作物的化学诊断是作物营养诊断的有效手段之一。但化学速测结果必须和作物长势长相的观察,土壤及其环境因素的现场鉴定,耕作和施肥历史的调查了解,特别是和当地贫下中农的经验相结合,切忌孤立地作出判断。群众性的作物营养诊断法丰富多彩,操作手续繁简不一,精度也各不相同,使用时各有优缺点,在生产上各有其用途。各地应该根据各自的条件和经验进行选择。 The chemical diagnosis of crop is one of the effective methods for crop nutrition diagnosis. However, the results of chemical tests must be observed in relation to the growth of the crop, on-site identification of soil and its environmental factors, investigation of the history of farming and fertilization, and especially in combination with the experience of the poor and middle-level peasants in the region. Avoid judging in isolation. Mass crop nutrition diagnosis method is rich and colorful, the operating procedures are varied, the accuracy is also different, each has its own advantages and disadvantages, its use in production. Everywhere should choose according to their own conditions and experience.