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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/
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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
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
POLDER-43/2f
Salinity Dynamics in the Peripheral river of Polder 43/2F
Kharif-2 Rabi Kharif-1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.71
-Mar
-12
1-M
ay-1
2
1-J
ul-
12
1-S
ep-1
2
1-N
ov-
12
1-J
an-1
3
1-M
ar-1
3
1-M
ay-1
3
1-J
ul-
13
1-S
ep-1
3
1-N
ov-
13
1-J
an-1
4
1-M
ar-1
4
1-M
ay-1
4
1-J
ul-
14
Wat
er
Salin
ity
(dS/
m)
Canal Water EC at Bazarkhali, Barguna
Canal Water EC at PSTU, Patuakhali
0.0
0.2
0.4
0.6
0.8
1.0
Wat
er
salin
ity
(dS/
m)
Yield of BRRI dhan28 at Bazarkhali, Barguna and PSTU, Patuakhali
0
2
4
6
8
10
D1=15Nov
D2=20Nov
D3=30Nov
D4=05Dec
D5=15Dec
D6=30Dec
Yie
ld (
t/h
a)
2011-12 Bazarkhali 2012-13 Bazarkhali
2013-14 Bazarkhali 2013-14 PSTU
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
Minimum temperature in Patuakhali during Boro seasons 2011-12 to 2013-14
0
5
10
15
20
25
30
351
-No
v
9-N
ov
17
-No
v
25
-No
v
3-D
ec
11
-Dec
19
-Dec
27
-De
c
4-J
an
12
-Jan
20
-Jan
28
-Jan
5-F
eb
13
-Fe
b
21
-Fe
b
29
-Fe
b
8-M
ar
16
-Mar
24
-Mar
1-A
pr
9-A
pr
17
-Ap
r
25
-Ap
r
Tem
pe
ratu
re (
de
g C
)
Boro 2011-12
Boro 2012-13
Boro 2013-14
D6 D5 D4
D3 D2
D1
POLDER-30
Kharif-2 Rabi Kharif-1
Salinity Dynamics in the Peripheral river of Polder-30
0
5
10
15
20
25
28
-Feb
-12
28
-Ap
r-1
2
28
-Ju
n-1
2
28
-Au
g-1
2
28
-Oct
-12
28
-Dec
-12
28
-Feb
-13
30
-Ap
r-1
3
30
-Ju
n-1
3
31
-Au
g-1
3
31
-Oct
-13
Wat
er
Salin
ity
(dS/
m)
Canal Water EC at Kismatfultola, Khulna
0
3
6
9
12
15
18
21
24
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Riv
er
wa
ter
Sa
lin
ity (
ds/m
)
High tide Low tide
River salinity dynamics in at Batiaghata, Khulna from 1999-2007
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
Yield of BRRI dhan28 at Kismatfultola, Batiaghata, Khulna
0
2
4
6
8
D1=22Oct
D2=01Nov
D3=07Nov
D4=10Nov
D5=15Nov
D6=30Nov
D7=20Dec
Yie
ld (
t/h
a)
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
Yield of BRRI dhan28 at Kismatfultola, Batiaghata, Khulna
-2
0
2
4
6
D1=22Oct
D2=01Nov
D3=07Nov
D4=10Nov
D5=15Nov
D6=30Nov
D7=20Dec
Yie
ld (
t/h
a)
Optimum sowing: 7-15 November
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
Tem
per
atu
re (
deg
C)
Day of Year
2006
2007
D1V1-06
D2V1-06
D1V1-07
D2V1-07
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
Gra
in y
ield
(t/
ha)
Floret fertility (%)
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=22Oct
D2=01Nov
D3=07Nov
D4=10Nov
D5=15Nov
D6=30Nov
D7=20Dec
Gro
wth
Du
rati
on
(d
)
Sowing Date
Minimum temperature in Khulna during Boro seasons 2011-12 to 2013-14.
0
5
10
15
20
25
30
351
-No
v1
1-N
ov
21
-No
v1
-Dec
11
-Dec
21
-Dec
31
-Dec
10
-Jan
20
-Jan
30
-Jan
9-F
eb1
9-F
eb2
9-F
eb1
0-M
ar2
0-M
ar3
0-M
ar9
-Ap
r1
9-A
pr
29
-Ap
r
Te
mp
era
ture
(d
eg
C)
Boro 2011-12
Boro 2012-13
Boro 2013-14
D5 D6 D7
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
Am
ou
nt
of
wat
er
(mm
)
Total water 2005-06 Total water 2006-07
Canal water 2005-06 Canal water 2006-07
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
Wat
er
pro
du
ctiv
ity
(kg/
ha-
mm
)
WPi 2005-06
WPi 2006-07
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.
Thank You