我们曾提出过一套花生营养诊断的叶片分析方法。但应用分析结果来指导施肥时,则首先要解决花生植株的需肥次序问题。对此,本文介绍元素指数法。 所谓元素指数,就是表示植株对某一营养元素的需要强度。负指数越大,植株需要该元素的强度也就越大;反之,正指数越大,植株需要该元素的强度就越小,有时过剩。当指数趋于零或接近于零时,该元素与其他元素处于平衡状态中, We have proposed a set of blade analysis methods for peanut nutrition diagnosis. However, when applying the analysis results to guide fertilization, we must first solve the problem of peanut plants needing fertilizer order. In this regard, this article describes the element index method. The so-called element index, is the plant that a nutrient element needs intensity. The greater the negative index, the greater the intensity of the element that the plant needs. On the contrary, the larger the positive index, the less intense and sometimes excessive the plant needs. When the index approaches zero or approaches zero, the element is in equilibrium with other elements,