Larix kaempferi Carr. seedlings were more photophilic and had strong photosynthetic capacity, which were not prone to photoinhibition,while Larix gmelinii Rupr. seedlings were more shade-tolerant. 日本落叶松幼苗较喜光，光合作用能力较强，不易发生光抑制，而兴安落叶松幼苗较耐阴。
The difference analysis combined with observation and statistics indicated that the guayule had better suitability.It’s photophil, drought-resistant, infertile-resistant and had unprimitive roots. 利用观察统计及差异性分析结果表明，银胶菊适应性强、喜光、抗旱、耐贫瘠、根系发达，在四川省攀枝花地区能够正常生长和繁育；
