Improved aman & boro varieties for the

coastal zone of Bangladesh

Md. Ruhul Amin Sarker

Single low yield (2-3.5 t/ha)

Late maturity (photoperiod sensitive) aman

Much fallow land during dry season

Some low yielding rabi crops

Some Aus areas where fresh water

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30

60

90

120

150

180

24 Jun 15 July 7 Aug

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Sowing date

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24 Jun 15 July 7 Aug

Ma

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Sowing date

5 Dec 9 Dec 9 Dec

Most of Coastal zones

1. Tolerant to water stagnation

2. Tolerant to salinity (e. i. aman-shrimp)

3. Shorter duration (Photoperiod Insensitive) for cropping

system intensification

4. Locally preferred grain type

Need for Coastal Zone (Aman)

BRRI dhan52

Polder-3

Satkhira

HIGHLY

SALINE

Polder-30

Khulna

MODERATELY

SALINE

Study areas in Bangladesh for varietal trials & cropping systems

Polder-43/2F

Patuakhali

VERY SLIGHTLY

SALINE

4

Productivity Improvement in low salt affected areas

(Year-round FRESH water)

Fresh water available < 1 dS/m for year round

Traditional Aman Rice 2 - 3.5 t/ha

Grasspea, chilli, some vegetables in rabi, mostly fallow

Productivity Improvement in Polder 30

(Medium salt affected area)

Water salinity, EC 0.5 - 14 dS/m

Traditional Aman Rice cultivated, water stagnation

Average Yield 2- 3.0 t/ha

Sesame, mungbean and some vegetables in rabi

season others mostly fallow

Scarcity of fresh irrigation water rabi season

10-12 varieties

3 seeding dates (24 June, 15 July and 07 August)

3 cropping seasons (T. Aman 2011, 2012 and 2013)

(Boro 2011-12, 2012-13 and 2013-14)

Farmers’ field

BRRI dhan53

Variety evaluated

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7

Yie

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Variety

Low salinity-Aman

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Varietal trial in Polder43, Bazarkhali, Amtoli, Borguna, Aman

Farmers field, Bazarkhali

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Variety

Medium Salinity-Aman

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Variety

Varietal trial in Polder30, Kismotfultola, Khulna, Aman

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BR11-Saltol BRRIdhan41

BRRIdhan44

BRRIdhan52

BRRIdhan53

BRRIdhan54

BINA dhan8 Local Var.

Yie

ld (

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Variety

Pol-43 Pol-30

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BR11-Saltol BRRI dhan41 BRRI dhan44 BRRI dhan52 BRRI dhan53 BRRI dhan54 BINA dhan8 Local Var.

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Variety

Pol-43 Pol-30

Yield and growth duration (days) comparison between Polder 43 and Polder 30, T. Aman

Participatory varietal selection (PVS)

T. Aman

(Polder-43) BRRI dhan52 (59 farmers; 44 male and 15 female)

BRRI dhan53 (34 farmers; 19 male and 15 female)

Polder-30 BRRI dhan52 and BR11-Saltol (28 farmers, 18 male and 10 female)

BRRI dhan41 (23 farmers; 17 male and 6 female)

BRRI dhan44 (16 farmers; 9 male and 7 female)

PVS activities at Bazarkhali (Polder 43/2/F), Amtoli, Barguna, T. Aman

Different activities of PVS function at Kismatfultola (Polder 30), Bhatiaghata, Khulna, T. Aman

Need for Coastal zones (Boro- for areas where fresh water available)

1. Tolerance to salinity (medium salinity areas)

2. Shorter duration - where fresh water limited (medium salinity areas)

- for intensification to 3 crops/year

3. Locally preferred grain type

4. Cold tolerance

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9

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Low Salinity-Boro

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EC

(d

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Date

EC…

Water Salinity EC (dS/m)

Medium Salinity-Boro

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8

BRRIdhan28

BRRIdhan29

BRRIdhan45

BRRIdhan47

BRRIdhan50

BRRIdhan55

BRRIdhan58

BINAdhan8

BRRIdhan61

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Pol-43 Pol-30

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BRRIdhan28

BRRIdhan29

BRRIdhan45

BRRIdhan47

BRRIdhan50

BRRIdhan55

BRRIdhan58

BINAdhan8

BRRIdhan61

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Variety

Pol-43 Pol-30

Yield and growth duration (days) comparison between Polder 43 and Polder 30, Boro

Varietal trial in Polder43, Bazarkhali, Amtoli, Borguna, Boro

Varietal trial in Polder30, Kismotfultola, Khulna, Boro

Participatory varietal selection (PVS)

Boro

(Polder-43)

BRRI dhan29 (28 farmers; 16 male and 12 female)

BRRI dhan28 (22 farmers; 13 male and 9 female)

BRRI dhan47 (15 farmers; 15 male)

Polder-30 BRRI dhan47 (37 farmers, 23 male and14 female)

BRRI dhan50 and BR7100-R-6-6 (18 farmers; 12 male and 6 female)

BRRI dhan61 (8 farmers; 4 male and 4 female)

PVS activities function at Bazarkhali (Polder 43/2/F), Amtoli, Barguna, Boro2012-13

Different activities of PVS function at Kismotfultila (Polder 30), Batiaghata, Khulna, Boro2012-13.

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FVFM FVIM IVFM IVIM

2.4

3.3

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5.5

Yie

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Variety + Management

Contribution of IV and IM on yield performance

Summary and conclusions

T. Aman:

Growth duration was higher in 1st seeding date (24 June).

Yield was higher in 2nd seeding date (15 July).

BRRI dhan53 (<120 days) produced the highest yield.

BRRI dhan44, 51, 52 and 54, and BR11-Saltol (120-140 days) gave the

highest yield in Polder 43/2/F.

BR11-Saltol, BRRI dhan49, BRRI dhan52 and BRRI dhan54 (120-140

days) produced the highest yield in Polder 30.

Boro: Highest average yield produced by BRRI dhan29 (7.3 t/ha, 162 days)

followed by BRRI dhan47 (6.8 t/ha, 153 days), BRRI dhan61 (6.6 t/ha, 152

days) and BRRI dhan28 (6.0 t/ha, 147 days) in Polder 43/2/F.

In Polder 30, BRRI dhan61 (4.0 t/ha, 150 days) and BRRI dhan47 (4.0

t/ha, 153 days) gave the highest yield followed by BINA dhan8 (3.7 t/ha, 151

days) and BRRI dhan29 (3.7 t/ha, 161 days)

Recommendations

T. Aman: 15 July -the optimum seeding date for both sites

BRRI dhan53 (<120 days) performed the best at both sites, and BINA

dhan8 was suitable for Polder 30.

BR11-Saltol (5.3 t/ha), BRRI dhan52 (4.8 t/ha) and BRRI dhan54 (4.6

t/ha) would be suitable for both areas.

Boro: BRRI dhan47, BRRI dhan61 and BINA dhan8 would be most suitable

for aman-boro systems in Polder 30.

BRRI dhan28, BRRI dhan47 and BRRI dhan61 would be appropriate

for triple rice systems in Polder 43/2/F.

BRRI dhan29 is feasible and would maximize production.

Thank you