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作物营养诊断是本世纪初开始兴起的一项先进的栽培技术措施,其中以柑桔营养诊断的应用较为普遍,是当前世界上柑桔主产国家的研究和实践的重点项目。同时它还是柑桔生产标准化内容之一,尤其对柑桔优质高产的营养和施肥指标的综合评定、土壤和叶片养分的测试方法和仪器标准以及肥料的分类等问题都有着不可分割的关系。美国于本世纪二十年代就开始了土壤和植物的营养诊断技术的研究。三十年代,法、日、苏等国家也开展了果树营养诊断法的叶分析研究。半个多世纪来,柑桔营养诊断的研究和运用,由测定一般元素发展到测定微量元素;由土壤和植株速效养分的测定发展到全量分析;由主要依据形态观察到应用彩色照相进行诊断。其诊断方法也由运用数
Crop nutrition diagnosis is the beginning of this century, the rise of an advanced cultivation techniques and measures, of which citrus nutrition diagnosis is more common, is currently the world’s major citrus countries in the research and practice of key projects. At the same time, it is also one of the standardization of citrus production. In particular, it is an integral part of comprehensive evaluation of nutrition and fertilization indicators of citrus quality and high yield, soil and leaf nutrient testing methods and instrumentation standards, and fertilizer classification. The United States in the twenties of this century began soil and plant nutrition diagnosis technology research. Thirties, France, Japan, the Soviet Union and other countries also carried out fruit tree nutritional diagnosis of leaf analysis. For more than half a century, the research and application of citrus nutrition diagnosis has been developed from the determination of general elements to the determination of trace elements; the determination of available nutrients in soils and plants has progressed to full-scale analysis; and the application of color photography has been observed mainly from morphological observation. The diagnosis is also by the number of applications