Photosynthetic Physiological and Ecological Characteristics of Betula platyphylla-Quercus liaotungensis Mixed Forests in Ziwuling Forest Area The function of microbial fertilizer and its application prospects Progress in Studies on Plant Responses to Elevated CO2 Study on Several Hydrological and Ecological Characteristics of Hippophae rhamnoides in the Loess Hilly Region Impact of herbicides on physiology and ecology of hydrophytes Achievements and Developments of Ratooning Rice in South of China Study on adaptability of physiological ecology of Quercus liaotungensis seedlings under soil drought