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A RESEARCH FOR THE OCCURENCE OF ANOPLOPHORA GLABRIPENNIS (MOTSCHULSKY) IN THE POPLAR INTENSIVE MANAGEMENT PLANTATION A study on the growth and decline and the continued development of plant community of Shapotou national protected region in Ningxia An Analysis on Number Growth and Decline of Populations and the Interaction of Lolium Perenne and Trifolium Repens in Middle Mountain Mixture Pasture in Subtropical Region of China