植物为了维持生长和生命活动,必须从外界环境中吸取所需的物质,所以只有通过合理施肥维作物提供充足而平衡的养分,才能满足其对营养的要求,以确保植物生产顺利进行。(1)作物必需营养元素的主要生理作用作物生长发所必需的碳、氢、氧、磷、钾、钙、镁、硫、铁、硼、锰、铜、锌、钼、氯营养元素,在作物体内的含量差异十分悬殊,相差可达数倍、数百倍乃至几十万倍。但是尽管数量有多有少,但他们各自都有其特殊作 In order to maintain their growth and life activities, plants must absorb the required substances from the external environment. Therefore, nutrition can be satisfied only if adequate and balanced nutrients are provided through rational fertilization of crops to ensure smooth plant production. (1) Major Physiological Functions of Crop Essential Nutrients Carbon, hydrogen, oxygen, phosphorus, potassium, calcium, magnesium, sulfur, iron, boron, manganese, copper, zinc, molybdenum, Crop differences in the content of the body is very poor, a difference of up to several times, hundreds of times or even hundreds of thousands of times. But despite their size, they each have their own special make