Oakes Irrigation Research Site
Carrington Research Extension Center * North Dakota State
University
P.O. Box 531, Oakes, ND 58474-0531, Voice: (701) 742-2189, FAX:
(701) 742-2700, E-mail: Leonard.Besemann@ndsu.edu
'SUPERSWEET' SWEETCORN HYBRID PERFORMANCE TRIAL
Richard Greenland, Leonard Besemann and Heidi Eslinger
Table 31. Harvest data for baby corn in the supersweet baby corn performance trial
Table 32. Baby corn ear characteristics for the supersweet baby corn performance trial
Table 34. Corn development, ear height, ear removal score, and lodging percentages for sweetcorn
Table 36. Ear characteristics of sweetcorn in the supersweet sweetcorn performance trial
Table 37. Husk characteristics of sweetcorn in the supersweet sweetcorn performance trial
Sweetcorn grows very well in this area of North Dakota. The short summer is compensated for by long days and lots of sunshine. In our trials, sweetcorn has always matured before frost. In this trial, in addition to testing sweetcorn harvested at the regular time, we also tested sweetcorn for harvest as baby corn and the effects of harvesting secondary ears as baby corn on the yield of regular sweetcorn.
MATERIALS AND METHODS
|
Soil: |
Embden loam and Maddock sandy loam; pH=6.7; 2.8% organic matter; soil-P and soil-K was very high; soil-S was low. |
|
Previous crops: |
2004 - mustard and field corn; 2003 - pepper, tomato and onion; 2002 - soybean. |
|
Seedbed preparation: |
Chisel plow on April 14. Disked April 19. Multiweeded (field cultivated) once on May 17 to smooth the seed bed and to incorporate fertilizer. |
|
Planting: |
Seeded on May 17 in 30-inch rows. Planting depth was about 1 inch. Seeding rate was 35,000 seeds/acre. Stand was later thinned to 25,000 plants/acre. |
|
Plots: |
Plots were 30 ft (12 rows) wide by 17 ft long. There were 4 reps. |
|
Fertilizer: |
On April 15, broadcast 26 lbs N/acre and 30 lbs S/acre as 21-0-0-24. Fertigate 40 lbs N/acre on June 18 and 50 lbs N/acre on July 7 as 28-0-0. Knifed in 90 lbs N/acre as 28-0-0 + Agrotain (2.4 qt/ton of N) on July 2. |
|
Irrigation: |
Overhead sprinkler irrigation as needed. |
|
Pest Control: |
AAtrex 9-O + Outlook (0.5 lb ai/acre + 1pt/acre on May 18), cultivation (June 23), and hand weeding controlled weeds. Applied Dipel (1 lb/acre on July 6) to control European corn borer and corn earworm. |
|
Harvest: |
Secondary ears from one of the two center rows from each plot were harvested as baby corn from July 18 to July 26 (at a growth stage of initial silking to 2 days after silking). Primary ears and secondary ears of marketable size from both of the two center rows were hand harvested Aug 5 to Aug 15, which was 23 to 28 days after half-silk date. |
Table 31. Harvest
data for baby corn in the Oakes Irrigation Research Site 2005
supersweet baby corn performance trial.
Hybrid |
Seed source1 |
Days to harvest |
Harvest spread2 |
Number of ears |
Yield |
||
|
unhusked |
husked |
unhusked |
husked |
||||
|
|
days |
days |
---- 1000s per acre --- |
---------- lbs/acre -------- |
|||
|
|
|||||||
|
Double Up |
RG |
64 |
5 |
16.9 |
15.4 |
2788 |
466 |
|
Fantastic |
SW |
66 |
7 |
18.4 |
14.9 |
3028 |
453 |
|
WSS 0987 VP |
RG |
67 |
6 |
24.6 |
19.2 |
4353 |
451 |
|
|
|||||||
|
Probability |
0.011 |
0.17 |
0.02 |
0.07 |
0.0009 |
0.95 |
|
|
LSD (0.05) |
2 |
-- |
4.8 |
-- |
553 |
-- |
|
|
C.V. (%) |
2 |
29 |
14 |
14 |
9 |
16 |
|
1See Appendix A for a list of seed sources.
2Days
from first harvest to
last harvest.
Go to top of supersweet sweetcorn
hybrid performance trial report
Table 32. Baby corn ear characteristics for the
2005 Oakes Irrigation Research Site
supersweet baby corn performance trial.
Hybrid |
Seed source1 |
Ear weight unhusked |
Ear husked |
Ear length |
diameter |
Appearance |
Overall |
|
|
----- ounces/ear ------ |
--------- inches -------- |
1 to 5 |
1 to 10 |
|||
|
|
|||||||
|
Double Up |
RG |
2.6 |
0.49 |
4.3 |
0.62 |
3.8 |
7.4 |
|
Fantastic |
SW |
2.7 |
0.49 |
4.1 |
0.62 |
3.4 |
7.2 |
|
WSS 0987 VP |
RG |
2.8 |
0.37 |
3.7 |
0.57 |
3.1 |
7.2 |
|
|
|||||||
|
Probability |
0.5 |
0.02 |
0.04 |
0.24 |
0.003 |
0.79 |
|
|
LSD (0.05) |
-- |
0.08 |
0.5 |
-- |
0.3 |
-- |
|
|
C.V. (%) |
9 |
10 |
7 |
7 |
5 |
5 |
|
1See
Appendix A
for a list of seed
sources.
Table 33. Effects of secondary ear removal for
baby corn on number of ears per acre and yield of sweetcorn in the
Oakes Irrigation
Research
Site 2005 supersweet sweetcorn performance trial.
Treatment |
Unhusked |
Husked |
||||||
|
marketable |
total |
marketable |
total |
|||||
|
ears |
yield |
ears |
yield |
ears |
yield |
ears |
yield |
|
|
|
1000s/A |
tons/A |
1000s/A |
tons/A |
1000s/A |
tons/A |
1000s/A |
tons/A |
|
|
||||||||
|
Secondary ears removed |
22.5 |
9.0 |
23.6 |
9.2 |
21.4 |
6.0 |
23.6 |
6.4 |
|
Secondary ears not removed |
28.3 |
10.3 |
29.6 |
10.6 |
25.9 |
6.6 |
29.4 |
7.1 |
|
|
|
|
|
|
|
|
|
|
|
Probability for treatment |
0.0013 |
0.007 |
0.0005 |
0.002 |
0.003 |
0.23 |
0.0006 |
0.11 |
|
Probability of interaction |
0.0016 |
0.03 |
0.0005 |
0.01 |
0.0004 |
0.08 |
0.0004 |
0.06 |
|
C.V. (%) |
12 |
9 |
10 |
8 |
12 |
16 |
10 |
14 |
Go to top of supersweet sweetcorn
hybrid performance trial report
Table 34. Corn
development, ear height, ear removal score, and lodging percentages for
sweetcorn in the Oakes Irrigation
Research
Site 2005 supersweet sweetcorn performance trial.
Hybrid |
Seed source1 |
Early stand2 |
Days to half-silk |
Days to harvest |
Ear height3 |
Ease of ear removal4 |
Lodging |
|
|
1000s/acre |
|
|
inches |
1 to 10 |
% |
|
|
|
|||||||
|
Double Up |
RG |
26.6 |
62 |
83 |
23.5 |
6.6 |
0.0 |
|
Fantastic |
SW |
29.2 |
62 |
83 |
22.8 |
5.9 |
35.0 |
|
WSS 0987 VP |
RG |
33.3 |
65 |
87 |
32.5 |
6.0 |
7.5 |
|
|
|||||||
|
Probability |
0.02 |
0.002 |
0.002 |
<0.0001 |
0.14 |
0.095 |
|
|
LSD (0.05) |
3.9 |
1 |
2 |
2.2 |
-- |
-- |
|
|
C.V. % |
8 |
1.3 |
1 |
5 |
8 |
138 |
|
1See Appendix A for a list of seed sources.
2Corn was over planted. After stand count, corn was thinned to about 28,000 plants/acre.
3Distance from ground to base of ear.
4The higher the score, the easier it was to remove the ear.
Go to top of supersweet sweetcorn
hybrid performance trial report
Table 35. Number
of ears per acre and yield of sweetcorn in the Oakes Irrigation
Research Site 2005 supersweet sweetcorn performance trial.
Hybrid |
Seed source1 |
Unhusked |
Husked |
||||||
|
marketable |
total |
marketable |
total |
||||||
|
ears |
yield |
ears |
yield |
ears |
yield |
ears |
yield |
||
|
|
1000s/A |
tons/A |
1000s/A |
tons/A |
1000s/A |
tons/A |
1000s/A |
tons/A |
|
|
|
|||||||||
|
Double Up |
RG |
22.8 |
10.0 |
24.1 |
10.3 |
18.7 |
6.1 |
23.3 |
6.9 |
|
Fantastic |
SW |
24.1 |
9.9 |
25.4 |
10.2 |
23.1 |
6.8 |
25.4 |
7.2 |
|
WSS 0987 VP |
RG |
37.9 |
10.9 |
39.5 |
11.2 |
35.9 |
6.8 |
39.5 |
7.2 |
|
|
|||||||||
|
Probability |
0.0008 |
0.3 |
0.0004 |
0.35 |
0.0003 |
0.18 |
0.0002 |
0.71 |
|
|
LSD (0.05) |
5.4 |
-- |
4.8 |
-- |
4.7 |
-- |
4.4 |
-- |
|
|
C.V. (%) |
11 |
9 |
9 |
9 |
10 |
8 |
9 |
8 |
|
1See
Appendix A
for a list of seed
sources.
Go to top of supersweet sweetcorn
hybrid performance trial report
Table 36. Ear characteristics of sweetcorn in the
Oakes Irrigation Research Site 2005
supersweet sweetcorn performance trial.
Hybrid |
Seed source1 |
Ear length |
Ear diameter |
Average rows of kernels |
Tip unfilled |
Brix score2 |
Kernel color |
Kernel yellow intensity3 |
Ear overall score |
|
|
-------- inches ------- |
|
inches |
|
|
1 to 3 |
1 to 10 |
||
|
|
|||||||||
|
Double Up |
RG |
8.8 |
1.92 |
15.5 |
0 |
16.4 |
bi |
2.5 |
8.6 |
|
Fantastic |
SW |
8.0 |
1.93 |
17.5 |
0 |
16.9 |
bi |
2.5 |
8.4 |
|
WSS 0987 VP |
RG |
7.6 |
1.60 |
15.0 |
0 |
16.0 |
w |
-- |
8.3 |
|
|
|||||||||
|
Probability |
0.0011 |
0.0003 |
0.27 |
-- |
0.83 |
|
-- |
0.56 |
|
|
LSD (0.05) |
0.4 |
0.10 |
-- |
-- |
-- |
-- |
-- |
||
|
C.V. (%) |
3 |
3 |
13 |
-- |
12 |
0 |
6 |
||
1See Appendix A for a list of seed sources.
2The Brix score is a measure of the soluble solids and is usually related to sweetness - higher Brix equals sweeter.
3Gives
darkness of yellow
kernels on ear. 1 = light yellow; 2 = medium yellow; 3 = dark yellow.
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hybrid performance trial report
Table 37. Husk characteristics of sweetcorn in the Oakes Irrigation Research Site 2005 supersweet sweetcorn performance trial.
Hybrid |
Seed source1 |
Husk color2 |
Distance husk over tip3 |
Husk tight- ness4 |
Percent short shank |
Husk overall score |
|
|
1 to 3 |
inches |
1 to 3 |
% |
1 to 10 |
|
|
|
||||||
|
Double Up |
RG |
2.0 |
0.9 |
1.4 |
100 |
6.9 |
|
Fantastic |
SW |
2.0 |
0.9 |
2.3 |
91 |
7.1 |
|
WSS 0987 VP |
RG |
2.0 |
2.1 |
2.5 |
85 |
7.4 |
|
|
||||||
|
Probability |
-- |
0.009 |
0.002 |
0.03 |
0.24 |
|
|
LSD (0.05) |
-- |
0.7 |
0.4 |
10 |
-- |
|
|
C.V. (%) |
0 |
31 |
12 |
7 |
5 |
|
1See Appendix A for a list of seed sources.
2Color of husk. 1 to 3 is light to dark green.
3The distance the husk extends beyond the end of the ear.
4How
tight husk is around ear.
1 = loose; 3 = tight.
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hybrid performance trial report
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