by Elizabeth Humphreys, Manoranjan Mondal. At Ganges Regional Research Workshop of the Challenge Program on Water and Food/Water Land and Ecosystems (CPWF/WLE), May 2014
2. 2
Take home messages
1. Tremendous potential to greatly increase productivity, nutritive
value, profitability & resilience of production systems in the
polders
• agricultural systems (rice & non-rice)
• aquacultural systems
• rice-aquaculture systems
• homestead production systems
2. To unlock this potential need to invest in
• improved water mgt
• with special emphasis on drainage mgt (the entry point)
and infrastructure inside the polders
3. Community co-ordination is critical to achieving this – needs
community ownership & to be community-driven
3. West Bengal, India
SW& SC Bangladesh
Patuakhali STU
Polder 43/2/F
Polder 30
Polder 3
North 24 Parganas
South 24 Parganas
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
“HIGH SALINITY” (H)
•Water “stagnation” 30-50 cm
weeks to months in aman
•River water saline Dec-Jul
•High soil salinity in dry
season
3
4. Objectives (6)
1. Rice variety evaluation
• aus (early rainy season) – low (L), medium (M) salinity
• aman (main rainy season) - L, M, high (H) salinity
• boro (dry season) - L, M
2. Rice-based cropping system intensification
• Rice-rice-rice L rice-rice M
• Rice-rice-rabi L rice-rabi M
• Rice+fish - brackish water aquaculture H
3. Homestead production systems – L, M, H
• Analysis - literature review & surveys
• Improving productivity of homestead systems/empowering
women
4. Brackish water aquaculture systems - H
• Evaluation of improved management options
5. Technology & policy recommendations
6. Pilot community water management – CPWF Innovation Grant 4
8. 8
Liz 1. Improving rice–based agricultural cropping
systems
Saha
Ashutosh
2. Improving rice-aquaculture & aquaculture only
systems
Manjurul 3. Homestead production systems
- cross-country comparison
Kabir - women-led participatory action research
Today’s presentation
9. Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
Traditional Rice
2-3.5 t/ha
Predominant agricultural cropping systems in the
low & moderately saline regions of the coastal zone of Bangladesh
..................Fallow…………………........ Low
Med
~40%
• Traditional variety
• Tall, photoperiod sensitive (late maturing – harvested Dec/Jan)
• 35-70 day old seedlings 9
10. Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
Traditional Rice
2-3.5 t/ha
Traditional Rice
2-3.5 t/ha
Sesame
0-1 t/haTraditional Rice
2-3.5 t/ha
Predominant agricultural cropping systems in the
low & moderately saline regions of the coastal zone of Bangladesh
Khesari
0.2-1 t/ha ............Fallow…………….
…..Fallow.... ....……........
..................Fallow…………………........ Low
Med
Med
Low
~40%
10
11. Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
Traditional Rice
2-3.5 t/ha
Traditional Rice
2-3.5 t/ha
Sesame
0-1 t/haTraditional Rice
2-3.5 t/ha
Predominant agricultural cropping systems in the
low & moderately saline regions of the coastal zone of Bangladesh
Khesari
0.2-1 t/ha ............Fallow…………….
…..Fallow.... ....……........
..................Fallow…………………........ Low
Med
Med
Low
~40%
Traditional Rice
2-3.5 t/ha
Aus
3-4 t/ha............Fallow……………...
Low
11
12. 12
For high rice yield & cropping system intensification
in polders we need rice varieties with…..
1. High yield potential
2. Tolerance to stresses, especially
• water stagnation (30-50 cm, week...months)
• salinity
• submergence after transplanting
• singly and in combination
3. Early maturity (for system intensification)
4. Preferred grain quality
14. Tolerance to water
stagnation for aman
essential throughout coastal
zone
This crop experienced deep
water (up to 44 cm) for
several weeks (4.6 t/ha)
14
BRRI dhan54
16. Submergence tolerance needed for aman (& aus)
(example in a shrimp-rice gher)
2nd transplanting submerged for 1 week shortly after
transplanting – BRRI dhan52 (BR11-Sub1)
16
3rd transplanting NOT submerged
18. Salinity tolerance needed for aman in high salinity areas
(& for aus)
- especially for aman in ghers used for brackish water shrimp in the dry
season
18
BRRI dhan47 in gher
3.6 t/ha
BRRI dhan28
BRRI dhan61
3.8 t/ha
BRRI dhan28
BRRI dhan47 4 t/ha
Parijat <1 t/ha
20. Boro (140-145 d)T. Aman (130-140 d)Aus (100-105 d)
20
Cropping system intensification for low salinity areas
1. Aus-aman-boro (15-17 t/ha)
HYV
Short duration
Salt tolerant
HYV
Medium duration
Water stagnation tolerant
HYV
Medium duration
“Early” sowing
Successfully implemented on-farm for 3 years – 8th crop – polder 43/2F
A M J J A S O N D J F M A
21. Rabi (110-140 d)
T. Aman (130-140 d)Aus (100-105 d)
A M J J A S O N D J F M A
21
Cropping system intensification for low salinity areas
2. Aus-aman-rabi (9-10 t/ha rice+9 t/ha maize OR 3.5 t/ha sunflower etc)
HYV
Short duration
Salt tolerant
HYV
Medium duration
Water stagnation tolerant
HYV
Maize
Sunflower,
Water melon
Chilli etc.
Successfully implemented on-farm for 3 years – 8th crop – polder 43/2F
22. Boro (140-145 d)T. Aman (130-140 d)
22
Cropping system intensification for medium salinity/water short areas
1. Aman-boro (~10 t/ha)
HYV
Medium duration
Water stagnation tolerant
HYV
“Early” sowing
Medium duration
Successfully implemented on-farm for 3 years, 6th crop – polder 30
A M J J A S O N D J F M A
23. Rabi (110-140 d)T. Aman (130-140 d)
A M J J A S O N D J F M A
23
Cropping system intensification for medium salinity areas
2. Aman-rabi (~4.5 t/ha rice + ~5 t/ha maize, 1.5 t/ha sunflower)
HYV
Maize
Sunflower
Sesame
Implemented on-farm for 2 years, 4th crop –
polder 30 – but NOT to potential;
Community water management, cropping
system synchronisation, adoption challenges
24. 24
With improved varieties & cropping system intensification,
productivity can be increased 2 to several-fold
Widespread implementation requires
improved water management
25. Water mgt ingredients for a Green Revolution in the Polders
1. Separation of lands of higher & lower
elevation (mini-water mgt units)
Prevent accumulation of drainage in
lowlands – enable rainy season HYVrice
25
29. Water mgt ingredients for a Green Revolution in the Polders
1. Separation of lands of higher & lower
elevation (mini-water mgt units)
Prevent accumulation of drainage in
lowlands – enable rainy season HYVrice
2. Strategic drainage during the rainy
season
Enables cultivation of HYV & thus
earlier harvest (mid-Nov)
29
30. Water mgt ingredients for a Green Revolution in the Polders
1. Separation of lands of higher & lower
elevation (mini-water mgt units)
Prevent accumulation of drainage in
lowlands – enable rainy season HYVrice
2. Strategic drainage during the rainy
season
Enables cultivation of HYV & earlier
harvest (mid-Nov)
3. Drainage shortly before aman harvest
(early Nov)
Enables soil to dry for early (timely)
establishment of rabi crops
30
31. Sesame
Mungbean
The consequences of late rabi crop establishment
– low yields or complete failure due to early kharif rains
- high yield, high value crops out of the question (e.g. sunflower, maize)
AFTER RICE HARVEST – some areas
Low input crops – late sown (Feb/Mar) because of late rice harvest
31
32. Water mgt ingredients for a Green Revolution in the Polders
1. Separation of lands of higher & lower
elevation (mini-water mgt units)
Prevent accumulation of drainage in
lowlands – enable rainy season HYVrice
2. Strategic drainage during the rainy
season
Enables cultivation of HYV & earlier
harvest (mid-Nov)
3. Drainage shortly before aman harvest
(early Nov)
Enables soil to dry for early (timely)
establishment of rabi crops
4. Make use of available fresh water for
irrigation during the dry season
In some areas lots of fresh water in the
rivers almost year-round - untapped
32
0.00
4.00
8.00
12.00
16.00
7-Apr-11
6-Jun-11
-Aug-11
4-Oct-11
-Dec-11
-Feb-12
1-Apr-12
0-Jun-12
-Aug-12
8-Oct-12
-Dec-12
-Feb-13
6-Apr-13
5-Jun-13
-Aug-13
Salinity(ppt)
Polder 30 (Station-2, Pussur river)
0.0
4.0
8.0
12.0
16.0
20.0
24.0
26-Feb
6-Jun
14-Sep
23-Dec
1-Apr
10-Jul
18-Oct
26-Jan
6-May
14-Aug
22-Nov
2-Mar
Salinity(ppt)
Date
Polder 43-2f (Station-2 (Out Side),Paira River)
IWM
33. Water mgt ingredients for a Green Revolution in the Polders
1. Separation of lands of higher & lower
elevation (mini-water mgt units)
Prevent accumulation of drainage in
lowlands – enable rainy season HYVrice
2. Strategic drainage during the rainy
season
Enables cultivation of HYV & earlier
harvest (mid-Nov)
3. Drainage shortly before aman harvest
(early Nov)
Enables soil to dry for early (timely)
establishment of rabi crops
4. Make use of available fresh water for
irrigation during the dry season
In some areas lots of fresh water in the
rivers almost year-round - untapped
5. De-silting of khals ..Increases storage capacity for irrigation
when river too saline
..Facilitates drainage
33
34. Khals within polders vary greatly in size, can store fresh water during the dry
season, but often heavily silted up (some no longer exist), blocked…
34
35. Water mgt ingredients for a Green Revolution in the Polders
1. Separation of lands of higher & lower
elevation (mini-water mgt units)
Prevent accumulation of drainage in
lowlands – enable rainy season HYVrice
2. Strategic drainage during the rainy
season
Enables cultivation of HYV & earlier
harvest (mid-Nov)
3. Drainage shortly before aman harvest
(early Nov)
Enables soil to dry for early (timely)
establishment of rabi crops
4. Make use of available fresh water for
irrigation during the dry season
In some areas lots of fresh water in the
rivers almost year-round - untapped
5. De-silting of khals ..Increases storage capacity for irrigation
when river too saline
..Facilitates drainage
6. “Early” establishment of boro rice
after aman
(sow mid-Nov)
Reduces storage requirement for fresh
water to finish the crop off after the
rivers become too saline
35
Polder 30 - sufficient storage for 15-20% of land to grow boro rice
- desilting of khals roughly double the possible boro rice area
36. Water mgt ingredients for a Green Revolution in the Polders
1. Separation of lands of higher & lower
elevation (mini-water mgt units)
Prevent accumulation of drainage in
lowlands – enable rainy season HYVrice
2. Strategic drainage during the rainy
season
Enables cultivation of HYV & earlier
harvest (mid-Nov)
3. Drainage shortly before aman harvest
(early Nov)
Enables soil to dry for early (timely)
establishment of rabi crops
4. Make use of available fresh water for
irrigation during the dry season
In some areas lots of fresh water in the
rivers almost year-round - untapped
5. De-silting of khals
(CPWF phase 1)
..Increases storage capacity for irrigation
when river too saline
..Facilitates drainage
6. “Early” establishment of boro rice after
aman
(sow mid-Nov – CPWF phase 1)
Reduces storage requirement for fresh
water to finish the crop off after the
rivers become too saline
7. High yielding/value rabi crops in the
dry season, espec. in water short areas
Only need 2-3 irrigations
36
39. BANGLADESH
Aquaculture: Salinity fluctuates from
high in dry season to medium in
rainy season
Aquaculture-rice: Salinity fluctuates from
high in dry season to low in rainy season
39
40. Research Objective
Improved management for enhanced productivity, profitability &
resilience in aquaculture-rice & aquaculture only systems
24 mini-ghers for aquaculture-rice 12 mini-ghers for aquaculture only
407-870 m2
866-1463 m2
Trenches for fish refuge
when water shallow for
rice establishment
40
43. Aquaculture treatments (4 reps)
Treatments
Culture
patterns
2012 2013
Cycle 1 Cycle 2
Cycle 3
(+rice)
Cycle 1 Cycle 2
Cycle 3
(+rice)
Farmer’s
practice
Poly
Shrimp + different sp of fish
(multiple stocking &
harvesting)
Shrimp + different sp of fish
(multiple stocking &
harvesting)
Improved
practice 1
Mono Shrimp Tilapia
Prawn
Prawn
Shrimp Shrimp
Tengra
………………
Tilapia
Improved
practice 2 Poly
Shrimp
Tilapia
Tilapia
Tengra
Prawn
Singh
Prawn
Singh
Shrimp
Tilapia
Shrimp
Tilapia
Tilapia
Tengra
………………
Rohu
Singh
Magur
Managed by farmers
43
Managedbyresearchers
44. Management
Practice Farmer’s Practice Improved 1 & 2
Liming 200 kg ha-1 200 kg ha-1
Water filtering Unfiltered Filtered
Predatory Fish Not eradicated Eradicated
Disinfection No disinfection Disinfected
Fertilization No fertilizer Fertilizer & dolomite
Shrimp seed Not PCR tested PCR tested
Feed No feed Feeding
Water replenishment When needed When needed
Post stocking fertilization Very insufficient When primary
production is low
Fish seed Some wild All from hatcheries
44
45. Timeline
Shrimp
& fish
Stocking 1
Harvest 3
AprilMarch Aug. Dec.
Harvest 2
Sept.
Stocking 3 &
rice
transplanting
Harvest 1 &
Stocking 2
June July Nov.May Oct.
Dry season Wet season
Shrimp
diseases
45
46. Rice-aquaculture system
Therefore 2 water depth treatments (low & high) in rice-aquaculture
Saline water needs to be drained in July to allow leaching of salt by
rainfall prior to rice transplanting
Brackish water aquaculture production is higher if saline water is
kept for longer
Need shallow water after transplanting rice (<20 cm)
This is very shallow for aquaculture (importance of trenches)
Better rice productivity with shallower water
Better aquaculture productivity with deeper water
Some tradeoffs for rice & aquaculture system
46
48. Aquaculture production
LD – low depth
HD – high depth
0
500
1000
1500
2000
2500
3000
Farmer's practice Monoculture Polyculture
Yield(kgha-1)
Culture patterns
Shrimp (LD)
Fish (LD)
Shrimp (HD)
Fish (HD)
2013
Changed to lower
growth but higher
value fish species
0
500
1000
1500
2000
2500
3000
3500
4000
Farmer's practice Monoculture Polyculture
Yield(kgha-1)
Culture patterns
Shrimp (LD)
Fish (LD)
Shrimp (HD)
Fish (HD)
2012
48
51. Production of Aman Rice
0
500
1000
1500
2000
2500
3000
3500
BR11 BR47 BR54 Morichshail Kumri Jotai
Yield(kg/ka)
2012 2013
High yielding varieties Local varieties
51
52. September – drainage congestion in whole region
after heavy rain due to inadequate water conveyance
system (drainage)
October – water shortage - plenty of freshwater in
river but inadequate conveyance system (irrigation) 52
58. Key challenges
Markets
• Scarcity of quality shrimp and fish seed
• Lack of quality feed in local market
Aquaculture management
• Prevention of escaping cat fish through dikes
• Aquatic weed control
Community
• Poor canal network for filling ponds & drainage
(need community system)
• Poaching risk increases (need to increase
productivity of all ghers to lessen predation of
individual ghers)
58
62. Take home messages
Farmer practice very low profit
Improved practice increases profit 3-5 times
Shrimp monoculture can be profitable, but highly risky
Polyculture provides resilience against failure of
shrimp – profitable even if ALL shrimp die
We failed to get high yields of rice because of inability
to drain (& irrigate) when needed
Need good community water management systems for
both aquaculture and rice – for intake and drainage as
needed
Neighbouring farmers are beginning to adopt
improved practices
62
66. Rainy season rice - dry season rice with fish
(across both seasons)
The cropping system
More productive, profitable & sustainable
paddy cum fish culture systems
Goal
66
67. Kakdwip Block: Vill – Shibkalinagar
Namkhana Block: Vill- Madanganj
Experimental site
67
68. Objectives
To evaluate the effect of pond area/land area ratio on system
performance
20%
30%
i.e. How big does the pond need to be to support dry season
rice?
To evaluate the impact of harvesting method
Single harvest
Phased harvest
3 replicates, split plot
68
70. PaddyVariety
Partition of pond and paddy field by Net and Bamboo
Fish Culture
without phase harvest
Fish Culture
with phase harvest
Earthen Embankment
TrenchPond area
(30% or 20%)
Paddy Cultivation Area
(70% or 80%)
Layout
70
72. Fish management
Species
3 spp Indian Major Carp
Advance Fingerlings @ 4000/ha
(Catla:Rohu:Mrigal 30:35:35),
Scampi-@1500/ha
Feed management
Broadcasting and tray feeding
Feed
Pelleted feed
(protein-24%, lipid 4%) @ 5-3% of body weight)
72
73. Rice culture
Varieties
Wet season - Amalmana
Dry season –
Lalminikit (WGL 20471)
BINA-8
Fertilizer
Recommended practice
Irrigation of dry season rice
From pond using a pump
Cultivation of wet season
paddy variety
Cultivation of dry season
paddy variety 73
74. 20% pond area - higher nitrate and phosphate in water
greater production of plankton (= fish food!)
74
75. 0
100
200
300
400
500
600
700
800
900
1000
30% land
shaping
20% land
shaping
Production(kg/ha) Production of fish
0
200
400
600
800
1000
1200
Without phase
harvest
With phase
harvestProduction(kg/ha)
Productivity 20% pond higher by 161 kg/ha
– due to higher nutrient concentration?
Productivity phased harvest higher by 277 kg/ha
- due to progressive removal of larger fish
75
76. 0
20
40
60
80
100
120
140
160
Rohu Catla Mrigal Scampi
Meanbodyweight(g)
30%
pond
20%
pond
Performance of individual species
Higher growth of 3 carp species in 20%
Lower growth of scampi in 20%
Sampling of fish
76
77. Paddy production (wet season)
Paddy harvesting and threshing
Greater lodging
from cyclone
77
78. Dyke cropping
Dyke crops Production (kg)/ha
land of PCF
Gross income
(Rs)/ha land of PCF
Vegetables 351 11,706
Oil seed 169 2,400
Fodder (seed) 458 5,490
Dyke cropping in Paddy cum fish culture
78
79. 20% Land shaping 30% Land shaping
Component Total
Productivity
(kg/ha)
Amount
(x105 Rs )
Total
Productivity
(kg/ha)
Amount
(x105 Rs)
Rice (wet
season only)
2875 0.37 2900 0.38
Fish 895 1.29 743 1.10
Dyke
cropping
489 0.09 489 0.09
Gross Income 1.76 Gross Income 1.57
Total production & income to date
20% provided Rs. 19000/ha ($307/ha) more than 30% to date…
Dry season rice yet to come, also full economic analysis
79
80. Higher fish production with phased harvesting
Higher fish production with 20% pond area
To date, higher value of production with 20% land
shaping
Conclusion
80
82. West Bengal, India
SW& SC Bangladesh
Polder 43/2/F
Polder 30
Polder 3
North 24 Parganas
South 24 Parganas
Homestead production systems: enhanced productivity for
food security in South Bangladesh and West Bengal, India
83. Objectives:
Comparison between southern Bangladesh and
West Bengal –
• Homestead Farming Systems (HFS)
• Socio-economic status of households
• Contribution of HFS to household income &
consumption
• Identify priority areas of improvement
84. Survey Samples (<1 ha-80%; 2012)
Country Region Salinity # HH surveyed
Bangladesh
Polder 43 Low 320
Polder 30 Moderate 338
Polder 3 High 461
Total 1,119
West Bengal
Block Kakdwip Low 120
Block Namkhana Moderate 120
Sandeshkhali I Moderate 120
Sandeshkhali II Moderate 120
Block Sagar High 240
Total 720
87. Land ownership pattern
Total land (field +homestead) Homestead land
Ratio of homestead to field land
Bangladesh
Bangladesh
Bangladesh West Bengal
Bangladesh
West Bengal
West Bengal
West Bengal
Bangladesh
West Bengal
Bangladesh
West Bengal
Homestead land
has higher
importance for
the poor farmers
in Bangladesh
89. Contribution of HFS to annual household income
Country Off-farm Field HFS aq. HFS Non -aq. Total
Bangladesh 667 381 70 176 1,079
West Bengal 800 357 116 93 1,304
Annual household income (US$) from different sources by
country
Non-aq sources
contribute more
to overall income
in Bangladesh
5%
15%
31%
49%
Bangladesh
HFS Aq
HFS Non- Aq
Field
Off farm
9%
7%
25%
59%
West Bengal
90. 10
20
30
40
00
< 1 < 1
Month
%ofhousehold
Bangladesh West Bengal
Food requirement satisfied by own products (HFS +
Field)
• Only ~20% hh with <1 ha land are meeting their year round food
requirement from own production, suggests opportunity for vertical
integration of the systems
• Over all households in West Bengal with higher amount of land supported
their food requirement better than Bangladesh
92. Need further work to better understand the factors influence
consumption in both the countries
-0.2
0
0.2
0.4
0.6
0.8
1
1.2Correlationscore(r)
Bangladesh
West Bengal
Correlation between production and consumption
95. Key remarks
Homestead production system contributes better in meeting
household food security of Functionally Landless groups
while small households are more dependent on non-
homestead production
HFS productivity significantly lower in high salinity areas than
low salinity areas in both the countries
Need to focus more research on improving productivity in
saline areas
No specific factors had significant role in regulating HFS
productivity
Most of the people are not self sufficient/food secured
Raising awareness on the importance of nutrition is crucial
There are opportunities to further improve the status of food
security particularly in the high saline zone
99. Objectives:
to improve nutrition & income through increasing
productivity of homestead ponds
to empower women thru participatory action research
(PAR)
Key pond interventions:
– fish species to increase production & consumption
– feeding strategies to avoid water pollution
– women capacity building
99
100. Locations & partners – under umbrella of G2
Legend:
Freshwater areas
Brackishwater areas
Partners:
CPWF-G2
CSISA
AAS
CCAFS
AIN 100
102. Designing the research: Community consultation
PAR
HFS & integration
Pond water use
Aquaculture
Species selection
Feeding choice
Women participation
102
105. Women Farmer Researchers Learning Sharing Workshop:
Learn
Share
Analyze
Create a movement for PAR
Agenda:
Developing common understanding of research
Documenting major learnings
Participatory evaluation of 2013 research by treatment
Prioritization of development outcomes
Sharing group findings to other groups (global café)
Analyzing problems and planning for new PAR cycle
105
106. Proper technology and care
can increase challenged pond
productivity greatly (x5)
Basic aquaculture
PAR and PM&E
Learning
106
110. Analyze
Quality fish seed supply at beginning of season
Salinity, water quality and disease management
Low cost feed 110
111. Next:
analyze pond record books & impact survey data
consult with communities for 2014 PAR design
Continue to provide technical, facilitation & education
support (gender, nutrition, rights, needs)
continue documenting research & development outcomes
111
114. 114
The big ones:
1. How can we implement improved community management to
achieve the benefits of improved production systems?
(about water; agricultural cropping systems, aquaculture systems)
2. Achieving no. 1 requires additional investment in drainage/water
management infrastructure inside the polders – is it economic?,
what’s the optimum?
Many others specific to components of improved
systems:
• rice varietal improvement (e.g. short duration, cold tolerant boro)
• nutrient cycling in rice-shrimp systems
• homestead production systems (e.g. pond-ecosystem approach)
• sustainability of groundwater pumping for boro rice
• establishment of rabi crops
• aquaculture in saline areas
Research questions for the future (many)
115. 115
Take home messages
1. Tremendous potential to greatly increase productivity, nutritive
value, profitability & resilience of production systems in the
polders
• agricultural systems (rice & non-rice)
• aquacultural systems
• rice-aquaculture systems
• homestead production systems
2. To unlock this potential need to invest in
• improved water mgt
• with special emphasis on drainage mgt (the entry point)
and infrastructure inside the polders
3. Community co-ordination is critical to achieving this – needs
community ownership & to be community-driven
Editor's Notes
we work on all the important systems involving rice, upland or rabi crops, aquaculture, homestead production systems
Working in low, medium and high salinity locations in Bangladesh & India
Identifying superior varieties for all seasons and salinity regimes
10 formal partners (LoAs)
Collaborating with several other projects – e.g. CSISA and CPWF are jointly supporting 3 PhD scholars embedded in the CPWF G2 team
Sukanta, Subasis, Dhiman
47 is bold grain, 61 is medium grain
Haven’t been as successful as we would like to be, at least partly due to issues around cropping system synchronisation and community water management
There are several things that need to happen to improve water management in the polders
250 mm on 2 occasions, the first shortly after transplanting; able to get the water off in 3-4 d with systematic operation of the sluice gate
Polder 30 fresh water in rivers ~7 months
Explain the design for improved mgt – ditch for fish refuge, strong wall so can have deeper water…
This was a huge undertaking in partnership with Feed the Future
FP was managed by the local farmers
2nd stocking delayed due to unavailability of quality seed
Year 1. Significantly higher fish production in improved systems in both water depths
Year 2. Significantly higher shrimp production in both improved systems and sig higher fish production in polyculture
FP not profitable – no green bar above zero in 2012
Improved systems highly profitable,
Higher benefit in farmer’s practice in 2013 due to improved management
Year 1 – very low yields of rice because of big water management problems….
Planned 3 HYV, with salt and some water stagnation tolerance at seedling age of about 35 d. But water too deep and saline & had to wait until seedlings 65 days old – we know that using older seedlings will reduce yield, but no choice because no where to drain. Hence low yields – if we could have managed water depth/salinity as planned expecting 4-5 t/ha.
So we also sourced some traditional taller varieties (43 day old seedlings transplanted) – one of which performed well under these conditions.
Year 2 Yields improved but still disappointing because…..
Photo of netting
Adding fruit and timber tree will increase profitability and resilience
A good way of diversifying gher food products
Reduces soil erosion and increases possibility of integrating livestock within gher system. This can be used as livestock fodder
Systems in which a pond is dug in the field, used for fish production, and for irrigation of rice in the dry season
Photos of the 3 species
Bar graph showing
Use absolute amounts (not per hectare)
Working in low, medium and high salinity locations in Bangladesh & India
Samples covered low, medium and high salinity regions
Socio-economic
Presented in median
Challenged ponds; uses of ponds
An important part of the process is staff capacity building