经营模式对马尾松天然次生林林下植被生物量及其分布格局的影响

摘要

With the natural secondary forest of Pinus massoniana by different forest management as the research object, the distribution pattern of the biomass of undergrowth vegetation after managing one year was analyzed. The results showed that,under different forest management,the biomass of living vegetation of levels of the natural secondary forest of Pinus massoniana was the highest in shrub layer,the other contribution of total biomass of undergrowth vegetation was litter lay.The total biomass of undergrowth vegetation of Pinus massoniana forest was the highest by treatment method of reserved density of 900 plants per hectare,the lowest by reserved density of 2100 plants per hectare. The biomass of undergrowth vegetation was not high when the reserved density was high or low,this demonstrated that the suitable reserved density could increase the biomass of undergrowth vegetation of the natural secondary forest of Pinus massoniana.%以不同森林经营模式下马尾松天然次生林为研究对象，对经营1年后其林下植被生物量的分布特征进行研究。结果表明：不同经营模式下，马尾松天然次生林下活地被生物量均以灌木层生物量为主，枯落物层生物量对林下植被总生物量的贡献亦大。经营模式为保留密度900株/hm2的马尾松林下植被总生物量最高，而保留密度为2100株/hm2的马尾松林下植被总生物量最低。保留密度过大或过小林下植被生物量都不高，说明适宜的保留密度才有利于提高马尾松天然次生林下植被的生物量。