Effects of NaCl stress on seed germination and seedling physiological characteristics of Astraglus membranaceus Effects of NaCl stress on seed germination and seedling physiological characteristics of Astraglus membranaceus Study on Germination Characteristics and Germination Rate Enhancement of Saposhnikovia divaricata Seeds Effects of winter broad irrigation on the vigor and pathogenicity of sunflower sclerotia in soils