本试验是想通过解剖观察瞭解膠苗在各个生长时期中乳管发达和外界环境的关系。亦即探求有利於橡膠生物合成的外界环境条件。这些条件包括不同的温度、湿度、施肥处理等等。但是关於橡膠植物切片方法至今还存在着困难。就是在切片过程中,如果材料接触到某些有机溶剂(如二甲苯、乙醚等等),则橡膠很易被溶掉。乳管便难以看出。参考文献至今也还没有具体满意的方法。为此,作者企图改变石蜡法中一部份手续,调换溶剂,仍旧进行石蜡埋藏切片。然而对巴西橡膠树幼苗切片却没有能达到目的。祗是对它的老树皮切片能够使 This experiment is trying to understand the dissection through the growth of the gel during each period of development of the relationship between milk and the external environment. That is to explore the external environmental conditions conducive to rubber biosynthesis. These conditions include different temperature, humidity, fertilization treatment and so on. However, there are still some difficulties with rubber plant slicing methods. It is in the slicing process, if the material comes into contact with certain organic solvents (such as xylene, ethyl ether, etc.), the rubber is very easy to be dissolved. Duct will be difficult to see. References have not yet been specifically satisfied with the method. To this end, the author attempts to change the paraffin method in part of the procedure, exchange solvent, still paraffin burial section. However, the seedlings of Brazil rubber tree did not achieve the purpose of slicing. It is only possible to make slices of its old bark