Studies on the Chemical Constituents of the Herb Lysimachia christinae Hance Preliminary study on the relation between potassium chloride suppressing corn stalk rot and soil microorganism characteristics Effect of different K sources and rates on the yield and quality of cucumber Effects of Petroleum Ether Extract of Peucedanum praeruptorum Dunn on Rabbit Trachea Smooth Muscles Effects of Saponins from Stems and Leaves of Panax quinquefolium L.on Contraction of Rabbit Aortic Strips