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微量元素是作物生命活动必需的营养元素。它们有的作为作物有机体的组成,有的具有调节作物生活的功能。它们在植物体内的含量微小,但对有机体
Trace elements are essential nutrients for crop life activities. Some of them have the composition of crop organisms, and some have the function of regulating crop life. They are tiny in the body, but they are organic