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CABI Book Chapter

Tropical deltas and coastal zones: Food production, communities and environment at the land and water interface.

Book cover for Tropical deltas and coastal zones: Food production, communities and environment at the land and water interface.

Description

This book with 33 chapters divided into five parts is a compendium of selected papers from the conference that can be broadly categorized as land and water management, fisheries and aquaculture and rice-based agriculture systems. Intensification of aquaculture and rice-based agriculture frequently produces negative effects that range from environmental degradation to social conflict; managing thes...

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Chapter 11 (Page no: 144)

Soil characteristics of saline and non-saline deltas of Bangladesh.

The delta soils of Bangladesh occur in the coastal region of the Ganges tidal flood plain, the young Meghna estuarine flood plain, the old Meghna estuarine flood plain and the Chittagong coastal plains. Although delta soils constitute some of the most productive lands of the country, their characterization has received little attention, often because of limited accessibility. However, this information is necessary to maximize their use for agriculture to enhance national food security. Soil characteristics of farmers' fields from saline and non-saline delta zones were evaluated to understand their soil fertility status, salt content and distribution in these soils and their potential for the cultivation of modern rice varieties. Electrical conductivity in the saturation extract of the topsoil in the saline zone varied from 1 to 20 dS/m, whereas it ranged from 0.7 to 1.6 dS/m in the non-saline zone. The pH of these coastal soils ranged from moderately acidic to mildly alkaline (5.8-7.8) and soil organic matter varied between 1.2 and 3.6%. The tested soils had a wide range of available phosphorus (2-59 mg/kg) and exchangeable potassium varied from 0.2 cmol/kg to as high as 2.5 cmol/kg soil. Across the soils, potassium saturation was always higher than 2% of the base saturation. Soil analysis indicated widespread zinc deficiency (less than 2 ppm available Zn) in coastal delta soils. Wet-season rice is grown in most of the saline and non-saline areas and, given the moderate percolation rate of these soils and availability of good-quality river water in most of these coastal areas, the land is suitable for rice cultivation. Recently developed salt-tolerant rice varieties (BRRI dhan 40 and BRRI dhan 41 for the wet season; BRRI dhan 47 for the dry season) should be evaluated in these delta areas to replace the currently grown landraces with low productivity, and packages of proper crop and nutrient management options for these modern rice varieties need to be established.

Other chapters from this book

Chapter: 1 (Page no: 1) Policy, planning and management at the land-water interface. Author(s): Szuster, B. Hoanh, C. T. Kam, S. P. Ismail, A. M. Noble, A. Borger, M.
Chapter: 2 (Page no: 13) Aquatic resources and environmental variability in Bac Lieu Province (southern Vietnam). Author(s): Baran, E. Chheng, P. Warry, F. Toan, V. T. Hung, H. P. Hoanh, C. T.
Chapter: 3 (Page no: 33) Integrating aquaculture in coastal river planning: the case of Dagupan City, Philippines. Author(s): Andalecio, M. N. Cruz, P. S.
Chapter: 4 (Page no: 48) Evolution of shrimp aquaculture systems in the coastal zones of Bangladesh and Vietnam: a comparison. Author(s): Joffre, O. Prein, M. Tung, P. B. V. Saha, S. B. Hao, N. V. Alam, M. J.
Chapter: 5 (Page no: 64) Ecological risk assessment of an alien aquatic species: a case study of Litopenaeus vannamei (Pacific whiteleg shrimp) aquaculture in the Bangpakong River, Thailand. Author(s): Senanan, W. Panutrakul, S. Barnette, P. Manthachitra, V. Chavanich, S. Kapuscinski, A. R. Tangkrock-Olan, N. Intacharoen, P. Viyakarn, V. Wongwiwatanawute, C. Padetpai, K.
Chapter: 6 (Page no: 80) Ability of Litopenaeus vannamei to survive and compete with local marine shrimp species in the Bangpakong River, Thailand. Author(s): Panutrakul, S. Senanan, W. Chavanich, S. Tangkrock-Olan, N. Viyakarn, V.
Chapter: 7 (Page no: 93) Improving the productivity of the rice-shrimp system in the south-west coastal region of Bangladesh. Author(s): Alam, M. J. Islam, M. L. Saha, S. B. Tuong, T. P. Joffre, O.
Chapter: 8 (Page no: 106) Zooplankton dynamics and appropriate management approach for blue swimming crab in Kung Krabaen Bay, Thailand. Author(s): Tantichaiwanit, W. Gajaseni, N. Piumsomboom, A. Kunsook, C.
Chapter: 9 (Page no: 117) Rebuilding resilient shrimp aquaculture in South-east Asia: disease management, coastal ecology and decision making. Author(s): Bush, S. R. Zwieten, P. A. M. van Visser, L. Dijk, H. van Bosma, R. Boer, F. de Verdegem, M.
Chapter: 10 (Page no: 133) Integrated management of aquatic resources: a Bayesian approach to water control and trade-offs in Southern Vietnam. Author(s): Baran, E. Jantunen, T. Chheng, P. Hoanh, C. T.
Chapter: 12 (Page no: 154) Designing resilient rice varieties for coastal deltas using modern breeding tools. Author(s): Ismail, A. M. Thomson, M. J. Vergara, G. V. Rahman, M. A. Singh, R. K. Gregorio, G. B. Mackill, D. J.
Chapter: 13 (Page no: 166) The right rice in the right place: systematic exchange and farmer-based evaluation of rice germplasm for salt-affected areas. Author(s): Singh, R. K. RedoƱa, E. Gregorio, G. B. Salam, M. A. Islam, M. R. Singh, D. P. Sen, P. Saha, S. Mahata, K. R. Sharma, S. G. Pandey, M. P. Sajise, A. G. Mendoza, R. D. Toledo, M. C. Dante, A. Ismail, A. M. Paris, T. R. Haefele, S. M. Thomson, M. J. Zolvinski, S. Singh, Y. P. Nayak, A. K. Singh, R. B. Mishra, V. K. Sharma, D. K. Gautam, R. K. (et al)
Chapter: 14 (Page no: 183) Rice varieties and cultural management practices for high and sustained productivity in the coastal wetlands of southern Bangladesh. Author(s): Salam, M. A. Islam, M. R. Rahman, M. S. Rahman, M. A. Bhuiyan, M. A. R. Seraj, Z. I. Aditya, T. L. Uddin, M. K. Mondal, M. K. Ismail, A. M. Adorada, D. L. Mendoza, R. D. Tumimbang-Raiz, E. B. Gregorio, G. B.
Chapter: 15 (Page no: 199) Boro rice for food security in coastal West Bengal, India. Author(s): Roy, S. K. B.
Chapter: 16 (Page no: 209) Strategies for improving and stabilizing rice productivity in the coastal zones of the Mekong Delta, Vietnam. Author(s): Lang, N. T. Buu, B. C. Viet, N. V. Ismail, A. M.
Chapter: 17 (Page no: 223) Diversified cropping systems in a coastal province of the Mekong Delta, Vietnam: from testing to outscaling. Author(s): Ni, D. V. Phat, T. D. Lu, T. Tung, P. B. V. Ben, D. C. Vu, D. H. Thai, P. H. Giang, P. H. Tuong, T. P.
Chapter: 18 (Page no: 239) Improving rice productivity in the coastal saline soils of the Mahanadi Delta of India through integrated nutrient management. Author(s): Mahata, K. R. Singh, D. P. Saha, S. Ismail, A. M. Haefele, S. M.
Chapter: 19 (Page no: 249) Crop diversification for improving water productivity and rural livelihoods in coastal saline soils of the Mahanadi Delta, India. Author(s): Singh, D. P. Mahata, K. R. Saha, S. Ismail, A. M.
Chapter: 20 (Page no: 264) Water supply and demand for dry-season rice in the coastal polders of Bangladesh. Author(s): Mondal, M. K. Tuong, T. P. Sharifullah, A. K. M. Sattar, M. A.
Chapter: 21 (Page no: 279) An analysis of environmental policy strategies for coastal land conservation in Thailand. Author(s): Pongthanapanich, T.
Chapter: 22 (Page no: 293) Conflicts and governance: perspectives on an eastern and western coastal wetland in India. Author(s): Narayanan, N. C.
Chapter: 23 (Page no: 307) Farmers' assessment of resource management and farm-level technological interventions in the Mekong Delta, Vietnam. Author(s): Can, N. D. Khiem, N. T. Hossain, M. Tuong, T. P.
Chapter: 24 (Page no: 320) Assessing needs, constraints and livelihood opportunities in coastal saline environments: a case in Orissa, India. Author(s): Paris, T. R. Saha, S. Singh, D. P. Mahata, K. R. Cueno, A. delos R. Zolvinski, S. Ismail, A. M.
Chapter: 25 (Page no: 335) Participatory management of coastal resources: a case study of Baganchra-Badurgacha subproject in the South-west of Bangladesh. Author(s): Islam, M. N. Rinfret, J. R. Islam, Q. R.
Chapter: 26 (Page no: 350) Learning to build resilient coastal communities: post-tsunami recovery in Sri Lanka and Indonesia. Author(s): Larsen, R. K. Thomalla, F. Miller, F.
Chapter: 27 (Page no: 367) Social vulnerability to coastal hazards in South-east Asia: a synthesis of research insights. Author(s): Zou, L. Thomalla, F.
Chapter: 28 (Page no: 384) An extended hydrological classification for mangrove rehabilitation projects: a case study in Vietnam. Author(s): Dijksma, R. Loon, A. F. van Mensvoort, M. E. F. van Huijgevoort, M. H. J. van Brake, B. te
Chapter: 29 (Page no: 398) Coastal transects analysis of Chao Phraya Delta, Thailand. Author(s): Chuenpagdee, R. Traesupap, S. Juntarashote, K.
Chapter: 30 (Page no: 409) Mangrove system sustainability: public incentives and local strategies in West Africa. Author(s): Cormier-Salem, M. C. Bernatets, C. Sarr, O.
Chapter: 31 (Page no: 422) Assessing the impact of small-scale coastal embankments: a case study of an LGED polder in Bangladesh. Author(s): Chowdhury, A. K. M. Jenkins, S. A. M. Hossain, M.
Chapter: 32 (Page no: 436) Dynamics of livelihoods and resource use strategies in different ecosystems of the coastal zones of Bac Lieu Province, Vietnam. Author(s): Khiem, N. T. Hossain, M.
Chapter: 33 (Page no: 448) Utilization of aquatic resources along the North Brazilian coast with special reference to mangroves as fish nurseries. Author(s): Saint-Paul, U. Barletta, M.