hermetic storage as a solution for prolonged storage of seed presentation to purdue hermetic storage...

Hermetic Storage as a Solution for Prolonged Storage of Seed Presentation to Purdue Hermetic Storage ConferenceApril 10-12, 2012 Accra, Ghana

Rule of Harrington (1972)

“ Life of seed is halved:

a.for each 5o increase in seed storage temperature

b. for each 1% increase in seed moisture content “

“…rice seeds held in airtight storage outlive seeds held in open storage provided they are adequately dried before they are placed in airtight storage …..Rice seeds dried by high heat before sealing were dead after 26 to 28 years, but seeds dried by the sun to 11-13 % MC were stored safely for 30 years”

(Kondo and Okumura, Japan 1930-1932)

STORAGE METHODSMethodology

Plastic material : Polyvinyl chloride

Capacity : 7.5 cu m

Dimension : 2.95x 1.70 x 1.5m

Thickness : 0.80 – 0.85mm

Color : White

Fabrication : HF weldedHermetic storage

BUILDING OF EXPERIMENTAL PILESMethodology

GrainPro Cocoon

Weighing

Bottom section Loading/piling Height capacity

Top section Zipper keys Complete set-up

OXYGEN CONCENTRATIONSalient Findings

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

12.0

13.0

14.0

15.0

16.0

17.0

18.0

19.0

20.0

21.0

1 2 3 4 5 6 7 8 9 101112131415161718192021222324252627282930313233343536

Storage durations, weeks

Oxygen concn

etration, %

Cocoon1 Cocoon2 Cocoon3

Salient Findings

TEMPERATURE

10.0

12.0

14.0

16.0

18.0

20.0

22.0

24.0

26.0

28.0

30.0

32.0

34.0

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Storage duration, weeks

Tem

pera

ture

, °C

Ambient HS CRS ACRS CTRL

RELATIVE HUMIDITYSalient Findings

40.0

45.0

50.0

55.0

60.0

65.0

70.0

75.0

80.0

85.0

90.0

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Storage duration, weeks

Rela

tive h

um

idity, %

Ambient HS CRS ACRS CTRL

SEED GERMINATIONSalient Findings

70.00

75.00

80.00

85.00

90.00

95.00

100.00

Seed g

erm

ination, %

HS 96.16 96.47 93.30 86.15

CRS 96.80 97.57 92.95 89.60

ACRS 94.30 94.75 88.13 85.82

CTRL 92.87 92.92 76.38 74.70

0 Month 3 Months 6 Months 9 Months

SEED VIGORSalient Findings

35.00

40.00

45.00

50.00

55.00

60.00

65.00

70.00

75.00

80.00

85.00

90.00

95.00

100.00

Seed v

igor, %

HS 93.40 66.00 77.92 68.20

CRS 94.05 70.90 75.85 67.55

ACRS 92.75 66.30 68.92 63.95

CTRL 90.98 40.13 38.45 36.43

0 Month 3 Months 6 Months 9 Months

MOISTURE CONTENTSalient Findings

9.00

9.20

9.40

9.60

9.80

10.00

10.20

10.40

10.60

10.80

11.00

Mois

ture

conte

nt, %

HS 10.10 10.92 10.66 10.42

CRS 10.45 10.86 10.60 10.39

ACRS 10.18 9.81 9.91 9.52

CTRL 9.55 9.83 10.21 10.18

0 Month 3 Months 6 Months 9 Months

Summarizing

Under HS conditions germination can be preserved for long time. Longest track record is 14 months

HS performs better than AC storage and almost as good as cold storage

Seed vigor is kept high

Findings of trials with other GrainPro products as SuperGrainbags, GrainSafes show same results as GrainPro Cocoons

Results with maize, sorghum, soybeans are similar

THANK YOU !

GrainPro Inc 200 Baker Ave, Suite 309, Concord MA 01742, USATel.+1-978-371-7118 Fax +1-978-371-7411 sales@grainpro.com

GrainPro Philippines Inc : Subic Bay Gateway Park salesasia@grainpro.com Tel.+63-47-2527884 Fax +63-47-2527885

www.grainpro.com

Data: Research By GrainPro, Philrice and Philmec 2006