福眼龙眼叶片营养元素适宜含量的研究
STUDY ON THE OPTIMUM RANGE OF THE MINERAL ELEMENT CONTENTS IN THE LEAVES OF FUYAN LONGAN
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摘要: 本文探讨了福建栽培面积最大的龙眼品种福眼的叶片营养元素适宜含量。研究结果表明,不同地点、年份对福眼叶片元素含量有明显的影响。故在确定适宜营养指标时,应多点、多年取样分析。统计分析表明,福眼叶片各元素含量的变异系数差异较大。在确定适宜范围时,应综合考虑这种变异特点及某些因素的可能影响,使所提出的营养指标更具有实用性。本研究初步提出的丰产福眼夏梢叶片营养元素适宜含量:氮1.50~2.00%,磷0.10~0.17%,钾0.40~0.80%,钙0.70~1.70%,镁0.14~0.30%;其叶片氮、磷、钾、钙、镁的适宜比例为1:0.08:0.34:0.69:0.13。上述指标可供指导福眼合理施肥之参考。Abstract: The present experiment was carried out in south Fujian during 1985-86,in order to find out the optimum range of the major nutrient contents in the leaves of Fuyan longan,which variety covered the largest cultivated area in Fujian.It was found that the amount of the mineral elements in the leaves of the same cultivar was affected by different localities and years for sampling.Thus,representative foliar samples should be collected at more orchards and in more years so as to define diagnostic criteria. The results from the statistical analysis indicated that the difference in the variation coefficients of the element contents in the leaves was pronounced, so that this characteristic of different variation coefficients and possible factors that affect the nutrient diagnosis of the leaves should be comprehensively considered to achieve better results.The preliminary study suggested that the values of the optimum range of the mineral elements in the leaves of summer shoots of Fuyan longan were : N 1.5-2.0%, P 0.10-0.17%, K 0.40-0.80%, Ca 0.70-1.70%, Mg 0.14-0.30 %; and that the optimum ratio between the amounts of elements in the leaves was N : P : K : Ca : Mg= 1 : 0.08 : 0.34 : 0.69 : 0:13.The above diagnostic criteria may provide the parameters of fertilizer guide for Fuyan longan.
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[4] Embleton, T,W,et al,1973,leaf analysis as a diagnostic tool and guide to fertilization,In:Reuther, W(ed)The Citrus Industry, 3:183~210,Univ, Calif, Div, Agr, Sci,,Berkeley,Calif.
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