萌芽杉木、拟赤杨混交效应及生物量分布格局研究

Studies on the Growth Effect and Biomass Distribution Patterns of Sprout Cunninghamia Lanceolata and Alniphyllum Fortunei Mixed Forests

分析比较了16年生萌芽杉木、拟赤杨混交林(3∶1)以及萌芽杉木纯林生长状况、水源涵养功能、林内小气候、生物量分布格局。结果表明:2茬杉木、拟赤杨混交林生长良好,杉木平均树高、平均胸径、单株材积、单位面积总蓄积量,林分总生物量分别为14.59m、14.35cm、0.12307m3/株、229.3657m3/hm2、114.79t/hm2,与杉木纯林比较分别提高8.5%、5.8%、19.3%、22.5%、38.97%。混交林中拟赤杨枝叶生物量分布高度高于萌生杉木,有利于提高光能利用率;根系分布深度相差不大,属浅根系,但2者根系之间不互相穿透和盘结,能充发利用地力,同时混交林改善了林内小气候,林分水源涵养功能也得到提高。

16 years old when,analysis comparison of the mixed forests of sprout Cunninghamia Lanceolata and Alniphyllum fortunei （3 ： 1） and pure forest of sprout Cunninghamia Lanceolata grow status, water conservation functions, microclimate within the forest, biomass distribution pattern. The results showed that： The second crop of the mixed forests grows well of sprout Cunninghamia Lanceolata and Alniphyllum fortunei, The tree average height, average DBH, Individual volume,Total stand Volume, Total stand biomass of Cunninghamia Lanceolata. Are： 14. 59m;14. 35cm;0. 12307m3, 229. 3657m3 . hm-2;1t4. 79t . hm -2, Compared with the pure forest of sprout Cunninghamia Lanceolata were increased 8.5% ;5.8% ;19. 3% ;22.5% ;38. 97%. Biomass of Alniphyllum branches and leaves higher than the fir distribution, helping improve the light use efficiency; Little difference between the depth of root distribution, is a shallow root system, but not between the two roots interspersed with each other and Tangle can be fully made use of forest land utilization. Mixed forest at the same time improve the microclimate, water conservation functions also stand to improve, therefore, the Mixed forests of Sprout Cunninghamia Lanceolata and Alniphyllum fortunei can be a good stand structure formation, can promote the improvement of forest productivity and soil fertility improvement, is should be promoted mixed mode.