Potato seed crop management on processing crop quality & yield - - PowerPoint PPT Presentation

Potato seed crop management on processing crop quality & yield

January 25, 2018 Brandon, MB

Seed Age Trial

• Impact of seed crop management on the subsequent

processing potato crop

• 4 management factors tested, 2 levels of each:

– Planting date – Harvest date – Moisture regime – Storage regime

• All combinations of the 4 factors x 2 levels
• Each run of the trial takes two years to complete

Seed Age – Year 1

• Apply treatments in year 1,

test impact in year 2

• All combinations of the

factors for 16 treatments

Constant Ramp Up Seed from Year 1 Trts Stored at U of M

Seed Age – Year 2

• Year 2 Test Plots

– Randomize and Replicated – Factorial

• 4 main factors

(plant, harvest, moisture, storage)

• All interactions

– All test plots treated equally – Emergence, stems, yield and quality

Plot Map

Plot #: 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 Rep 4 Guard Guard 15 7 14 3 10 9 8 13 2 1 11 16 5 12 4 6 Guard Plot #: 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Rep 3 Guard Guard 3 10 6 1 4 9 8 7 5 11 13 16 2 12 15 14 Guard Guard Plot #: 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Rep 2 Guard Guard 1 11 5 8 14 2 9 15 13 16 3 4 7 12 6 10 Guard Guard Plot #: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Rep 1 Guard Guard 1 16 9 15 14 4 13 11 3 6 2 10 8 7 5 12 Guard Guard

Storage Treatment

10 20 30 40 50 60 70 80 90 100 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 36

2016 Constant 2016 Ramp-Up 2017 Constant 2017 Ramp-Up

Emergence by Storage Treatment

Constant storage Ramp up storage

Constant storage Ramp up storage

LP-EH-IRR-Constant LP-EH-IRR-Ramp Up

How did years compare?

2016 2017 Yield

516 541

Specific Gravity

1.098 1.096

> 6 oz of Mkt

67% 53%

> 12 oz of Mkt

11% 7%

Total Defects

7% 3%

Sugar Ends

0% 0%

Dark Ends

4% 2%

41 68 171 254 228 210 59 39 58 37 100 200 300 400 500 600 700

2016 2017

>12 oz 10-12 oz 6-10 oz 3-6 oz <3 oz

Tuber Number Stems/Plant Gross Yield (no dirt) Total Defects <3 oz 3-6 oz 6-10 oz 10-12 oz >12 oz Main Factors (#000/ac) (cwt/ac) (%) (%) Planting ** ** Early 4.2 7 Late 4.0 9 Harvest Early Late Moisture ** Dryland 4 Irrigated 6 Storage *** *** *** *** *** *** *** Constant 159 3.9 7.8 31.7 40.2 10.3 9.9 Ramp up 182 4.3 10.6 40.7 35.4 6.7 6.6

Seed Age – Years Combined

Seed Age – Size Profile

7.8 10.6 31.7 40.7 40.2 35.4 10.3 6.7 9.9 6.6 0.0 0.2 0.4 0.6 0.8 1.0 Constant Ramp Up >12 oz 10-12 oz 6-10 oz 3-6 oz <3 oz

Summary

• Early planted seed did have more stems and

fewer tubers >12oz

• Storage temperatures had the most significant

impact on processing crop performance

Summary

• Aging of seed by altering storage

temperatures in last month has a significant impact

– Emergence a few days earlier – No impact on yield, BUT – Changed the size profile to smaller tubers

• The constant storage treatment

– Emergence catches up by about 30 DAP – 10% more tubers > 6oz

Thank you! Questions?