柞树又具有超强的保水保肥功能。

The oak tree has the supper strong function of water and fertilizer conservation.

这是挑战的柞树美化环境，还可以刺激和乐趣。

It is the challenges of oak tree landscaping that also make it exciting and fun.

对近40年生以柞树为主的天然次生林采取不同抚育间伐措施后，定位研究林分凋落物的性质。

After different thinning measures were taken in the 40-year-old nature secondary forest mainly made of oaks, fixed samples were collected to study characteristics of litters.

东北地区的大兴安岭、小兴安岭和长白山区，是中国最大的天然林区，到处是望不到边的红松、落叶松、黄花松等针叶林和白桦、柞树、水曲柳、杨树、榆树等阔叶林。

The Greater Hinggan, the Lesser Hinggan and the Changbai mountain ranges in the northeast are China's largest natural forest areas.