[Effects of sprinkler irrigation amount on winter wheat growth, water consumption, and water use efficiency].
In 2006-2008, a field experiment was conducted at the Tongzhou Experimental Base for Water-Saving Irrigation Research, Chinese Academy of Sciences, Beijing, aimed to study the effects of sprinkler irrigation amount on the growth, grain yield, water consumption, and water use efficiency of winter wheat. Different treatments were installed, with the irrigation amounts expressed by the multiples of the evaporation (E) from a standard 20-cm diameter pan placed above winter wheat canopy. The grain yield was the highest in treatment 0.75 E in 2006-2007 and in treatment 0.625 E in 2007-2008. In treatments with irrigation amount less than 0.25 E, winter wheat growth was subjected to water stress, and the yield loss was larger than 25%. The water consumption of winter wheat in the two growth seasons was in the range of 219-486 mm, and increased with increasing irrigation amount. The relationships between the grain yield and the water consumption and water use efficiency could be described by quadratic function. Sprinkler irrigation with an amount of 0.50-0.75 E was recommended for the winter wheat growth after its turning green stage in Beijing area.
College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China. s07101169@cau.edu.cn
Li-Peng
LP
Yu
Guan-Hua
GH
Huang
Hai-Jun
HJ
Liu
Xiang-Ping
XP
Wang
Ming-Qiang
MQ
Wang
D057914:Agricultural Irrigation / Q000379:methods*; D018533:Biomass; D002681:China; D014908:Triticum / Q000254:growth & development* / Q000378:metabolism; D014867:Water / Q000378:metabolism*
D014867:Water