The Protective Effect of Phosphate Buffer on SO2 Harmed Wheat Seedling Effect of phosphate buffer on membrane lipid peroxidation of plants and its relation to sulphurous acid harm Study on the Phosphate Buffering Capacity and Fertiphos Requirement of Red Soils under Chinese Fir Stand Phosphate Buffers Effect on Protective Enzyme System and Relationship of Enzyme System with SO2 Pollution in Wheat Seedlings Study on effect of pH on rectum permeability of active ingredients in Reduning suppositories in vitro