摘要:
本研究探讨我国名柚琯溪蜜柚的叶片元素含量适宜范围.生物统计表明:同一县域内不同地点、年份的叶片元素含量存在明显差异.其叶片大量元素含量的变异系数呈现为,氮、磷较小,镁、钾其次,钙最高;叶片微量元素含量的变异系数多高于大量元素,其中硼、锰更高.文中初步提出丰产琯溪蜜柚叶片元素的适宜含量:氮2.50-3.10%,磷0.14-0.18%.钾1.40-2.20%,钙2.00-3.80%,镁0.32-0.47%,铜8.0-17.0ppm,锌24.0-44.0ppm,锰15.0-140.0ppm,铁60.0-140.0ppm,硼15.0-50.0ppm.上列标准可供琯溪蜜柚营养诊断指导施肥之参考.
Abstract:
The optimum ranges of macro-and micro-clement contents in the leaves of Guanxi Honey Pomelo in south Fujian of China were studied in 1988-1989.The main results are as follows.The amount of macro-and micro-elements in the leaves within the same cultivar was affected by different locations and years of sampling.Furthermore, data from the statistical analysis indicated that the variation coeffecients of N and P contents in the leaves were lower, while that of Mg, K and Ca have been increasing successively.The variation coefficients were higher for most micro-element contents(especially B and Mn)in the leaves than that for macro-element contents.The present study recommends that the values of the optimum ranges of the mineral elements in the leaves of spring shoots of Guanxi Honey Pomelo are N 2.50-3.10%, P 0.14-0.18%, K 1.40-2.20%, Ca 2.00-3.8%, Mg 0.32-0.47%, Cu 8.0-17.0ppm, Zn 24.0- 44.0ppm, Mn 15.0-140.Oppm, Fe 60.0-140.0ppm, B 15.0-50.0ppm.These diagnostic criteria may provide the parameters of fertilizer guide.
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