光照强度60％时，杉木林净光合强度最大，大于或小于60％都不利于光合强度的提高。

When photosynthetic intensity was 60%, net photosynthetic intensity of chinese fir population was the biggest.

youdao

光照强度60％时，杉木林净光合强度最大，大于或小于60％都不利于光合强度的提高。

When photosynthetic intensity was 60%, net photosynthetic intensity of chinese fir population was the biggest.

youdao