Leone, Jan.89 Water control through Sawah system is ... · Key words & Key concepts....
Transcript of Leone, Jan.89 Water control through Sawah system is ... · Key words & Key concepts....
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West African Rice Green Revolution based on Sawah Ecotechnology in African Satoyama Watersheds. Wakatsuki, Fashola & Buri Guinea, Aug.03
Inland valley, SierraLeone, Jan.89
Nupe’s indigenous rudimentary Sawah system, Nigeria,Sep.05
Fish & Rice
No Sawah, No Green Revolution
CRI/JICA Sawah project, Ghana, Aug.01
Water control through Sawah system is prerequisite for Green Revolution in SSA
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Key words & Key conceptsEco-technology, or, Ecological Engineering: Sustainable
technology to improve ecological environment of crops, trees and animals. Sawah technology is an example
Sawah hypothesis (I): The core technology to realize the green revolution in West Africa is eco-technology, such as lowland sawah ecotechnology
Sawah hypothesis (II): Sustainable Productivity of lowland Sawah is more than 10 times than upland fields, if appropriate lowlands are selected, developed and managed. African Satoyama systems: Sato means villagers’
habitat and Yama means multipurpose forests managed by villagers. Because of intensive sustainability of lowland sawah systems, degraded upland fields can be converted to multipurpose forests, which will eventually contribute the combat to global warming.
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Fig.Taiwan Project sites : ESAFS Pioneer for Sawah Ecotechnology transfer to Africa(Phase I:1960-75 and Phase II:1995-present)
Sahara DesertMalawi
Chad
Central Africa
D.R. of Congo
Rwanda
Liberia
Gambia
TogoBenin
Ghana
Senegal Niger
Cameroon
Gabon
CoteD’Ivoire
Mali:China
Nigeria:ChinaJapanKorea
China
Japan
Vietnam,Malaysia, Thailand
Guinea:N Korea
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Target 1:Field Facts and Impacts1. Increase Sawah Farmers2. Increase Leading Sawah Farmers Group, such
as Amuni Club C and Achiber rice farmers group,15-20 in 2010.
3. Inrease Sawah Area:100ha in 20104. Increase Sawah Based Paddy Production:400ton
in 20105. Clear Publicity: Farmers’ day, News paper, TV,
and New Fund: IVRDP and UN Millennium village Project
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Tewiah site in CRI/JICA sawah project
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Sawah is ecotechnology based Multi-Functional constructed Wetland: Production, Environment, and Cultural landscape
Inland valley, Ashanti, Ghana
Termitemound
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Biemso No.1, Zongo site in 2002
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Inland Valley Rice Development Project, World Bank, 4500ha in 2004-2009Biemso No.1, Ashanti, Ghana, Aug 2005
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Biemso No.1, Zongo site,New Sawah project, Sep.2007
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Tanokurom, Tepa, Sep. 2007
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Amakurom, possible New site by SRI in 2008
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Mansokuwanta, UN Millennium village, possible new sawah Demonstration site in 2008
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Mr. Isaac and rice farmer, Mansokuwanta, UN Millennium village
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Asia
0
50
100
150
200
250
300
350
1961 1966 1971 1976 1981 1986 1991 1996 2001Year
Production(kg/person)
MilletSorghumYams (1/5)Cassava (1/MaizeWheatRice, Paddy
SSA
0
50
100
150
200
1961 1966 1971 1976 1981 1986 1991 1996 2001
Year
(kg/person)
M illetSorghumYams (1/5)Cassava (1/8)M aizeWheat-ImportWheatPaddy Rice-ImportRice, Paddy
African crops are diverse, even production potential of rice is higher than demand, rice is importing. Wheat has not enough production potential in
majority of SSA countries. Rice is also the highest quality cereals in terms of egg protein equivalent among the other 6 crops
Production trend (kg/person) of diversified African crops in comparison with Asia
150kg
paddy/person/year
can supply all necessary calories and proteins
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Production & Import- Ghana
0
50
100
150
200
250
1961 1966 1971 1976 1981 1986 1991 1996 2001
Year
(kg/person)
Millet
Sorghum
Yams (1/5)
Cassava (1/8)
Maize
Wheat-Import
Rice, Paddy-Import
Rice, Paddy
Production & Import (kg/person) -Ghana
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Production & Import- Nigeria
0
50
100
150
200
250
300
350
1961 1966 1971 1976 1981 1986 1991 1996 2001
Year
(kg/person)
Millet
Sorghum
Yams (1/5)
Cassava (1/8)
Maize
Wheat-Import
Rice, Paddy-Import
Rice, Paddy
Production & Import (kg/person) -Nigeria
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0
500
1000
1500
2000
2500
3000
1961 1966 1971 1976 1981 1986 1991 1996 2001
Year
(kg/ha)
Rice, PaddyMaizeCassava (1/8)Yams (1/5)SorghumMillet
Yields (kg/ha) -Nigeria
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0
500
1000
1500
2000
2500
3000
1961 1966 1971 1976 1981 1986 1991 1996 2001
Year
(kg/ha)
Rice, PaddyMaizeCassava (1/8)Yams (1/5)SorghumMillet
Yields (kg/ha) -Ghana
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Asia
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
1961 1971 1981 1991 2001Year
Production (kg/ha)
Cassava (1/8)
Yams (1/5)
Rice, Paddy
Maize
Millet
Sorghum
Fig. Asia, cereals production in kg per ha (FAOSTAT 2006)
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Target 2: Academic Publications1. Number of Academic Papers per Year: 4-82. Number of Academic Paper per Scientist:1 per year3. Number of Qualified International Conference
Papers per Year: 4-84. Number of Citation Journal’s Paper per Year :
2-45. Completion of Ph.D program: 5 by 2012
E. Owusu Sekyere (2008), J. Opong, E. Boateng, G.K. Achempong, and M. Bandoh
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Groundwater Sutable
SawahUpland-like
Draught prone SuitableSawah
Practices of EcoPractices of Eco--technology development of various sustainable technology development of various sustainable Sawah system options in 50Sawah system options in 50--100ha in Ghana and Nigeria100ha in Ghana and Nigeria
New land systems for enhance sustainable Sawah New land systems for enhance sustainable Sawah development in present diverse development in present diverse landuse landuse systems systems
under diverse sociounder diverse socio--economy and history economy and history
Fig. Materialization of Green Revolution: Long-term Action Researches and the Creation of Africa SATOYMA watershed Model in collaboration with hundred farmers living in the two benchmark watershed in Ghana & Nigeria
Nutrient
cycling
Rainfall
Rock weathering, soilFormation,nutrient release
Topsoil erosion &sedimentation
Geological fertilization
村
Upland:500‐50,00ha(95%)
Functional humified organic fertilizer
Intensive upland farmings need Integration with livestock raising
Supply of nutrients by animalsNutrient rich water
Fish pond
Discharge
Lowalnd(5%)
Sawah hypyhesis(II): Sustainable productivity1ha Sawah equivalents 10-15ha upland fields
Irrigation cannal
Watershed Agroforestry: Africa SATOYAMA
The prerequisite of Green revolution is sawah fields which
improve rice ecology
Sawah hypothesis(I)
Extremely diverse lowland ecosystemsExtremely diverse lowland ecosystems
Ghana:
SRI/CRI/FoRIG/WRRI
Forest transition zoneNigeria:NCRI/NSADPGuinea savanna zone
Various Sawah system options suitable for diverse lowland ecosystems were carried out by participating farmers’ self-support efforts with trials and errors approach (Results of previous long- term action research
Target of this Action R
esearch
Main Goal: Sustainableproduction of 100million
tons of paddy through 20 million ha of lowland Sawah development.The restoration of 100million ha of forest to combat Global Warming
Agroforestry trials using both Indigenous &Exotic trees
Sustainable selfSustainable self--support Sawah development & management.support Sawah development & management.The creation of Africa SATOYAMA model, Village basedThe creation of Africa SATOYAMA model, Village based
watershed development & managementwatershed development & management
WRDA (NERICA)
Biotechnology
collaboration
Development business: UN Millenium villages /World Bank/AfD Bank/JBIC/USAID/JICA /NGOs
Floodprone
Spring
IWMI Hydrology
IITAFarming systems
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Key words & Key conceptsEco-technology, or, Ecological Engineering: Sustainable
technology to improve ecological environment of crops, trees and animals. Sawah technology is an example
Sawah hypothesis (I): The core technology to realize the green revolution in West Africa is eco-technology, such as lowland sawah ecotechnology
Sawah hypothesis (II): Sustainable Productivity of lowland Sawah is more than 10 times than upland fields, if appropriate lowlands are selected, developed and managed. African Satoyama systems: Sato means villagers’
habitat and Yama means multipurpose forests managed by villagers. Because of intensive sustainability of lowland sawah systems, degraded upland fields can be converted to multipurpose forests, which will eventually contribute the combat to global warming.
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Northeastern plateau area in Thailand, July 06
Lagos Airport, Aug. 05
Dar es Salaam airport, July 06
Farmers fields are demarcated No clear demarcation
What is Sawah ?Bangkok Airport 05
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Farmers’ Fields: Diverse and mixed up environment.No clear field demarcations
Sawah based eco-technology: Diverse but well characterized and demarcated fields, which are prerequisite to improve rice environment, especially for water control. Green revolution technology of fertilizer, irrigation and HYV are useful.
Mixed farming systems,Diverse crops,Mixed up varieties:A B C D E……
pure variety Apure variety Bpure variety Cpure variety DFertilizer, Irrigation, and HYV are
not effectiveNo Green Revolution possible
APCDEFAFIZPCMGMDUGHIGKCDILMBN
NPQTBBAACIGHOLKJDBVIRNJUAHGDNVAPCDEFAFTGMDUGHIGKCDILMGHOLNHNPQTBBAACIGHXLKJDHGLP
IRNJUAHGDNVGHOLKNPSDTBBAACIGHYLKJDIRNJHG
UAHGDNVAPCDEFKLGA B GHIGKCDIMB
AA
FFEE CC
J JHH I I
MM LL
D
K K
BB
Fig. 6. Successful Integrated Genetic and Natural Resource Management needs
classified demarcated land eco-technologically
Sawah based Farming system
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Sawah is a man-made, improved rice-growing environment with demarcated, bunded, leveled, and puddled fields, forwater control. Sawah is soil based eco-technology
Because of diverse soil, geology, topography, hydrology, climate, vegetation and socio-cultural conditions, the technologies for sawah development and management are very diverse. Therefore we have to research and develop the technology to accommodate in diverse SSA ecology.
Fig.2 Rice (variety) and environment (Sawah) improvement Both Bio & Eco-technologies must be developed in balance
Rice variety and Rice with Sawah Systems
Water in
Water out
Biotechnology and Ecotechnology
Varieties couldsolve the main problems in Asia
Is this alsotrue in SSA?
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Comparison between Biotechnology and Ecotechnology Options for Rice Production
(1) Water shortage:Genes for deep rooting、C4-nature、and Osmotic regulation. Eco-technology of Sawah based soil and water management, bunding, leveling, puddling, well, weir,tank irrigation, System rice intensification
(2) Poor nutrition, acidity and alkalinity:Gene of Phosphate and micronutrient transporter. Eco-technology of Sawah based N fixation, increase P availability and micro- as well as macronutrient. Geological fertilization, Watershed agroforestry, organic matter and fertilization. Bird feculent are rich in P.
(3) Weed control:Gene of weed competition, rapid growth. Eco- technology of Sawah based weed management through water control.and tans-planting. Leveling quality of sawah is important. Duck and rice farming.
(4) Pest and disease control: Resistance genes. Eco-technology of Sawah based silica and other nutrients supply to enhance immune mechanisms of rice. Mixed cropping.
(5) Food quality: Vitamine rice gene. Sawah based nutrition control. Fish, duck and rice in sawah systems
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Inland Valley, Sierra Leone
No ecotechnology measures
Weeds are stronger: upland rice, Bida Nupe’s traditional partial water control system
Once Sawah systems are developed by farmers’self-support efforts and water is controlled,
majority of HYV can produce higher than 5 t/ha
Nupe’s indigenous partial water control system
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Canal construction by farmers
Simple barrage by farmers’ efforts
Top-survey, Inland valley, Ashanti, Ghana
Spring Irrigated Rudimentary Sawah, Nupe
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Table Mean gain yield of 23 rice cultivars in low land ecologies at low (LIL) and high input levels (HIL), Ashanti, Ghana (Ofori & Wakatsuki, 2005)
Entry No. Cultivar
ECOTECHNOLOGICAL YIELD IMPROVEMENTIrrigated Sawah Rainfed sawah Upland like fields
HIL LIL HIL LIL HIL LIL(t/ha) (t/ha) (t/ha)
1 23456789
1011121314151617181920212223
WAB EMOKPSBRC34PSBRC54PSBRC66BOAK189WITA 8 Tox3108IR5558 IR58088IR54742C123CUCT9737 CT8003CT9737-PWITA1 WITA3WITA4WITA6WITA7WITA9WITA12GK88
4.6 4.07.78.05.77.07.87.17.97.77.76.96.57.38.27.67.68.08.07.37.67.67.5
2.9 2.83.53.73.33.84.24.14.04.04.34.14.03.84.03.63.54.13.53.74.44.03.8
2.8 2.93.03.83.83.74.44.03.83.74.04.24.03.84.33.34.13.74.03.84.53.83.5
1.6 1.32.12.12.02.02.12.32.01.82.21.91.71.71.81.82.02.12.32.22.81.92.0
2.1 1.42.01.71.81.41.82.31.81.41.92.01.92.01.20.91.31.51.42.02.01.81.8
0.6 0.50.40.40.40.30.50.60.50.30.40.40.60.50.50.30.50.30.30.40.60.40.5
Mean (n=23) 7.2 3.8 3.8 2.0 1.7 0.4Range (4.0-8.2) (2.8-4.4) (2.8-4.5) (1.3-2.8) (0.9-2.3) (0.3-0.6)
SD 1.51 0.81 0.81 0.45 0.44 0.12
BIO
TEC
HN
OLO
GIC
AL
IMPR
OVE
MEN
T
Because of cost of green revolution technology, yield must be higher than 4t/ha
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Table 4: Sawah hypothesis(II): Sustainable Productivity of lowland Sawah is more than 10 times than Upland Field
1ha sawah is equivalent to 10-15ha of upland
Upland Lowland(Sawah)Area (%) 95 % 5 %Productivity (t/ha) 0.5-3 1 3-8 2**Required area for sustainable1 ha cropping 5 ha : 1 ha
* Assuming 2 years cultivation and 8 years fallow in sustainable upland cultivation, while no fallow in sawah
**In Case of No fertilization
**
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Macro- and Micro-scale Ecological Mechanisms of Intensive Sustainability of Lowland Sawah Systems
(1)Geological Fertilization: lowland can receive water, nutrients, and fertile toposils from uplands.
(2) Multi-functional Constructed Wetlands for control weed and enhanced Supply of N, P, Si, and other Nutrients
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Concept of Watershed Eco-technology, i.e.,(1)Watershed Agro-forestry and
(2)Multi-functional Sawah type wetland are key components
(0.5~10%)
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Japanese Inland Valley (SATO-YAMA systems): Integration of Forest, Pond
and lowland Sawah in watersheds
Sawah is Multi-Functional Wetland: Rice, Algae, and
Microbes’ Complex Ecosystems
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Topsoil, water, and nutrients accumulation through watershed agroforestry
N-fixation, increasing P availability and pH neutralization
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Fig.8. Rate of soils erosion in the world (Walling1983)
Sediment Yieldt. ha-2. yr-1
10.07.55.02.51.00.5
Deserts and permanent ice
Can watersheds of SSA sustain Sawah system? High rate of soil erosion and lowland sawah soil formation can be compensated by high rate of soil formation in Asia. However soil formation, soil erosion and hence lowland soil formation are very low in comparison with Asian
watersheds: Ecological Balance studies are necessary
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Rainfall + Rock == Soil + River + Ground Water + Vegetation
Geo-chemical Mass Balance in Matured Mountain Forest :
River-Rainfall = Rock – Soil
Geo-chemical Element Distribution in Watershed :
Dynamics of Elements in Watersheds
河川 降水P: Precipitation
G: Ground Water
V: Vegetation
S: Soil FormationNutrient Cycling
R: Rock Weathering
D: Outflow via River Discharge
Rainfall Percolation
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Ri = Concentration
of elements i
n rock
xy
z
Si = Concentrations of elements in soil
( g / t )
Slope = 2.92
Slope = -1.76
Si
Ca
AlFe
NaMg K
Z(x,y)=2.92x-1.76 y
D Di -PPi
= R
=-S
G.Gadut (Indonesia) watershed soilrockriver precipitation
D Di – P Pi = Ri ×R – Si×S
R=2.92 S=1.76 (t/ha/y)
x y
z
R: Rate of rock weathering (t / ha / y)S: Rate of soil formation (t / ha / y )
R =
×S +
Na
K
Ca
Mg
Al
Fe
Si
⎛⎜⎜⎜⎜⎜⎜⎜⎝
⎞⎟⎟⎟⎟⎟⎟⎟⎠
Na
K
Ca
Mg
Al
Fe
Si
⎛⎜⎜⎜⎜⎜⎜⎜⎝
⎞⎟⎟⎟⎟⎟⎟⎟⎠
Na
K
Ca
Mg
Al
Fe
Si
⎛⎜⎜⎜⎜⎜⎜⎜⎝
⎞⎟⎟⎟⎟⎟⎟⎟⎠
Ri
Si DDi -PPi
-S =
×R +
Na
K
Ca
Mg
Al
Fe
Si
⎛⎜⎜⎜⎜⎜⎜⎜⎝
⎞⎟⎟⎟⎟⎟⎟⎟⎠
Na
K
Ca
Mg
Al
Fe
Si
⎛⎜⎜⎜⎜⎜⎜⎜⎝
⎞⎟⎟⎟⎟⎟⎟⎟⎠
Na
K
Ca
Mg
Al
Fe
Si
⎛⎜⎜⎜⎜⎜⎜⎜⎝
⎞⎟⎟⎟⎟⎟⎟⎟⎠
Ri
Si
DDi -PPi
-
Multiple regression method for estimating rates of weathering and soil formation in water sheds.
( g / t )
Dis
char
ge fr
om r
iver
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Iu River(Granite)
0
4
8
12
16
R S
R=0.83 (t/ha/y)S=0.60 (t/ha/y) Hurbbardbrook
(AcidBaseMix)
0
4
8
12
16
R=0.31
(t/ha/y)S=0.16
(t/ha/y)
Gado River(Andesite)
0
4
8
12
16
R=2.8 (t/ha/y)S=1.3 (t/ha/y)
Biem
River(Sandstone)
0
4
8
12
16
R=0.43 (t/ha/y)S=0.23 (t/ha/y)
Iu River(Tuff)
0
4
8
12
16
R=3.5 (t/ha/y)S=2.9 (t/ha/y)
Casrian River(Granite)
0
4
8
12
16
R=15.6 (t/ha/y)S=12.3 (t/ha/y)
Rate of Soil Formation and Rock Erosionat Japan, Indonesia, North America WatershedJapan
North America
Ghana Indonesia
(1994, 2001)
R S
R S
R S R S R S
Z=0.40 (t/ha/y) Z=1.20 (t/ha/y)
Z=0.09
(t/ha/y)
Z=0.18 (t/ha/y)Z=1.50 (t/ha/y) Z=1.60 (t/ha/y)
Nigeria
(Sandstone)
0
4
8
12
16
R=0.07 (t/ha/y)S=0.0 (t/ha/y)
R S
Z=0.16 (t/ha/y)
Emikpta
River
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Inland Valley Rice Development Project, World Bank, 4500ha in 2004-2009Biemso, Ashanti, Ghana, Aug 2005
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Fig. 2: Concept of Characterization and quantitative mapping of Lowland diversity for sawah development (bunded, leveled, puddled rice land) . depending on the watershed land use, lowland topography, soil, hydrology and Agroecological zones
Upland waterWater harvestable lowland
contour bundflood prone
lowlandWater table and ground water spring irrigable
sloped lowlandlowland butupland ecology
typical irrigable lowland
river[S]
[W]
[U][L]
[F]
[U]
Irrigation options: Sawah to sawah/contour bund water harvesting, spring, dyke, river, pump, peripheral canal, interceptor canal, tank
springsawah
Lowland sawah development priority[S] > [L] > [F] > [W] > [U]
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lowland is lower fertility except for P availability
Fig.14
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January 2003,Ikonos
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Classification Area (million ha) Percentage(%)
Coastal swamps 16.5 (3 ?) 10-30%
Inland basins 107.5 (2 ?) 1-3%
Flood plains 30.0 (6 ?) 10-30
Inland valleys 85.0 (10 ?) 3-10
Possible area of sawah development (million ha)
Max 20million ha (Estimated sawah area came from the relative amount of water cycle in Monsoon Asia, which has 100 million ha of sawah)
Distribution of lowlands and potential irrigated sawah in SSA (Hekstra, Andriesse, Windmeijer 1983 & 1993,
Irrigated Sawah area estimate by Wakatsuki 2002)
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Fig. 8. Concept of Integrated Genetic and Natural Resources Management (IGNRM) for green revolution technology :
Missing link is Sawah which is lacking in majority of famers’ fields
Water, Fertilizer and Soil mgt, Legume, Manure, animal traction ,power tiller, fish and rice vegetable after rice, BNF, Iron toxicity, P deficiency, IPM, Striga, Weed mgt, Cover crops, Cropping systems research, CH4 emission, carbon sequestration, etc. Crop Physiology, Long-term field experiments
Missing link is “sawah”in SSAfrica
High yieldHigh qualityHigh tolerance
IGNRM for Green Revolution technologies :
Ecotechnologically demarcated field for water Management has to be existed:
High quality leveled rice field (±5cm)High quality bunded rice field (no leaking)High quality puddled rice field (nursery )
IGNRM
Rice variety
Improvementdissemination
technology
Rice Environment
Improvement and dissemination
technology