植物的营养状态建全而良好时,植物的生长和产量就高。因此在农林生产过程中,鉴定植物的营养状态是很有意义的。营养状态的鉴定,叫做营养诊断。诊断的结果能够对施肥、特别是计划追肥及其他管理措施提供有利的依据。营养诊断的方法大体分以下两种。一、依照养分缺乏症,用肉眼观察植物的形态、色调的变化。二、叶片分析。主要做无机分析,有时 When plants are well-nourished and well-vegetated, their growth and yield are high. Therefore, in the process of agriculture and forestry production, it is significant to identify the nutritional status of plants. Identification of nutritional status, called nutrition diagnosis. The results of the diagnosis can provide a good basis for fertilization, especially for top dressing and other management measures. Nutritional diagnosis methods generally divided into the following two. First, in accordance with nutrient deficiency, with the naked eye observation of plant morphology, color changes. Second, leaf analysis. Mainly do inorganic analysis, sometimes