摘要
Abstract
Structural characteristics of 49-year-old larch plantation in eastern Liaoning was researched to dis-cuss its naturalization process and then provided guidance for the management.The results showed that larch plan-tation in eastern Liaoning had obvious naturalized phenomenon,which was composed of 3 -14 species,including Larix olgensis,Fraxinus mandshurica,Fraxinus rhynchophylla and other species.In the bottom of slope,the domi-nant species were Larix olgensis and Fraxinus mandshurica,in the middle of slope,Larix olgensis,Fraxinus mand-shurica,Fraxinus rhynchophylla were dominant species,and in the top of slope,Larix olgensis and Fraxinus rhyncho-phylla were dominant species.In larch plantation community,the number of small diameter classes (2-6 cm)tree and big diameter classes(18 -36 cm/34/30)tress were change of gradient of slope position.From the bottom to top,the number of diameter class of 2-6 cm tree was gradually decreased,while they were increased for the num-ber of diameter class 18-36 cm/34/30 tree.In the middle and bottom of slope,Larix olgensis with large-diameter (DBH≥26 cm)was dominant,accounting for 58.6%and 60.0%,respectively.In the top of slope,middle-diam-eter (24 cm≥DBH≥12 cm)trees were dominant,accounting for 66.7%.The diameter class of species renewal under forest mainly was composed of small size tree (DBH <6 cm),like,in the bottom,middle and top of slope, the number of middle size tree (DBH 2cm -6cm)accounted for 96.3%,93.8% and 85.6%,respectively. Therefore,using near natural forest management pattern and constructing stable structure forest with uneven-aged and mixed multi-storied plantation to achieve the optimization of ecological and economic benefits in the future process of forest management is strongly needed.It was early stage of regenerative community formation.关键词
长白落叶松/人工林/结构特征/辽东林区Key words
Larix olgensis/plantation/structure characteristics/Liaoning forest farm分类
农业科技
