2007. wir lassen qualität wachsen winter rapeseed variety trials point of origin: cereal trial...
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2007
LEMBKE R
Wir lassen Qualität wachsen
Optimizing of Plot trials in Oilseed Rape
Finn Holmgaard Jensen,Gerhard Korporal,Norddeutsche Pflanzenzucht,H.-G. Lembke KG,Hohenlieth,Germany
2007
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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
2007
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Neighbour effects in variety trials of Winter rapeseed caused by:
. Genotype
. Winter damage
. Speed of development
. Plant height
. Tendency of lodging
. Earliness/ripening time
2007
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Morphological characteristics of tested Winterrape GenotypesHohenlieth 1999
Büchse (2001)
Variety Plant heigth Standability Ripening (9 = no lodging) (9 = early) 1 144 9 6,62 139 9 5,33 165 8,8 6,24 165 5,3 6,25 170 6,5 5,96 170 6,4 6,3
5 and 6 = Hybrids
2007
Variety Single Double Tripple Bordered plot Centre plot plot plots plots (NPZ system) (of tripple)
1 91 95 93 98 942 83 92 91 96 963 94 90 96 98 984 107 101 98 95 975 115 112 115 108 1116 111 111 108 106 105
LSD(5%, t-Test) 11,9 7,1 6,7 7 9,4LSD(5%, t-Test) for Interaktion Variety x Plottype = 8,3
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Seed yield (rel.) from Winter rape varieties tested in different plot trial systems
Hohenlieth 1999
Büchse (2001)
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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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NPZ Plot drilling Machine for Bordered Plots in Winterrape (Draft)
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NPZ-Drillmaschine für Kerndruschparzellen bei Winterraps
(Werkphoto)
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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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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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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)
LEMBKE R
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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
Thank you
for your attention