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本研究探讨闽南甜橙主栽品种(印子柑、改良橙、伏令夏橙)叶片营养元素含量的适宜范围。结果表明,各品种不同地点、年份的叶片元素含量存在明显差异,而三个甜橙品种间叶片元素含量未见稳定的差异,因此,作者认为,可建立三个甜橙品种通用的叶片营养元素含量适宜标准。统计分析表明:其叶片毛素含量的变异系数,大量元素以氮、磷较小,镁、钾、钙较大;微量元素多高于大量元素。本文初步提出甜橙于片元素的适宜含量:氮2.50％～3.30％,磷0.12％～0.18％,钾1.00％～2.00％,钙2.00％～3.50％,镁0.22％～0.40％,铜4.0～18.0ppm,锌25.0～70.0ppm,锰20.0～100.0ppm,铁90.0～160.0ppm,硼25.0～100.0ppm。大量元素含量的适宜比值为氮:磷:钾:钙:镁=1:0.05:0.5:2:0.95:0.11。上列指标可供甜橙营养诊断指导合理施肥之参考。
This study was to explore the appropriate range of nutrient elements content in the main cultivars of sweet orange in Minnan (Prunus mongolica, modified orange and Vladimir summer orange). The results showed that there were significant differences in the leaf element contents of different varieties and locations in different years, but there were no stable differences in the leaf element contents among the three sweet orange varieties. Therefore, the authors believe that the common leaf nutrient elements of three sweet orange varieties Suitable content standards. Statistical analysis showed that the coefficient of variation of the leaf villus content, the large amount of elements nitrogen and phosphorus smaller, magnesium, potassium and calcium larger; trace elements more than a large number of elements. In this paper, the appropriate content of sweet orange in flaky elements was proposed: 2.50% -3.30% nitrogen, 0.12% -0.18% phosphorus, 1.00% -2.00% potassium, 2.00% -3.00% calcium, 0.22% -0.40% magnesium, 25.0 to 70.0 ppm of zinc, 20.0 to 100.0 ppm of manganese, 90.0 to 160.0 ppm of iron, and 25.0 to 100.0 ppm of boron. The appropriate ratio of the content of a large number of elements is nitrogen: phosphorus: potassium: calcium: magnesium = 1: 0.05: 0.5: 2: 0.95: 0.11. The above indicators for the diagnosis of sweet orange nutrition fertilizers guide the guidance.