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种植作物一定要施肥,才能使作物生长发育良好,获得高产.但是,肥料施用不当,也常常出现不良的效果.因此,有必要了解作物需要那些矿质元素和各种矿质元素的生理功能,以及作物对矿质元素的吸收和在体内的运转规律等.(一)作物对矿质元素的需要1.作物体内的矿质元素.根据分析结果,虽然植物体内矿质元素的含量不多,一般只占植物体干重的百分之几,但种类却不少,几乎包括自然界存在的全部化学元素.作物体内矿质元素的种类和含量并不是固定不变的,而是随不同种类的作物、不同的生育期、不同的植株部位及不同的栽培环境有很大的变动.如水稻含硅特别多,花生、烟草等
Crops must be fertilized to grow and grow well, but fertilizers are often misused and often have undesirable effects, so it is important to understand the physiological functions of crops that require mineral elements and various mineral elements, as well as crops The absorption of mineral elements and the law of operation in the body, etc .. (A) the need of crops for mineral elements 1. The mineral elements in the crop body According to the analysis results, although the content of mineral elements in plants is small, Heavy but few species, including almost all of the chemical elements that exist in nature.The type and content of the mineral elements in the crop body is not fixed, but with different types of crops, different growth stages, Different plant parts and different cultivation environment have great changes, such as rice is particularly rich in silicon, peanuts, tobacco, etc.