Dynamics of soil active organic matter in Chinese fir plantations Relationship between Germinating of Axillar Buds at the Base Node and Main Stem Removing Time in Annual Glycine soja Sieb.et Zucc. Variations of Water-Soluble Carbohydrate Contents in Different Age Class Modules of Leymus chinensis Populations in Sandy and Saline-Alkaline Soil on the Songnen Plains of China Studies on Contents of Free Amino Acids and Wateter-soluble Carrbohydrates in Safflower Plant atDifferentt Stages of of Growth Effects on water-soluble carbohydrate of Artemisia frigida under different defoliation intensities