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Cl 作为植物生活所必需的营养元素,在本世纪的五十年代方获得证实,从其发现顺序来说,Cl 是植物的第16个必需元素,排在微量元素的第7位。但它的量比起其它微量元素则并不算微。首先,植物对 Cl 的需要量是微量元素中需要量最高的,一般认为植物对 Cl 的平均需要量为0.1%,如油棕榈叶中 Cl 缺乏的临界浓度为0.5%;番茄在发生缺乏病的叶片中,1克干物质中含有0.25毫克 Cl,而同等程度 Mo 的缺乏症叶片中,1克干物质中 Mo 的含量只有0.0001毫克。其次,许多植物能大量地
As an essential nutrient for plant life, Cl was confirmed in the 1950s by the century. From its discovery order, Cl is the 16th essential element in plants, ranking the 7th in trace elements. But its amount than other trace elements is not meager. First of all, the plant needs of Cl is the highest demand for trace elements, the average plant is generally considered to be 0.1% of Cl, such as oil palm leaves in the critical concentration of Cl 0.5%; tomato in the absence of disease In leaves, 1 gram of dry matter contains 0.25 milligrams of Cl, while in the same degree of Mo deficiency leaves, the content of Mo in 1 gram of dry matter is only 0.0001 milligrams. Second, many plants can be used in large quantities