Effect of low temperature stress on physiological characteristics of flag leaf and its relationship with grain yield during panicle primordium differentiation stage of early rice Effect of interval sowing on agronomic traits and thermo-toleranceof japonica rice from Northeast China DISTRIBUTION AND TRANSPORTATION OF 14CASSIMILATE LABELEDAT PRELIMINARY HEADING STAGE IN WINTER WHEAT Nutrient components and rumen degradability dynamics of different Bothriochloa ischaemum populations in Shanxi Stomatal or non-stomatal limitation of photosynthesis of spring wheat flag leaf at late growth stages under natural conditions in semiarid rainfed regions Physiological Characteristics of drought-Sensitive and Drought-Insensitive Rice Maintainers at florescence under Drought Stress Fluorescence kinetics of different ecotypes of allelopathic wheat varieties at heading stage Effects of  spacing on the yields and canopy structure of japonica rice at full heading stage. Influences of different degrees of water stress at heading stage on rice yield and osmolytes in leaves and roots Effects of High Temperature Stress at Heading Stage on Pollination and Fertilization of Different Types of Rice Variety Photosynthesis and chlorophyⅡ fluorescence parameters of the reed (Phragmites communis)grown in the hydro-fluctuation belt of Three Gorges Reservoir Area