Cucumber was cultured in open-top CO2 controlled chambers to study the interactive effects of elevated CO2 and potassium (K) on soil quality chemical properties. The results indicated that N and P nutrient contents in soil decreased at elevated CO2 and higher K supply, and K nutrient content increased with the increase of K supply. Higher K supply (200 and 300 mg/kg)and elevated CO2 reduced NO3-, PO43-, Ca2+ and Mg2+ contents in soil. Therefore, in the future elevated environment higher K supply can improve the nutrient uptakes of crop from secondary salinity soil and reduce salt ions accumulation.
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袁会敏,周健民,段增强,王火焰. CO2浓度升高与增施钾肥对土壤化学性质的影响[J].土壤,2010,42(1):71-75. YUAN Hui-min, ZHOU Jian-min, DUAN Zeng-qiang, WANG Huo-yan. Effects of elevated CO2 and potassium on soil chemical properties[J]. Soils,2010,42(1):71-75