“民以食为天,食以安为先,万物土中生”。土壤是中华民族赖以生存、兴国安邦的基础资源。随着资源约束趋紧、环境污染严重、生态系统退化、粮食数量与质量安全问题频发,社会对 “People eat the sun, food safety first, everything in soil ”. Soil is the basic resource for the Chinese nation to survive and rejuvenate the country. With the tightening of resource constraints, serious environmental pollution, ecosystem degradation, frequent occurrence of food quantity and quality and safety problems,