Characteristics of CO2 Flux in a Chinese Fir Plantation Ecosystem in Huitong County, Hunan Province Study on the Relationship between Cochineal and Cacti Inhibiting range and mechanism of the active product of S-5210-6 Advances in studies on transported flux and properties of riverine organic carbon Study on the Influence of Cyanobacterial Growth by UV-C Photocatalytic Oxidation with Nanometric TiO2 Transformation of Barnyardgrass (Echinochloa crusgalli) Root Type Phosphoenolpyruvate Carboxylase Gene into Rice (Oryza sativa) Plants and Their Effects on Photosynthesitic Gas Exchange