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Selection of Rice Variety through
Farmers Participation:
What it this?
Why we do?
Where will ?
Who will participate? And How?
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What is PVS
Where scientists and farmers directly involves to
identify variety for cultivation in a certain targeted
area.
This can be done in two ways:
Mother Trial, MT
Baby Trial, BT
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Mother Trial,
When a trial conducted in experimental field or in farmersfield but variety selected by the farmers
opinion/participation. (1st year)
10-15 lines can be used
Baby Trial, BT
When few selected lines from the mother trial conducted
in farmers field by farmers management and selected byfarmers.
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Where?
Trial can be set in farmers field or
experimental plot
PVS for certain area
Focus certain problem
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Scientists
Farmers both male and Female
Public Representatives
GO NGO Representatives
Who will participate
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Why PVS?
Farmers directly give their opinion
Local problem preference
Depends on farmers likings Selection for own variety
Easily acceptable
Rapid coverage
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How this can be done?
It can be done by casting vote:Observation
Choose your variety/lines
Cast your voteCount your vote
Result
DiscussionsNext action
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BRRI
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BRRI
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BRRI
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Lines Male Female Total Pre.
Score
+ - + - + -
1
2
3
4
-
15
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BRRI IRRI
BRRI dhan28
BRRI dhan47
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Fig. Performance of the entries, PVS Trial, Satkhira, T. Aman 2010
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Fig. Participation of farmers in voting activities, PVS
Mother trial, Debhata, Satkhira
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PVS-T5
PVS-T2
BR23
BRRI dhan41
Two promising variety for T Aman
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Establishment ofSalinity and
Submergence Tolerance VarietyWhat is Salinity and how salinity grow in
rice field?
* When Na ion present in the soil or water
then we can say thats condition is salinity.
* When it is in a certain range crops can begrown
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* 0.75 ds/m level of water is safe for crops in dry
season.
* Upto 4ds/m salinity in soil crop can grow.
How salinity developed?
Generally sea water is responsible for salinity
But excess evaporation can also cause salinity in
the soil
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salinity affects rice field
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To face these problems what to do
Develop Saline Tolerant Variety
Management practices
Organic matter useuse sweet water (to wash salinity)
Gypsum application (Na ion replace by Ca ion)
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BRRI and IRRI Collaboration
Development of Saline Tolerant Variety
BRRI give emphasis to develop saline tolerantvariety
BRR-IRRI strong collaboration
Screening facilities developed BRRI developed saline tolerant variety for Aus
, Aman, Boro season.
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Saline Tolerant Varieties
Aus/Boro: BRRI dhan55
T Aman: BRRI dhan40, 41, 53 and 54
Boro: BRRI dhan47
Many lines are developed and these are testing
in the farmers field
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Yield Loss due to Soil Salinity
dS/m 5-10 % reduction
6 > dS/m 20-50 % reduction
10 > dS/m optimum
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. Electrical conductivity (ds/m) of water collected from Bakarganj-
Patuakhali- Amtoli-Kalapara.
Location Distance
from sea
Date of sampling
18-Dec 4-Feb 4-Mar 24-Apr
Bakarganj 76 0.40 0.43 0.62 0.42
Lebukhali 72 0.23 0.27 0.36 0.25
Khalishakhali 60 0.23 0.28 0.32 0.12
Shakharia bazar 50 0.2 0.33 0.58 2.43
Amtoli bazar 34 0.26 0.48 0.7 0.89
Sekandarkhali 30 4.79 9.48 14.95 24.60
Kalapara 25 1.00 1.1 1.22 1.59
Andharmanik River 23 8.04 14.5 19.62 11.84
Pakhimara Canal 21 4.31 5.08 4.22 6.13Salimpur 17 2.50 2.84 3.04 3.00
Sonatola River 11 8.12 19.82 26.4 28.70
Bipinpur 8 5.73 7.9 24.1 27.70
Mohipur 6 7.96 19.96 27.9 33.90
Kuakata sea beach 0 8.92 19.08 25.7 28.50
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0
5
10
15
20
25
30
35
0 20 40 60 80
Kuakata
Patharghata
Watersalinity (dS/m) in river/waterbodies located atdifferentdistances from
Kuakataand Patharghatacoasts ofthe Bay of Bengal
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Selection of sites:
Do base line survey
Talk with farmers/local representativesTalk with DAE people (UAO, SAAO)
Consult with SRDI scientist
Then select site
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Experiment set up
Design experiment
Use 3-4 replication
Use bigger plot size (at least 20 msq) Use local and standard check variety
Close monitor
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Flash floods regularly affect rainfed lowland
rice (T.Aman) ecosystems ofBangladesh
where floodwater remains for around two
weeks in many parts of the country.
Flash floods can result in yield losses ofup to
100% depending upon different factors of
submergence prone ecosystem.
What is Submergence?
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Submergence
More than 2.0 mha areas ofBangladesh are
affected by different grades of flash floods
(Iftekharuddaula et al., 2009).
The ecosystem affected by flash floods mainly
constitutes low to medium lowland.
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Screening facilities at BRRI
BRRI developed facilities for screening
submergence tolerance
3 week old seedlings completely submerged
for 2 weeks
Submergence tol. identified
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Survival of Sub1-lines and death of check varieties with 15 days of controlled
submergence, T. Aman 2009, BRRI, Gazipur
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Sl.
No.
Varieties Seedling
height (cm)
Seedling
weight
(gm)
Seedling
strength
(cm)
Final seedling
height (cm)
Elongation
(%)
Survival
(%)
Tolerance
score
Recovery
ability
1 Mukta dhan 36.25 0.20 0.54 40.08 10.59 16.25 7 Poor
2 Cheng Sail 35.40 0.19 0.55 41.33 16.78 17.50 7 Poor
3 Binna Phul 37.25 0.14 0.38 42.63 14.39 15.63 7 Poor
4 Khazar 32.90 0.15 0.44 52.08 58.32 28.75 7 Fair
5 Til Kabur 42.75 0.15 0.36 57.08 33.33 12.50 7 Poor
6 Kalo Joma 50.65 0.13 0.25 52.67 3.99 61.25 5 Good
7 DGI-45 43.30 0.23 0.52 63.50 46.64 43.75 7 Fair
9 DGI-142 36.30 0.26 0.72 65.70 81.09 45.63 7 Fair
10 DGI-155 41.45 0.38 0.92 52.90 27.07 45.63 7 Fair
43 Kolom Depa 57.80 0.17 0.28 64.25 11.95 10.63 7 Poor
44 kajol sail 63.50 0.20 0.31 77.00 21.38 5.00 9 Poor
45 FR13A 38.22 0.36 0.94 54.17 41.86 89.38 3 Very good
46 BR5 28.10 0.14 0.50 58.50 108.24 5.00 9 Poor
LSD (5%) 5.47 0.52 0.09 7.38 18.34 15.77
Survival of Sub1-lines and death of check varieties with 15 days of
controlled submergence, T. Aman 2009, BRRI, Gazipur
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To face these problems what to do
Develop submergence Tolerant Variety
Management practices
Few days after water drain out & clean fieldUse fertilizer
Follow as usual rice cultivation management
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BRRI and IRRI Collaboration
Development of submergence Tolerant Variety
BRRI give emphasis to develop submergencetolerant variety
BRRI-IRRI strong collaboration
BRRI
developed su
bmergence tolerant variety forT.Aman.
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Selection of experimental Field
BRRI dhan33 IR64-Sub1
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Selection of sites:
Do base line survey
Talk with farmers/local representativesTalk with DAE people (UAO, SAAO)
Consult with SRDI scientist
Then select site
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Experiment set up
Desig experiment
Use 3-4 replication
Use bigger plot size (at least 20 msq) Use local and standard check variety
Close monitor
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Performances of Swarna-Sub1 and IR85260-66-654-Gaz 2 (BR11-Sub1-R1)
(left) under 16 days of natural flash flood (right) at Kachir Char, Kurigram, T.
Aman 2009
Table 9b. Performances of Sub1 lines under natural flash flood condition, T. Aman 2010, Borobari, Lalmonirhat
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Table 9b. Performances of Sub1 lines under natural flash flood condition, T. Aman 2010, Borobari, Lalmonirhat
Sl.
No.
Designation Plant
height (cm)
Survival
%
Days to
maturit
y
Yield
(t/h)
1 IR64-Sub1 84.9 96.8 138 3.0
2 Samba Mahsuri-
Sub1
89.2 93.2 153 3.9
3 IR85260-66-1192 95.7 93.2 155 4.1
4 BRRI dhan51(ck) 82.1 95.6 161 4.6
5 BRRI dhan52(ck) 100.7 94.9 159 4.9
6 BRRI dhan33(ck) 95.2 74.2 140 2.5
7 BINA dhan7(ck) 91.7 88.4 141 2.8
8 IR85260-391-
148(ck)
95.8 94.6 163 4.3
D/S: THE 25TH JUNE 2010 D/T: THE 30TH JULY 2010 submerged for 12 days 20 DAT
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