[An overview on theoretic research of high efficient water use in agriculture].
High efficient water use in agriculture includes water-saving irrigation and dryland farming, its core being to increase use efficiency and benefit of natural precipitation and irrigation. Each of measurement methods of field evapotranspiration has its advantages and disadvantages. Modified Penman and Penman-Monteith formulae were recommended to calculate the reference crop evapotranspiration by FAO one after another. Jensen and Blank models had a wide use in crop water production function. Recent achievements of appropriate soil moisture and lower limit of soil drought indices provided an important basis of soil physics for agricultural water supply of low quota. The influencing sequence of water stress on different physiological processes correlated with yield formation was in order of cell stretch > stoma movement > transpiration > photosynthesis > matter transfer. Non-severe drought could facilitate matter transfer. Field irrigation research has turn to deficit irrigation, regulated deficit irrigation and controlled alternative irrigation from traditional full irrigation. In the future, such researches as interfaces, soil water dynamics, biological water-saving and water stress would be deeply conducted in high efficient water use theory in agriculture.
Du
Yaodong
Y
Guangzhou Institute of Tropical and Oceanic Meteorology, Guangzhou 510080, China. yddu@grmc.gov.cn
Song
Lili
L
Liu
Zuoxin
Z
D000383:Agriculture; D012987:Soil; D014881:Water Supply
D012987:Soil