A little salt in your rice?

1 Craquellent the green shoots of a salt land rice miniature. In addition, potted plants, heavy with grain, yellow. In the greenhouses of the Institute for Research on rice in the Mekong Delta (Cuu Long Delta Rice Research Institute,  CLRRI ), near the city of Can Tho, South Vietnam, agronomists develop the cereal tomorrow. Imperative: it must thrive in an environment loaded with salt. From March to May, during the dry season, sea water each year affects more crops. These months, at least 700,000 hectares of rice fields, located 70 km up the coast, suffer from salinity in the Mekong Delta. "We must constantly push the limitesde plant tolerance to salt," insists Nguyen Thi Lang, a geneticist at CLRRI. The method? Combine a variety resistant to salt water with another renowned for its grain yield, by dint  of crossing over several  generations. Using molecular markers for genes sought – save time – the technique was perfected in recent years. The Institute of Vietnamese Ministry of Agriculture has developed a number of hybrids, the names of asteroids. The AS996, for example, puts up with water two to three times saltier than the one that can support a traditional rice. It was used to inoculate the coastal districts of Vietnam and parts of Bangladesh, countries also deltas. "But we need to develop scales because each region has its own characteristics, said Nguyen Thi Lang. We do not seek need to develop scales because each region has its own characteristics, said Nguyen Thi Lang. We do not seek a variety miracle. " In laboratories CLRRI was created a rice planting during the rainy season, adapted to countless shrimp ponds – heavily salted – Ca Mau. In this province,  the southernmost of the country, Tran alternates aquaculture and rice.  "I earn more with shrimp," said the head of a tin shack on the banks of its 2011/07/07http://www.courrierinternational.com/article/2011/06/23/un-peu-de-sel-dans-votre-riz operations.  "But the disease can destroy a breeding wide. Rice provides a more stable income. " Second largest exporter of the cereal consumed most of the world, Vietnam  is worried about the  future of his "rice bowl", the Mekong Delta that provides half of the production National. The prolonged episodes of drought and upstream dams depleting the river of fresh water, which gives free rein to saline intrusion. "Maintain the amount of cultivated rice is now the challenge. And we must meet mandatory because the population of Vietnam [86 million] will have 14 million more mouths to 2020, " Le Van Banh warns, the director of CLRRI. The UN says it will increase global production by 40% before 2030 to meet population growth. Improving rice yields in spite of salt: what if the solution lay in another species? "Scientists working on the Vietnamese genes from algae, " says Le Quang Hoa, a researcher at the Polytechnic Institute of Hanoi and author of a thesis on the salinity and rice. "But it is difficult for an exporting country to adopt a transgenic cereal. " While searching for the antidote to salt, the researchers advocate, among others, the raising of the dikes around the cultures. According to forecasts of rising sea level, half the land in the Mekong Delta will be flooded in 2100.

Impossible to imagine a rice sailor.  "Even if we manage to double or triple the threshold detolérance salt varieties most efficient (that is 5 or 6 grams / liter today), it will be too little to resist salinity of the ocean, which is about 30 g / l, " warns Le Quang Hoa. Long before the great flood, farmers give up already.  "This month, three times, the river that runs through the town was loaded with salt," laments Thu Nguyen Thanh, a farmer from Soc Trang in the Delta Mekong, though some sixty miles from the coast. "Child, I was swimming, she had never tastes salty." CLRRI The Can Tho educates rice to  other crops such as sesame or soy .  ‘Of course, we continue to seek and develop new varieties more resistant, " Nguyen Thi Lang wants to believe, the geneticist.  "But we must consider the areas unsuitable for rice cultivation and for the population, other sources of income. " This morning, Nguyen Thanh Thu inspects the work of its workers. The plot of that visit is covered ditches, between  which the land is covered  with a plastic sheet. Women, protected from the sun under their conical hats, the percent with an iron tool. They prepare the next harvest. "Here, two years ago, it was a rice field, loose Thu. Now it is a field of watermelons. "

http://www.vaas.org.vn/NewsDetails.aspx?NewsID=875&CateID=131


Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /home/agriviek8Qv/agriviet.net/public_html/wp-includes/comment-template.php on line 2522

Leave a Comment