作物正常生长发育需要吸收各种营养元素,如果缺乏任何一种营养元素,其生理代谢就会发生障碍,作物不能正常生长发育,使根、茎、叶、花或果实在外形上表现一定的症状,将会引起农作物减产,通常称为农作物的缺素症。要知道作物缺素症,一是进行测土分析;二是作肥效试验,安排使用一定量的一种化肥,看增产效果,增产特别明显的就说明土壤中缺乏这种元素;三是看作物生长的外观表现。 Crop growth and development need to absorb a variety of nutrients, if the lack of any one nutrient element, the physiological metabolism will be obstacles, the normal growth and development of crops, so that the root, stem, leaf, flower or fruit in the appearance of certain symptoms , Will result in a reduction of crops, often referred to as crop deficiency. To know the lack of crop disease, one is to soil testing; the second is for the fertilizer efficiency test, arrange the use of a certain amount of a fertilizer to see the yield effect, increase production is particularly evident on the lack of such elements in the soil; Third, look at the crop The appearance of growth.