By M.K. Mondal, N.K. Saha, A.K.M. Sharifullah, S.P. Ritu, P.L.C. Paul, E. Humphreys, T.P. Tuong, M.A. Rashid Revitalizing the Ganges Coastal Zone Conference 21-23 October 2014, Dhaka, Bangladesh http://waterandfood.org/ganges-conference/

1. Optimum sowing window for boro
rice cultivation in the coastal zone of
Bangladesh
M K Mondal, N K Saha, A K M Sharifullah, S P Ritu,
P L C Paul, E Humphreys, T P Tuong, M A Rashid

2. Patuakhali STU
Polder 43/2F
Polder 30
Andy Nelson
“LOW SALINITY” (L)
•Water “stagnation” 30-50 cm
weeks to months in aman
•River water fresh year-round
•Mild soil salinity in dry season
“MEDIUM SALINITY” (M)
•Water “stagnation” 30-50 cm
weeks to months in aman
•River water saline mid-Feb-Jun
•Medium soil salinity in dry season
2

3. POLDER-43/2f
Salinity Dynamics in the Peripheral river of Polder 43/2F
Kharif-2 Rabi Kharif-1

4. 0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
1-Mar-12
1-May-12
1-Jul-12
1-Sep-12
1-Nov-12
1-Jan-13
1-Mar-13
1-May-13
1-Jul-13
1-Sep-13
1-Nov-13
1-Jan-14
1-Mar-14
1-May-14
1-Jul-14
WaterSalinity(dS/m) Canal Water EC at Bazarkhali, Barguna

5. Canal Water EC at PSTU, Patuakhali
0.0
0.2
0.4
0.6
0.8
1.0
Watersalinity(dS/m)

6. Yield of BRRI dhan28 at Bazarkhali, Barguna and
PSTU, Patuakhali
0
2
4
6
8
10
D1=15
Nov
D2=20
Nov
D3=30
Nov
D4=05
Dec
D5=15
Dec
D6=30
Dec
Yield(t/ha)
2011-12 Bazarkhali 2012-13 Bazarkhali
2013-14 Bazarkhali 2013-14 PSTU

7. Growth duration of BRRI dhan28 at
Bazarkhali, Barguna and PSTU, Patuakhali
y = -2.65x + 143.05
R² = 0.9726
0
40
80
120
160
D1=15 Nov D2=20 Nov D3=30 Nov D4=05 Dec D5=15 Dec D6=30 Dec
Bazarkhali PSTU

8. Minimum temperature in Patuakhali during Boro
seasons 2011-12 to 2013-14
0
5
10
15
20
25
30
35
1-Nov
9-Nov
17-Nov
25-Nov
3-Dec
11-Dec
19-Dec
27-Dec
4-Jan
12-Jan
20-Jan
28-Jan
5-Feb
13-Feb
21-Feb
29-Feb
8-Mar
16-Mar
24-Mar
1-Apr
9-Apr
17-Apr
25-Apr
Temperature(degC)
Boro 2011-12
Boro 2012-13
Boro 2013-14
D6D5D4
D3
D2
D1

9. POLDER-30
Kharif-2 Rabi Kharif-1
Salinity Dynamics in the Peripheral river of Polder-30

10. 0
5
10
15
20
25
28-Feb-12
28-Apr-12
28-Jun-12
28-Aug-12
28-Oct-12
28-Dec-12
28-Feb-13
30-Apr-13
30-Jun-13
31-Aug-13
31-Oct-13
WaterSalinity(dS/m)Canal Water EC at Kismatfultola, Khulna

11. 0
3
6
9
12
15
18
21
24
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
RiverwaterSalinity(ds/m)
High tide Low tide
River salinity dynamics in at Batiaghata, Khulna from 1999-2007

12. Canals and sluice gate in coastal polder
Non-saline river water
conserved in canals
Taking-in non-saline
river water during high
tide through sluice gate

13. Yield of BRRI dhan28 at Kismatfultola,
Batiaghata, Khulna
0
2
4
6
8
D1=22
Oct
D2=01
Nov
D3=07
Nov
D4=10
Nov
D5=15
Nov
D6=30
Nov
D7=20
Dec
Yield(t/ha)
2005-06 2006-07 2011-12 2012-13 2013-14
Cold
injury
at PI
Cold
injury on
seedbed
and TP
Cold
injury
at TP
Cold
injury
at PI

14. Yield of BRRI dhan28 at Kismatfultola,
Batiaghata, Khulna
-2
0
2
4
6
D1=22
Oct
D2=01
Nov
D3=07
Nov
D4=10
Nov
D5=15
Nov
D6=30
Nov
D7=20
Dec
Yield(t/ha)
Optimum sowing: 7-15 November

15. Minimum temperature at panicle initiation (PI) in
Khulna during Boro seasons 2005-06 to 2006-07
0
3
6
9
12
15
18
21
24
27
30
0 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60
Temperature(degC)
Day of Year
2006
2007
D1V1-06
D2V1-06
D1V1-07
D2V1-07

16. Relationship between floret fertility and grain yield of
BRRI dhan28, Boro seasons 2005-06 and 2006-07
R² = 0.8244
0
1
2
3
4
5
6
0 20 40 60 80 100
Grainyield(t/ha)
Floret fertility (%)

17. Growth duration of BRRI dhan28 at Kismatfultola,
Batiaghata, Khulna
y = -2.8571x + 159.21
R² = 0.8093
0
30
60
90
120
150
180
D1=22
Oct
D2=01
Nov
D3=07
Nov
D4=10
Nov
D5=15
Nov
D6=30
Nov
D7=20
Dec
GrowthDuration(d)
Sowing Date

18. Minimum temperature in Khulna during Boro
seasons 2011-12 to 2013-14.
0
5
10
15
20
25
30
35 1-Nov
11-Nov
21-Nov
1-Dec
11-Dec
21-Dec
31-Dec
10-Jan
20-Jan
30-Jan
9-Feb
19-Feb
29-Feb
10-Mar
20-Mar
30-Mar
9-Apr
19-Apr
29-Apr
Temperature(degC)
Boro 2011-12
Boro 2012-13
Boro 2013-14
D5
D6 D7

19. Total and canal water used for boro rice cultivation at
Kismat Fultola, Batiaghata, Khulna during 2005-2007
0
200
400
600
800
D1 = 22 Oct D2 = 01 Nov D3 = 07 Nov D4 = 15 Nov
Amountofwater(mm)
Total water 2005-06 Total water 2006-07
Canal water 2005-06 Canal water 2006-07

20. Irrigation water productivity for boro rice cultivation at
Kismat Fultola, Batiaghata, Khulna during 2005-2007
0
2
4
6
8
10
12
14
D1 = 22 Oct D2 = 01 Nov D3 = 07 Nov D4 = 15 Nov
Waterproductivity(kg/ha-mm)
WPi 2005-06
WPi 2006-07

21. Criteria SC (Barisal) SW (Khulna)
Sowing Period 15 Nov-15 Dec 7-15 Nov
Yield 6-7 t/ha 4-5 t/ha
River water
salinity
< 1 dS/m 2-10 dS/m
Suitability High Marginal, Risky
Conclusion & Recommendation
BORO rice cultivation should be promoted in BARISAL
region of Bangladesh for higher land productivity and
food security.

22. Thank You