pvs training

8/6/2019 PVS Training

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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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