Modified larch tannin was prepared by grafting copolymerization and sulfoalkylation, and successfully used as retanning agent, possessing good water solubility and enhanced penetration rate.

利共聚和磺烷基化的方法对落叶松单宁改性。

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，光合作能力较强，不发生光抑制，而兴安落叶松幼苗较耐阴。