一、前言营养诊断的主要任务是通过水稻生长发育的关键时期,采集土壤和植株样品进行测定,查明各生育期的营养状态和土壤供肥强度,及时调整水稻所需的营养元素含量,进行经济有效的合理施肥。它是实现水稻高产稳产低成本的重要手段。水稻营养诊断的方法很多,除了直感法 I. Introduction The main task of nutrition diagnosis is to collect the soil and plant samples for determination during the critical period of rice growth and development, identify the nutritional status of each growth period and soil fertility, and timely adjust the nutrient content required for rice to carry out Economical and effective fertilization. It is an important means to achieve high yield and low cost of rice. There are many ways to diagnose rice nutrition, except for the direct method