Food security threatened by sea-level rise

Lately, Vietnamese farmers in the Red River and Mekong deltas have been reporting increased salinity levels in their soil and irrigation waters. How to build a deck video Credit: Trond Rafoss

“High levels of salt in agricultural soil or irrigation water make it difficult for salt sensitive rice plants and other crops to absorb water and necessary nutrients, and as a result, plant growth is suppressed and crop yields significantly reduced.”

Lately, several farmers in the Mekong and Red River deltas in Vietnam, as well as local authorities, have been reporting increased salinity levels in their soil and irrigation waters. Yankees spring training schedule 2016 For many, this has caused damage to their properties, as well as loss of livelihoods and income.

Dr Nagothu has coordinated several research projects looking at future climate change impacts on rice production in South and Southeast Asia. Front yard He says that more targeted research is needed to address salinity related problems. Laying a patio The development of salt-tolerant rice and crop varieties accessible to smallholder farmers is particularly important.

Trond3: The development of salt-tolerant rice and crop varieties accessible to smallholder farmers is a potential measure to overcome salinity related problems. Garden snake eggs Credit: Trond Rafoss

In addition to developing new rice varieties, other measures that can be carried out include the implementation of crop rotation systems, soil salinity management using raised seabeds, and changing the date of sowing. Uw softball camps In some regions, a shift from rice production to shrimp cultivation in ponds is being taken up by farmers, as brackish water shrimp tolerates higher salt levels than most rice varieties.

“To flush out salts from soils in an adequate way, fresh water and a proper drainage system is required,” Dr Nagothu says. Stamped concrete cost calculator “Although drainage channels in the saline affected areas do exist in provinces such as Nam Dinh and Soc Trang in Vietnam, the lack of fresh water due to long drought periods actually render them useless.”

In the Vietnamese Red River Delta, salt water can intrude 30 to 40 kilometres inland, followed by high water levels in the riverbeds and increased sedimentation in canals and flooded plains. University of arizona softball During the dry season, seawater moves even further inland due to lack of fresh water in the canal. Facebook search by city As a result, paddy fields are exposed to high salinity levels in the dry season, making large tracts of productive land unfit for crop cultivation.

“In Bangladesh, one successful measure has been an aquifier recharge which collects fresh water during the rainy season for use in the dry season. Alabama softball schedule This, in combination with improved soil management, can greatly benefit agricultural land vulnerable to salt water intrusion,” Dr Nagothu says.

Through the ClimaViet project, Dr Udaya Sekhar Nagothu and his colleagues have engaged provincial authorities in a series of stakeholder workshops in order to share project results, technology options, capacity building needs and to explore investment alternatives.

Farm testing of salt tolerant rice varieties under different soil and water regimes, training and raising awareness among farmers, as well as developing policy guidelines, have also been important aspects of the project.

According to Dr Nagothu there is a need for an advance in science concerning new rice varieties, alternative cropping systems, physical infrastructure preventing sea-level rise and how to upscale production in line with a growing population.

A more hands-on approach from local policy makers is also necessary. Batting cages nyc Although they acknowledge the issues at hand, adequate funding is rarely provided for research on the development and upscaling of salinity management measures.

“Developing new seed varieties is expensive. Baseball diamond drawing Without sufficient funding, developing more salt tolerant rice and other crop varieties is very difficult,” Dr Nagothu says, and adds, “saline levels in soils and irrigation waters in coastal areas are steadily increasing, and it is vital that something is done about it before the situation gets out of hand.”