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稻米镉含量超标是确保粮食安全的重大隐患,威胁着人类健康;硒是人体必需元素,遍布人体所有器官,而且与镉有拮抗作用,能促使镉从人体内排泄。民以食为天,为人们提供富含硒而镉含量不超标的大米,已成为目前普遍的饮食新需求。笔者通过3年的试验研究证实,采取“推广撒施钙镁磷肥,晒田排水时撒施石灰,出穗期实施深水管理,破口抽穗期-乳熟期喷施富硒叶面肥”等综合措施,可以确保在镉含量二级背景值(镉含量0.2 mg/kg~0.6 mg/kg)的土壤中生产出食用安全的“富硒而镉不超标”大米。
Excessive content of cadmium in rice is a major hidden danger to ensure food security, threatening human health; selenium is an essential element of the human body, all over the body organs, but also with cadmium antagonism, can promote the excretion of cadmium from the human body. People eat food for the day, providing people rich in selenium and cadmium content does not exceed the standard of rice, has become a new dietary needs. The author through 3 years of experimental research confirmed that the adoption of “promoting the implementation of calcium magnesium phosphate fertilizer, cast aside the lime drainage Shaye, the implementation of deep-water management at the heading, breach Heading - milky selenium spraying foliar fertilizer ”And other comprehensive measures to ensure the safe production of“ selenium-rich and cadmium-free ”rice in the soil with the secondary background of cadmium content (cadmium content 0.2 mg / kg ~ 0.6 mg / kg).