松、杉树含有树脂酸及挥发性气味,对香菇等食菌的菌丝有强烈的抑制作用,但松、杉树含有40%以上的木质素,而香菇是主要利用木质素的菌类。为此,我们于1973年开始试验,先排除其木屑中的脂酸及刺激性气味,然后再行培制香菇菌种,取得了成功。并在广东的龙川、连平和江西的寻邬、定南、安远等县得到了推广,1976～81年春共供应 Pine, fir trees contain resinous acids and volatile odor, mushrooms and other bacteria mycelium has a strong inhibitory effect, but pine, fir trees contain more than 40% of the lignin, and mushrooms are the main use of lignin fungi. To this end, we started the experiment in 1973, first ruled out the fatty acids in wood chips and irritating odor, and then re-cultivated mushroom strains, and achieved success. And in Guangdong’s Longchuan, Ping and Jiangxi Xun Wu, Dingnan, Anyuan and other counties have been promoted, the total supply of spring 1976 ~ 81