Farmers in Soc Trang Province's Hong DanDistrict, for example, began planting soi, a saline-resistant ricevariety, early this year on 260ha in Ninh Thanh Loi, Ninh Thanh Loi Aand Vinh Loc communes.
Previously, the three communes could only cultivate cajuput, water coconut palm and shrimp.
In2009, the district's authorities asked Can Tho University to conductresearch on a rice variety that could grow in these communes, which wereaffected by saline intrusion and alum.
University experts chose the soi variety, which can survive with a saline content of 0.1 percent.
Thisrice variety, which has a maturity period of 150 days, has a yield ofmore than 4 tonnes per hectare. The university continues to improve thiskind of rice variety.
ST, a fragrant rice variety developed in Soc Trang, has developed well in saline water areas, including in rice-shrimp fields.
In2011, the Delta has also officially put into cultivation 15 newsaline-resistant rice varieties. These varieties have high yield and cangrow in water with a content of 0.4-0.6 percent salt.
These varieties have been planted in Kien Giang, Ca Mau and Bac Lieu provinces.
Most of these farmers grow rice and raise shrimp on their fields, a model that has been used more frequently in recent years.
Themodel areas have risen from a few thousand hectares in 2005 to160,000ha last year, according to the Plant Cultivation Department underthe Ministry of Agriculture and Rural Development.
In therice-shrimp farming model, farmers in coastal provinces let salt waterenter fields to farm shrimp in the dry season and use rainwater to growrice in the rainy season.
Vo Van Be, deputy director ofthe Soc Trang Agriculture Extension Centre, said the province's rice-shrimp farming model has been a success after two years.
In Soc Trang's My Xuyen District, more than 10,000ha had been cultivated under the rice-shrimp farming model.
InBac Lieu Province, the rice-shrimp farming area has reached 28,700haand is expected to increase to 35,000-40,000ha by 2015, according to theprovince's Department of Agriculture and Rural Development.-VNA