桦木属(Betula)的树木,为落叶乔木或灌木,生长较快,全世界约有40种,主要分布于北半球。我国有22种,分布广泛。陕西有6种,即红桦、牛皮桦、香桦、白桦、光皮桦、坚桦。木材因树种不同,其构造性质和用途也就不同。为了更好地贯彻执行“按质论价、良材优价”的价格原则,我省调整后的木材价格,按照比质比价的原则 Betula trees, deciduous trees or shrubs, grow rapidly, with about 40 species worldwide, mainly in the northern hemisphere. There are 22 species in our country and are widely distributed. There are 6 species in Shaanxi, namely red birch, birch birch, birch, birch, birch, birch. Due to the different species of wood, its construction and use of different purposes. In order to better implement the “quality by price, good material price” principle of the price of wood in our province after the adjustment, according to the principle of parity