hermetic storage as a solution for prolonged storage of seed
DESCRIPTION
Hermetic Storage as a Solution for Prolonged Storage of Seed . Presentation to Purdue Hermetic Storage Conference April 10-12, 2012 Accra, Ghana. Rule of Harrington (1972). “ Life of seed is halved: a.for each 5 o increase in seed storage temperature - PowerPoint PPT PresentationTRANSCRIPT
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
1.02.03.04.05.06.07.08.09.0
10.011.012.013.014.015.016.017.018.019.020.021.0
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Storage durations, weeks
Oxy
gen
conc
netra
tion,
%
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
umid
ity, %
Ambient HS CRS ACRS CTRL
SEED GERMINATIONSalient Findings
70.00
75.00
80.00
85.00
90.00
95.00
100.00Se
ed g
erm
inat
ion,
%
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
vig
or, %
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
Moi
sture
cont
ent,
%
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
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Data: Research By GrainPro, Philrice and Philmec 2006