Journal of Food, Agriculture and Environment

Study on optimal irrigation quota of winter wheat for water-saving and salinity control in coastal saline-alkali soil

Author(s):

Xin-yu Mao ^{1, 2}, Xiao-hou Shao ^{1, 2}*, Wei Li ³, Ting-ting Chang ^{1, 2}, Jie Zhang ^{1, 2}, Zhan-yu Zhang ²

Recieved Date: 2013-06-07, Accepted Date: 2013-09-29

Abstract:

In order to determine optimal irrigation quota of winter wheat for improving coastal saline-alkali soil researches on soil salt leaching, crop yield and irrigation water productivity were conducted from 2010 to 2011 based on different irrigation scheduling in Laizhou Bay, China. Experiment treatments included irrigation times and irrigation amount. The results indicated that: (1) soil salinity decreased with increase of irrigation times and quota; (2) winter wheat yield was positively related to irrigation water quota, and the relationship between yield (y) and irrigation water quota (x) could be described by the quadratic equation y = -17.055 + 3.002x - 0.005x²; (3) irrigation water productivity got decreased as the irrigation quota increased. Soil desalination rate and winter wheat yield in T3 were higher than those in T1 and T2 when irrigated with three times during the crop growth stage. The optimal irrigation scheduling was irrigation in stage of sowing (750 m³/hm²), jointing (1200-1500 m³/hm²), heading (1125-1500 m³/ hm²) and milking (750 m³/hm²) with total irrigation quota 4125-4500 m³/hm² when irrigation with four times considering soil desalination rate, crop yield and irrigation water productivity. The optimal annual irrigation quota for winter wheat was 4500 m³/hm² according to this experiment.

Keywords:

Soil salt content, desalination rate, yield, winter wheat, irrigation water productivity, irrigation quota

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 1939-1943

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