Evapotranspiration of Deficit Irrigated Sorghum

摘要

Deficit irrigation has the fundamental goal to increase water use efficiency. Recent deficit irrigation research concluded that the level of irrigation supply should be 60-100% of full evapotranspiration needs in most cases to improve water productivity. The research further indicated that "regulated deficit irrigation" (RDI) was successful in several cases, especially with fruit trees and vines, in not only increasing water productivity but also farm profit. Deficit irrigation is widely used in theSouthern Plains and Columbia Basin in the U.S., regions that are characterized by their limited irrigation capacities.