近年我国北方人工营造速生林面积增长迅猛。随着速生林生产的发展,新的矛盾也日益凸显。主要表现为前期投入大、生长周期长、效果不明显。为了有效弥补林业见效慢的缺点,发展林下经济成为近年来北方平原林业新的经济模式。食用菌作为一种传统林副产品,非常适合林下间作,而且林下间作食用菌成本低,收益高,在资源保护的同时,可将资源优势转化为经济优势和生态优势。1选择合适的林分选择4~5年生郁闭度在0.7~0.8的人工速生林地(树势偏弱 In recent years, the area of ​​artificial forests growing fast in the north of our country has been growing rapidly. With the development of fast-growing forest production, new contradictions have become increasingly prominent. Mainly for the early investment, long growth cycle, the effect is not obvious. In order to effectively make up for the shortcomings of slow forestry, the development of under-forest economy has become a new economic model of forestry in the northern plains in recent years. As a traditional forest byproduct, edible fungi is very suitable for intercropping, and low cost and high profitability of intercropping edible fungi can transform resource advantages into economic advantages and ecological advantages while protecting resources. 1 Select the appropriate forest selection 4 ~ 5 years canopy density 0.7 ~ 0.8 artificial fast-growing forest (tree potential weak