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近年来,我国以合理施用化肥,提高其经济和社会效益为目标的各种农业化学服务工作已相继开展,如测土施肥(农资系统),配方施肥(农业系统),推荐施肥(化肥生产系统)等。这些工作都通过不同的途径与方法,获得大体相似的必要基础资料,据此拟订一个适应一定土壤和作物的施肥方案(包括施肥量、施肥时期与施肥方法),向农户提供建议(推荐),或同时配制相应的肥料产品(如专用复肥)供应农户,使施肥方案得以实施。而不论用什么途径和方法形成的施肥方案(或建议),其核心和基础,是适宜施肥量的估算。由于肥料是在施入土壤后,与土壤相互作用过程中供应作物的(即先肥土壤、后肥作物),而作物
In recent years, various agrochemical services in our country, such as soil testing and fertilization (agricultural system), formula fertilization (agricultural system), and recommended fertilization (fertilizer production) have been carried out in order to rationally use chemical fertilizers to improve their economic and social benefits. System) and so on. These works all use different approaches and methods to obtain similar and necessary basic information, so as to formulate a fertilization plan (including the amount of fertilization, the period of fertilization and the method of fertilization) to adapt to certain soils and crops and provide advice to farmers (recommended) Or at the same time the preparation of the corresponding fertilizer products (such as special compound fertilizer) supply farmers, fertilization program to be implemented. Regardless of the ways and means of the formation of fertilization programs (or recommendations), the core and foundation, is an estimate of suitable fertilization. Since fertilizers supply crops (ie fertilize soils and post-fertilizers) after they are applied to the soil and interact with the soil, the crop