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
BROCCOLI HYBRID PERFORMANCE TRIAL
Richard Greenland, Leonard Besemann and Heidi Eslinger
Table 5. Days to harvest, yield, and some quality characteristics for broccoli
Broccoli usually grows well in North Dakota, but hot days during head initiation can cause problems.
MATERIALS AND METHODS
|
Soil: |
Gardena loam and Embden loam; pH=6.9; 2.3% organic matter; soil-P and soil-K were very high; soil-S was low. |
|
Previous crops: |
2004 - field corn; 2003 - sweet corn; 2002 - pumpkin. |
|
Seedbed preparation: |
Chisel plowed on April 14. Disked on April 19. Multiweeded (field cultivated) twice on April 21 to incorporate fertilizer and herbicide. |
|
Planting: |
Direct seeded broccoli and a barley cover crop (0.45 bu/acre) on April 21 with a Monosem precision planter. Broccoli seeds were placed 1/2 to 3/4 inches deep into a flat, fine seedbed and were spaced 5 3/4 inches apart in 18-inch rows. (about 60,0000 plants/acre). A row of barley was planted between and parallel to the broccoli rows. |
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Plots: |
Main plots were 17 ft long by two rows (3.5 inches) wide. The study had 4 reps. |
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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. |
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Irrigation: |
Overhead sprinkler irrigation as needed |
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Pest Control: |
Weeds were controlled using Treflan (1 pt/acre applied preplant incorporated on April 21), Fusilade + NIS (12 oz/acre + 0.5% v/v on June 8 , which also killed the barley cover crop) and by hand weeding. Sprayed Sevin XLR (1 qt/acre on June 8 and June 16) to control flea beetle. Asana (8 oz/acre on July 1 and August 18), DiPel (1 lb/acre on July 6, July 14, July 20, July 27 and August 10) and Warrior (2.5 oz/acre on August 3) controlled cabbage looper and cabbage worm. |
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Harvest: |
Primary broccoli heads were harvested 10 times from July 26 to September 8. Secondary heads were not harvested. |
Alborada and XBC9512 had the highest yields. Belstar was the best looking overall and was the only one with a consistent domed head, but also had the second highest percentage of hollow stems. Marathon had the lowest overall score and the highest percentage of hollow stems.
Table 5. Days to harvest, yield, and some quality characteristics for broccoli in the Oakes Irrigation Research Site 2005 broccoli hybrid performance trial.
Hybrid |
Seed source1 |
Early stand |
Days to harvest2 |
Harvest spread3 |
Number of heads |
Yield |
Hollow stem |
Leaf penetration4 |
Overall score |
|
|
|
1000s/A |
|
days |
1000s/A |
1000 lb/A |
% |
0 to 3 |
1 to 10 |
|
|
|||||||||
|
Alborada |
BE |
24.5 |
120.9 |
31.3 |
19.2 |
10.0 |
0.0 |
0.0 |
5.8 |
|
Amadeus |
JS |
32.8 |
106.4 |
29.0 |
25.3 |
9.3 |
0.0 |
0.0 |
5.1 |
|
Belstar |
BE |
27.3 |
115.1 |
28.3 |
18.1 |
9.4 |
2.3 |
0.1 |
6.8 |
|
Diplomat |
SK |
29.7 |
111.5 |
23.5 |
22.0 |
9.2 |
1.7 |
0.0 |
6.0 |
|
Marathon |
SK |
29.3 |
123.2 |
23.0 |
15.0 |
9.1 |
7.6 |
0.7 |
4.9 |
|
Tiburon |
BE |
20.3 |
121.4 |
23.3 |
13.5 |
9.4 |
0.0 |
0.0 |
5.4 |
|
XBC9512 |
SK |
32.0 |
116.0 |
24.0 |
20.9 |
10.9 |
0.7 |
0.1 |
5.0 |
|
|
|
|
|
|
|
|
|
|
|
|
Probability >F |
|
0.0004 |
<0.0001 |
0.3 |
<0.0001 |
0.44 |
0.07 |
<0.0001 |
<0.0001 |
|
LSD (0.05) |
|
4.8 |
2.5 |
8.8 |
3.2 |
- |
- |
0.1 |
0.6 |
|
C. V. (%) |
|
12 |
1.4 |
23 |
11 |
13 |
199 |
75 |
7 |
1See Appendix A for seed source codes.
2Average days from planting to harvest.
3Days between first and last harvest.
4Leaf penetration of head: 0=none, 3=heavy.
Go to top of broccoli hybrid
performance trial
Go to Oakes Irrigation Research Site Variety Performance Trials
Go to Oakes Irrigation Research Site crop index
Go to Oakes Irrigation Research Site 2005 Annual Report
Go to Oakes Irrigation Research Site home page