印度自古以来就有杧果栽培,但迄今关于杧果植株对养分的需要仍然了解甚少。在最近几年,许多种果树都已应用叶片分析法来测定其对养分的需要,但杧果在这方面尚无什么资料。史密斯等虽曾报道过美国佛罗里达州的杧果叶片分析值,但印度却未曾进行过这项工作。本研究试图在控制养分下砂培杧果实生苗,以诱发出几种常量元素特有的营养缺乏症状,从而确定这几种常量元素的下限临界值。 India has had mango cultivation since ancient times, but so far the knowledge of the nutrient needs of mango plants is still poorly understood. In recent years, many kinds of fruit trees have been using leaf analysis to determine their nutrient needs, but there is no information on the fruit in this regard. Although Smith and other reports have reported the United States, Florida, mango leaf analysis, but India has not done this work. In this study, we tried to control the nutrient content of saplings under the control of nutrients to induce the nutritional deficiency symptoms of several kinds of constant elements, so as to determine the lower critical values ​​of these kinds of constant elements.