Attenuation of solar ultraviolet radiation and analysis of attenuators in typical macrophytic, algal lake zones of Lake Taihu Canopy Development,Light Interception and Grain Yield in High Yielding Wheat Varieties in Beijing District Biological and optical properties of Meiliang Bay in Lake Taihu Attenuation of photosynthetically available radiation (PAR) in Meiliang Bay under different winds and waves Seasonal characteristics of the diffuse attenuation coefficient of Meiliang Bay waters and its primary contributors MASS ATTENUATION COEFFICIENTS, MASS ENERGY-ABSORPTION COEFFICIENTS AND ABSORBED DOSE CHANGE COEFFICIENTS OF CROP SEEDS