TAILIEUCHUNG - Alternate wetting and drying (AWD) irrigation - A smart water saving technology for rice: A Review

The agricultural sector faces daunting challenges because of climate change, particularly amidst increasing global water scarcity, which threatens irrigated lowland rice production. By 2025, 15-20 million ha of irrigated rice is estimated to suffer from some degree of scarcity. Rice systems provide a major source of calories for more than half of the world‟s population; however, they also use more water than other major crops. Irrigated lowland rice not only consumes more water but also causes wastage of water resulting in degradation of land. In recent years to tackle this problem, many methods of cultivation have been developed. Among the different methods of water-saving irrigation, the most widely adopted is Alternate Wetting and Drying (AWD) irrigation method. AWD technique has developed by IRRI in partnership with national agricultural research agencies in many countries. Practical implementation of AWD was facilitated using a simple tool called a 'field water tube'. It is an irrigation practice of introduction of unsaturated soil conditions during the growing period that can reduce water inputs in rice without compromising yields. AWD technique can save water requirement up to 20-50% and improve water use efficiency besides reducing greenhouse gas emissions by 30-50%. which have impact on climate change. However, AWD has not been widely adopted, in part, due to the apprehension of yield reductions and hence demands greater efforts from researchers and extension workers. Safe AWD threshold level found to be 5-15cm water fall below surface in field water tube which needs to be validated in different soil types and different climatic conditions. Proper management of water in safe threshold is the foundation of AWD to realize potential yield while saving water. | Alternate wetting and drying (AWD) irrigation - A smart water saving technology for rice: A Review

• Nông nghiệp
• Alternate wetting and drying
• Field water tube
• Water productivity
• Smart water saving technology
• Water saving technology for rice
• Water saving strategy
• Drying technology
• Water saving strategy in rice
• Alternate wetting
• AWD alternate wetting and drying
• Rice varieties
• Dry matter production
• Nutrient uptake
• Puddled soil
• SCMR readings
• LCC ratings
• Nitrogen uptake
• Lowland rice
• Growth parameters
• Low land rice (Oryza sativa)
• Pani pipe
• Water saving technologies
• Water scarcity
• Adoption of alternate wetting
• Constraints perceived by the farmers
• Rabi rice
• Nitrogen levels
• Varied nitrogen levels
• Drying irrigation
• Oryza sativa L
• Grain yield
• Irrigation management
• Drying method
• Crop establishment methods
• Transplanting and direct seeded rice
• Water balance
• Irrigated rice based systems
• Under north IGP
• Less water precision water management approaches
• Nitrogen transformation
• Paddy fields
• Aerobic soil condition
• Nitrate nitrogen concentration
• Irrigation regimes
• Method of water management
• Nitrogen levels on growth
• Water productivity of rice
• Rice production
• Continuous flooding
• Acid sulfate
• Alluvial soil
• Green super rice
• Water management scheme
• Field capacity
• Vietnam Journal of Science and Technology
• Bài viết khoa học
• Tạp chí Khoa học Công nghệ Việt Nam
• Irrigated water management
• Alternate for wetting and drying