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配方施肥是我国施肥技术的一项重大改革。它综合运用了现代农业科技成果,根据作物需肥规律、土壤供肥能力与肥料效应,在有机肥为基础的条件下,产前提出氮、磷、钾和各种微肥的适宜用量和比例,实施科学施肥。中国农科院土肥所,集国内外分析仪器及测试经验之长,为配方施肥中土壤养分含量测定,专门研制出TFC—1A 型数字式浓度直读光电比色计。仪器特点1.它是 TFC—1型和 TFC—2型的改进型,采用流通比色池电动进样,不但简化操作、节省样品,而且完全消除了普通比色计的比色池配对误差和拉动时的几何位置误差。
Formulation fertilization is a major reform of fertilization technology in China. Based on the principle of crop fertilizer requirement, soil fertility and fertilizer effect, under the condition of organic manure, the appropriate amount and proportion of nitrogen, phosphorus, potassium and various trace fertilizers are prenatal proposed , The implementation of scientific fertilization. Soil and Fertilizer Institute of Chinese Academy of Agricultural Sciences, domestic and foreign sets of analytical instruments and test of the long, for the determination of soil nutrient content in formula fertilization, TFC-1A digital direct-reading concentration meter. Instrument Features 1. It is an improved version of the TFC-1 and TFC-2 models that uses flow-through cuvette electrokinetic injection that simplifies operation and saves sample while eliminating the cuvette pooling error and Geometrical position error when pulling.