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oak-pine mixed forest
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The investigation on the natural regeneration of oak-pine mixed forest on cutting-blank in Huoditang of Qinling mountain indicated that there are good or better with 4700-10000 younglings per ha and 30004000 arbor-younglings per ha as well as an average height of 2.5-4.0m on the most cutting-blanks, after cutting over the old stands natural regeneration on cutting-blanks is most influenced by the conditions of mother trees, topography, undergrowth, etc. Rational retention of mother trees, protection of...

The investigation on the natural regeneration of oak-pine mixed forest on cutting-blank in Huoditang of Qinling mountain indicated that there are good or better with 4700-10000 younglings per ha and 30004000 arbor-younglings per ha as well as an average height of 2.5-4.0m on the most cutting-blanks, after cutting over the old stands natural regeneration on cutting-blanks is most influenced by the conditions of mother trees, topography, undergrowth, etc. Rational retention of mother trees, protection of younglings from pre-cutting and tending forestcrop from post-cutting can shorten the period of forest management. Oak-pine mixed forest is suitable to small area or strip cutting and the conservation function of water supply by forest for cutting-over should be studied.

对秦岭火地塘松栎混交林皆伐迹地天然更新调查结果表明,松栎混交林皆伐后大多数天然更新良好,14~15年的更新幼树数量可达4700~10000株/ha,其中主要乔木树种为3000~4000株/ha,平均树高为2.5~4.0m;皆伐后天然更新状况与保留母树状况、地形、下木生长状况有密切关系;采伐迹地适当保留母树,保护伐前更新幼树。抚育伐后更新林分,可以缩短森林培育周期。

According to regeneration characteristics, Quercus mongolica forests in Heilongjiang Province could be divided into 5 types:pure oak forest,oak birch forest,oak maple forest,oak pine forest and oak pine mixed forest Their successional trend is from pure oak forest to oak birch forest,oak maple forest,oak pine forest and oak pine mixed forest The diversity of oak forests reflects different successional stages Human...

According to regeneration characteristics, Quercus mongolica forests in Heilongjiang Province could be divided into 5 types:pure oak forest,oak birch forest,oak maple forest,oak pine forest and oak pine mixed forest Their successional trend is from pure oak forest to oak birch forest,oak maple forest,oak pine forest and oak pine mixed forest The diversity of oak forests reflects different successional stages Human activity and other disturbances are responsible for different regeneration characteristics Fire and human activities have increased the dominance of oak forest With community succession,the richness of tree species and relative density of the seedling and sapling of maple and red pine increase and the dominance of mature oak tree and relative density of the seedling and sapling of oak tree decrease The distribution pattern of oak is from clumped to random distribution

通过对黑龙江省 6个地点的天然蒙古栎林的结构和更新特点的分析 ,蒙古栎林可划分为不同特点的蒙古栎群落 ,即纯蒙古栎群落、蒙古栎桦树群落、蒙古栎槭树群落、蒙古栎红松群落和蒙古栎红松混交林群落 ,其演替趋势如下 :红蒙古栎群落、蒙古栎桦树群落至蒙古栎槭树群落、蒙古栎红松群落 ,再至蒙古栎红松混交林群落。蒙古栎群落类型的多样性主要反应群落不同的演替阶段 ,造成蒙古栎群落多样性的原因是人类活动和自然因素作用的结果。随着群落的演替 ,蒙古栎的优势地位逐渐被削弱 ,乔木种类丰富度增多 ,草本种类丰富度增多 ;蒙栎的相对密度下降 ,林内环境由干燥逐渐变中性至较湿润 ;蒙古栎幼苗和幼树在总幼苗和幼树中所占的比例下降 ,耐荫物种如色木槭等的幼苗和幼树所占比例上升 ;在演替过程中 ,蒙古栎分布格局聚集分布的聚集程度逐渐降低 ,并向随机分布的方向发展。

 
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