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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 18 (Page no: 239)

Improving rice productivity in the coastal saline soils of the Mahanadi Delta of India through integrated nutrient management.

The coastal saline belt of the Mahanadi Delta in Orissa, India, is mostly monocropped with rainfed rice during the wet season (WS). In the dry season (DS), a small area is planted to rice using harvested rainwater. Currently, yields are low; however, integrated nutrient management combined with improved salt-tolerant rice varieties could increase system productivity substantially. On-farm trials were conducted in the Ersama block of Jagatsinghpur district (Orissa) using rice varieties Pankaj (shallow lowland) and Lunishree (intermediate lowland) in the wet season and Annapurna and Canning 7 in the dry season. Selected nutrient management practices were evaluated during 2004-2006 and the most promising options were validated in participatory farmer-managed trials in 2006-2007 conducted at six to eight locations. In the shallow lowlands, Sesbania green manuring (GM)+prilled urea (PU; 20 kg/ha N), Azolla+PU (30 kg/ha N) and Sesbania+Azolla were as effective as PU at 60 kg/ha N, in both the 2004 and 2005 WS, with a yield advantage of 30-40%. In the intermediate lowlands, the grain yields with Sesbania in 2004 and farmyard manure (FYM; 5.0 t/ha)+PU (20 kg/ha N) in 2005 were comparable with the yield achieved with urea supergranules (USG; 45 kg/ha N), which had limited scope because of unavailability and placement problems. The yield advantage of these treatments was 23-68%. During the DS of 2005 and 2006, Azolla+PU (50 kg/ha N) resulted in significantly higher yields (15%) than the application of PU at 80 kg/ha N. In demonstration trials at six on-farm sites in the 2006 WS, Sesbania and Sesbania+Azolla increased rice yields in the shallow lowlands by 12-40% (mean 23%) and 19-77% (mean 41%), respectively. In the same season, the yield advantage due to Sesbania was 8-50% (mean 29%) for eight on-farm sites in intermediate lowlands. In the 2007 DS, Azolla increased rice yield by 16-35% (mean 24%) over a control treatment at eight onfarm sites. These findings suggest that, under both the shallow and intermediate lowlands, Sesbania for the WS and Azolla biofertilizer for the DS are promising organic nutrient sources that can improve soil quality and contribute to enhancing and sustaining crop productivity in coastal areas.

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: 11 (Page no: 144) Soil characteristics of saline and non-saline deltas of Bangladesh. Author(s): Saleque, M. A. Uddin, M. K. Salam, M. A. Ismail, A. M. Haefele, S. M.
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: 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.