Abstract
Water and ion balance in a corn field in the semi-arid region of the upper Yellow River basin (Inner Mongolia, China) was analyzed with special reference to transpiration stream and selective nutrient uptake driven by the crop canopy. During the crop development stage (June 7 to July 17, 2005), crop transpiration and soil evaporation were evaluated separately on a daily basis, and concentrations of NO3−, PO43−, K+, Na+, Ca2+, Mg2+ and Cl− ions in the Yellow River water, irrigation water, ground water, soil of the root zone and xylem sap of the crop were analyzed.
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