水土保持通报2017，Vol.37Issue(5)：176-181,6.DOI:10.13961/j.cnki.stbctb.2017.05.030
山西省油松人工林的生产力及经营潜力
Net Primary Productivity and Management Potential of Pinus Tabulaeformis Forest in Shanxi Province
摘要
Abstract
[Objective] The dynamic variation of net primary productivity of Pinus tabulaeformis forest in Shanxi Province was studied,and the potential for improvement of plantation forest was predicted to provide reference for improving quality of regional forest.[Methods] The regression equation was established using the stratification and harvesting method and the relative growth model.Cumulative method and Thornthwaite Memorial model were used to estimate the actual and potential productivity of the forest.[Results] The productivity of P.tabulaeformis forest increased with the increase of its age and decreased when it evolved into mature period.The actual productivity of P.tabulaeformis forest was 4.462 t/(hm2 · a);The contribution of trees was 72.17％ to the total productivity at young stand.With the increase of age,total biomass got increase,but in the sense of productivity,it got decrease when evolved into late near-mature period.The contribution of herb layer was 21.16％ in the young forest stage,and decreased latterly.On the contrary,the contribution rate of shrub layer increased gradually,which was more than that of the herb layer in the early mature period,when it is critical for structural management.The average potential productivity of forest was 8.422 t/(hm2 · a),implied that there was at least 32％ potential room for improvement.[Conclusion]The potential room of P.tabulaeformis productivity was at least 32 ％,and the primary limiting factor of P.tabulaeformis forest productivity in Shanxi Province was rainfall.关键词
油松林/单木生长方程/净初级生产力/潜在生产力Key words
Pinus tabuliformis/individual tree biomass model/net primary productivity/potential productivity分类
农业科技引用本文复制引用
樊兰英,孙拖焕..山西省油松人工林的生产力及经营潜力[J].水土保持通报,2017,37(5):176-181,6.基金项目
山西省青年科技基金项目“典型林分土—林系统养分耦合机制及限制性营养元素判定”(201601D021115) （201601D021115）
