Principles and approach for lake ecological restoration Analysis on factors affecting net primary productivity distribution in Changbai Mountain based on process model for landscape scale Simulation of temporal-spatial variation characteristics of surface runoff in Changbai Mountain based on process model for landscape scale The Specific Characteristics of Wheat With Polymorphic Canopy Temperature The effects of climate warming on the alpine vegetation of the Qinghai-Tibetan Plateau hinterland Effects of environmental factors on Cd biotoxicity and phytochelatins production in Triticum aestivum Effects of age and environmental conditions on accumulation of heavy-metals Cd and Cu in Tegillarca granosa Effect of Some Environmental Conditions on the Activity of the Nitrate Reductase-Stabi-lizing Factor (NRsf.) INFLUENCE OF ENVIRONMENTAL CONDITIONS ON THE POLLEN VITALITIES OF POPLARS Studies on Relationship between Root Rot on Panax notoginseng Burk.F.H.Chen and Its Environmental Conditions