Đăng nhập
Tìm kiếm nâng cao
Tên bài báo
Tác giả
Năm xuất bản
Tóm tắt
Lĩnh vực
Phân loại
Số tạp chí

Bản tin định kỳ
Báo cáo thường niên
Tạp chí khoa học ĐHCT
Tạp chí tiếng anh ĐHCT
Tạp chí trong nước
Tạp chí quốc tế
Kỷ yếu HN trong nước
Kỷ yếu HN quốc tế
Book chapter
Tạp chí quốc tế 2016
Số tạp chí 154(2016) Trang: 1015-1025
Tạp chí: Journal of Agricultural Science
Liên kết:

Rice production in the Mekong Delta, Vietnam is threatened by future water scarcity caused by changing rainfall patterns and increasing irrigation costs. To improve resilience of the triple rice farming system to future climaterelated stresses, profitability needs to be increased through water use efficiency, fertilizer management and planting methods. During four cropping seasons in 2011–13, alternate wetting and drying (AWD) irrigation was applied in the triple rice production area within An Giang Province, Vietnam. An issue with the application of AWD is the prevalence of acid sulphate soils in the Mekong Delta. Three types of irrigation management were tested; continuously flooded (CF) where the water in the paddy was maintained at 5 cm; AWD where the water level was allowed to fall to 15 cm below the ground surface, at which point the field was irrigated until the water level was at 1 cm above the ground surface (designated−15 cm); AWD where the water level was allowed to fall to 30 cm below the ground surface before irrigation until the water level was at 1 cm above the ground surface (designated −30 cm). Two further experiments were also undertaken which examined the planting method (transplantv. direct sowing) and phosphorus rate on rice yield. There was no effect on yield caused by P fertilizer rate and irrigation management in any year, and there was no significant effect on soil pH or salinity caused by irrigation management. Overall net profitability was greatest for the AWD treatments because of the reduction in pumping and labour costs in the dry season. Transplanted rice improved yields, but the labour cost reduced overall profitability. The study shows that AWD (−15 cm) can be safely applied in acid sulphate soil areas within the triple rice areas of An Giang Mekong Delta and saved at least 0·27 of total irrigated water quantity used during three of the six cropping seasons. The increased profitability of the AWD rice production system will help to improve the resilience of triple rice cropping systems to future water scarcity.

Các bài báo khác
Số tạp chí 8(2016) Trang: 169-176
Tạp chí: International Journal of Computer and Electrical Engineering (IJCEE)
Số tạp chí 84(2016) Trang: 22-25
Số tạp chí 84(2016) Trang: 56-62
Tạp chí: JIRCAS Working Report
Số tạp chí 2320–737X Volume 6, Issue 6 Ver. II(2016) Trang: 38-48
Tạp chí: IOSR Journal of Research & Method in Education (IOSR-JRME)
Số tạp chí Vol. 6, No. 1(2016) Trang: 1-8
Tạp chí: International Journal of Bioscience, Biochemistry and Bioinformatics
Số tạp chí E99-d, No. 1(2016) Trang: 187-196
Tạp chí: IEICE-Transactions on Information and Systems
Số tạp chí 117(2016) Trang: 756-767
Tạp chí: New Library World
Số tạp chí 0(2016) Trang: 0
Tạp chí: British Journal of Educational Technology

Vietnamese | English

Vui lòng chờ...