Study on the Total Saponin Contents of Different Alfalfa Silages Study on correlations between total saponins content in rhizome or mycorrhizal infection rate of Pairs polyphylla var. yunnanensis and soil factors Relationship of Anatomical Structures of Akebia quinata and Accumulation Part of Triterpenoid Saponins Geographic Variation of Saponins Contents in Sapindus mukorossi Peels from Different Habitats Dynamic Relationships between Structural Characteristic and Saponins Accumulation in Rhizome of Panax japonicus var. major