兰竹荔枝叶片营养元素适宜含量的研究

本研究旨在探讨福建荔枝最重要品种兰竹的叶片营养元素适宜含量。统计分析表明,不同地点、年份对同一品种叶片元素含量存在明显的差异;荔枝叶片含氮量变异系数最小,并按磷、镁、钙、钾依次增大。本研究初步提出的丰产兰竹荔枝秋梢叶片营养元素适宜含量为:氮1.5—2.2％,磷0.12—0.18％,钾0.7—1.4％,钙0.3—0.8％,及镁0.18一0.88％;其叶片氮、磷、钾、钙、镁的适宜比例是1:0.08:0.57:0.30:0.12。上列指标可供荔枝营养诊断指导施肥之参考。

PRELIMINARY STUDIES ON THE OPTIMUM RANGE OF LEAF MINERAL ELEMENT CONTENTS IN PRODUCTIVE "LANZHU" LITCHPRELIMINARY STUDIES ON THE OPTIMUM RANGE OF LEAF MINERAL ELEMENT CONTENTS IN PRODUCTIVE "LANZHU" LITCH

The results regarding the optimum range of leaf major nutrient element contents of the most important variety of litchi('Lanzhu')cultivated in Fujian province were as follows:Our statistical analysis indicated that the amount of leaf mineral elements within the same cultivar was affected by different localities and years for sampling.Furthermore,data from our two-year studies showed that the variation coefficient of the leaf N content was the lowest,while that of P,Mg,Ca and K has been increasing successively.The preliminary studies suggested that the value of optimum range of autumn shoot leaf mineral elements in productive 'Lanzhu' litchi were:N 1.5-2,2%,P 0.12-0.18%,K 0.7-1.4%,Ca 0.3-0.8%,Mg 0.18-3.38%,and the optimum ratio between the amount of elements in leaves was N:P:K:Ca:Mg=l:0.08:0.57:0.30:0.12.The above diagnostic criteria may provide the parameters of fertilizer guide for 'Lanzhu' litchi.The results regarding the optimum range of leaf major nutrient element contents of the most important variety of litchi('Lanzhu')cultivated in Fujian province were as follows:Our statistical analysis indicated that the amount of leaf mineral elements within the same cultivar was affected by different localities and years for sampling.Furthermore,data from our two-year studies showed that the variation coefficient of the leaf N content was the lowest,while that of P,Mg,Ca and K has been increasing successively.The preliminary studies suggested that the value of optimum range of autumn shoot leaf mineral elements in productive 'Lanzhu' litchi were:N 1.5-2,2%,P 0.12-0.18%,K 0.7-1.4%,Ca 0.3-0.8%,Mg 0.18-3.38%,and the optimum ratio between the amount of elements in leaves was N:P:K:Ca:Mg=l:0.08:0.57:0.30:0.12.The above diagnostic criteria may provide the parameters of fertilizer guide for 'Lanzhu' litchi.