Drilling Rows
28 cm Row distance
63 cm distance between edge rows of Centre and first border rows of 2 on each side of Centre
3,50 m total width of Bordered plot system
Strengthening and prolongation of frame of Drilling machine
Higher placing of drilling cone.
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15. Harvest Technique for Bordered Plot system
Separation of Centre and Border rows
Swathing and harvest of Centre = Harvest plot
Or direct Harvest of Centre
Total width of Plot combiner ca. 2,10 m
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22. Advantages of NPZ Bordered Plot system (compared to double plots)
Half the working hours by drilling and harvest
Very accurate yield-ranking of varieties caused by exclusion of neighbour effects
Improving of LSD values as for double plots (can give possibilities for reduction in number of replications)
Improved differentiation in lodging (as for double plots)
Possibilities for using the border rows for late scoring of stem diseases (Phoma, Verticillium)
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23. Disadvantages of Bordered plot system (Compared to single- and double plots)
Increased need of land for trials (same as for double plots)
Bigger tractor (ca. 50 HP) recommended for drilling
More working hours for separation of harvest plots and border + manual preparations for swathing
Suitable Plot combiner for bordered plot system
Need of big combiner for harvest of borders
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29. Thank you
for your attention