The new position and far-reaching impact of ecological province construction in our country Analysis of the water footprint of suburban planting in arid lands and determination of suitable farmland scale: a case study of urumqi Photosynthetic response to different irradiances of undergrowth plants in tree-herb plantation Distribution and decomposition dynamics of herb plants in Pengxihewater-fluctuation-zone of the Three Gorges Reservoir Effectiveness of phlb Gene in Crosses between Chinese Spring Tal kr phlb Plants and Agropyron intermedium