Seed-coating technique has been widely used to prevent the damage caused by diseases and pests and supples nutrient microelements needed for crop growth. 为了防止病虫对播下的种子危害,同时增加种子抗病虫害的能力和增加适合作物生长的微量元素,当前大量采用种子包衣技术。
According to comparing tourism product with tourism demand, the tourism market has serious supples contradiction. 目前,我国旅游产品和旅游需求相比,存在着较为严重的供给矛盾。