The roots of Finns tabulaeformis, Platycladus orientalis and Robinia pseudoacacia were wrapped by plastic film, then the dry environment was made.

• 摘要对黄土高原主要造林树种油松、侧柏、刺槐根际进行包埋处理，形成持续干旱环境，测定干旱胁迫条件下树木生理特性的变化和对树木生长的影响。