抚育间伐对大兴安岭用材林生态经营的影响

摘要

With the timber forest in the Daxing ’ an Mountains , we set eight test areas in the timber forest to carry out light , mid-dle and serious tending felling and used the grey system to make the comprehensive evaluation of biodiversity , soil fertility and soil respiration after tending felling .We built the best ecological management mode for the scientific management of tending felling.The middle tending with the intensity of 20.86%has the promoting effect on biodiversity , soil fertility and soil respiration , and is benefit for the growth of standing forest .%以大兴安岭用材林为研究对象，设置8个试验区，进行轻度、中度、重度抚育间伐；应用灰色关联，综合评价抚育间伐对林内生物多样性、土壤肥力以及土壤呼吸情况的影响，优化出大兴安岭用材林最佳的生态经营模式。结果表明：抚育强度为20．86％的中等强度抚育方式，对林地生物多样性、土壤肥力、土壤呼吸情况有促进作用，有利于林分的生长。