【摘要】 营造马尾松混交林被认为是提高马尾松人工林的生产力和生态服务的理想方法，但马尾松混交林的生产力是否具有超产效应及其影响因素目前仍不清楚。为此，通过收集已报道的26篇文献中50个马尾松混交林林分和树种水平的总生物量及各器官生物量数据，分析马尾松混交林的超产效应及其影响因素。结果表明：整体上，马尾松混交林的乔木层生物量和地上生物量均显著高于纯林。林分水平乔木层生物量超产44.8%，地上生物量超产49.4%，树种水平马尾松总生物量超产31.3%，地上生物量超产36.9%。混交林中马尾松树高和胸径相比纯林也得到了提高。与纯林相比，混交林中马尾松的树枝生物量分配增加，根生物量分配和根茎比减小，树高/胸高断面积比减小。同时，马尾松混交林的混交效应与林龄呈边缘显著正相关，但与初植密度、混交比例、保留密度、气候因子、小地形等因素均没有显著关系。由meta分析可得，混交林可以提高马尾松生物量的超产效应，促进马尾松的生长发育，优化马尾松林的林分结构。更多还原

【Abstract】 Building the mixed forests ofPinus massonianais considered to be an ideal way to improve the productivity and ecological services of its plantation, but it is not clear whether the mixed forests of Pinus massonianacan yield higher productivity compared to monocultures( overyielding) and its influencing factors. For this reason, the overyielding and its influencing factors ofPinus massoniana mixed forests were analyzed by collecting the total biomass and organ biomass data of 50 mixed forests in 26 literatures. The results showed that, on the whole, the tree layer biomass and aboveground biomass ofPinus massonianamixed forest were significantly higher than those of pure forests. The biomass of the tree layer at the stand level gained overyielding by 44. 8%, the aboveground biomass by 49. 4%,the total biomass ofPinus massonianaat the tree level by 31. 3%, and the aboveground biomass by36. 9%. The height and DBH ofPinus massonianain the mixed forests were also higher than those in the pure forests. Compared with the pure forests, the branch biomass distribution ofPinus massoniana in the mixed forests increased, the root biomass allocation and the root-stem ratio decreased, and the tree height/breast height cross-sectional area ratio decreased. At the same time, the overyielding of Pinus massoniana mixed forests was positively correlated with forest age, but not with initial planting density, mixed proportion, retention density, climatic factors, small topography and other factors. According to meta analysis, mixed forest can help overyielding the Pinus massoniana biomass, promote its growth and development and optimize its stand structure.更多还原