Transcript Optimizing of Plot trials in Oilseed Rape

Optimizing of Plot trials in
Oilseed Rape
Finn Holmgaard Jensen,
Gerhard Korporal,
Norddeutsche
Pflanzenzucht,
H.-G. Lembke KG,
Hohenlieth,
Germany
2007
R
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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Neighbour effects in variety trials of
Winter rapeseed caused by:
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Genotype
Winter damage
Speed of development
Plant height
Tendency of lodging
Earliness/ripening time
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Morphological characteristics of tested Winterrape Genotypes
Hohenlieth 1999
Variety
Plant heigth
Standability
(9 = no lodging)
Ripening
(9 = early)
1
2
3
4
5
6
5 and 6 = Hybrids
144
139
165
165
170
170
9
9
8,8
5,3
6,5
6,4
6,6
5,3
6,2
6,2
5,9
6,3
Büchse (2001)
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Seed yield (rel.) from Winter rape varieties tested
in different plot trial systems
Hohenlieth 1999
Variety
Single
plot
Double
plots
Tripple
plots
Bordered plot Centre plot
(NPZ system) (of tripple)
1
91
95
93
2
83
92
91
3
94
90
96
4
107
101
98
5
115
112
115
6
111
111
108
LSD(5%, t-Test)
11,9
7,1
6,7
LSD(5%, t-Test) for Interaktion Variety x Plottype = 8,3
98
96
98
95
108
106
7
Büchse (2001)
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94
96
98
97
111
105
9,4
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Mean Neighbouring Effect
(One-sided neighbour)
Plant heigth Difference 10 cm = 0,510 Hkg/ha
Lodging
Genotype
Difference 1 Note = 0,507 Hkg/ha
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)
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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)
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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
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Thank you
for your attention