The allelopathy of desert plants Peganum harmala to seed germination and seedling growth of Lycium ruthenicum were studied using biological determination method. The results showed that:( 1) Cauline leaf water immersion of P. harmala restricted seed germination and seedling growth of L. ruthenicum, and increased with improving concentration;( 2) The seedling dry weight and seedling fresh weight were most sensitive to cauline leaf water immersion of P. harmala in seedling morphological indices, followed by f...