L~-1 had more remarkable influence to the content of chl. The contents of chl a b of the former were respectively 17.68% and 15.42% higher than the contrast of the same period.

• L~(-1)的两个处理对盾叶薯蓣叶片叶绿素的含量影响最为显著；前者叶绿素a、b的含量分别比同期对照高出17.；68%25和13