Ecologicaladaptability of photosynthesis and water use for Tamarix ramosissima in the southern periphery of Gurbantunggut Desert, Xinjiang THE MECHANISM OF FERTILIZATION IN INCREASING WATER USE EFFICIENCY The differences of water use efficiency (WUE) among three Populus deltoids clones, and the cloning and characterization of related gene, PdERECTA Study on Photosynthesis and Water Use Efficiency in F2 Hybrids of Ryegrass Effect of soil drought on growth and water use efficiency characteristicsof four native gramineous grasses in Loess Plateau RELATIONSHIP BETWEEN CANOPY TEMPERATURE WITH GRAIN YIELD AND WATER USE EFFICIENCY IN VARIOUS GENOTYPES OF WINTER WHEAT The changes of photosynthetic rate and transpiration rate of maize seedling under soil progressive drought Study on Stable Carbon Isotopic Composition of Populus nigra L.Gene Resource Threshold Effect of Photosynthesis in Forsythia suspense to Soil Water and its Photosynthetic Productivity Grading in Spring and Summer