摘要
通过调查分析抚顺市清原、新宾两地的核桃楸天然次生林单株结实状况及其树形特征,明确了核桃楸树形因子对结实量的影响,归纳了结实量大的核桃楸林木树形所共有的特征:分枝低,树冠长;冠高比大,0.5以上;冠幅半径大,3.5 m以上;分枝角度大,大于45°,最好达到70°~90°;树冠多层次,层次间能达到1 m左右。
In this paper,through the investigation and analysis of Fushun City Qingyuan,Xinbin two natural secondary forest of walnut tree per plant seed and its characteristics,and clarifies the influence factors on the seed yield of walnut tree,summed up the strong large amount of walnut forest tree common characteristics:low branching,tree crown length;crown ratio is large,more than0.5;crown radius,above3.5m;branching angle,greater than45degrees,the best reached70~90degrees;canopy level a lot,level can reach about1m.
作者
牛兴良
NIU Xingliang(Fushun Forestry Scientific Research Institute, Liaoning Fushun 113008)
出处
《林业科技》
2018年第2期39-41,共3页
Forestry Science & Technology
关键词
核桃楸
结实量
树形
特征
Juglans mandshurica
Seed yield
Characteristics
