不同坡位5a生杉木、厚朴及马褂木混交林生物量分配格局

对顺昌县5a生杉木、厚朴及马褂木地上部分和地下部分生物量及其分配率进行了调查分析。结果表明：从该混交林的生长量来看,不同坡位各树种平均胸径、平均树高均体现为下坡位生长量〉中坡位生长量〉上坡位生长量;从生物量来看,下坡位各树种平均木单株总生物量最高,其次为中坡位,上坡位各混交树种林分总生物量最低;就各器官生物量分配率而言,不同坡位杉木和厚朴各器官生物量分配率表现为干部〉叶部〉枝部,而马褂木各器官生物量分配率均表现为干部〉枝部〉叶部;不同混交树种骨骼根、大根、中根、小根及细根生物量均表现为下坡位最高,中坡位次之,而上坡位最低。

Biomass and Distribution Rate of 5-year Mixed Forest of Cunninghamia Lanceolata,Magnolia off Ficinalis and Liriodendron Chinense under Different Slopes

The biomass of above and under ground and its distribution rate were studied in Fujian Shunchang 5-year mixed forest of Cunninghamia lanceolata,Magnolia officinalis and Liriodendron chinense.The results show that from the indicators of mixed forest growth,each slope of average diameter at breast height and average tree height were reflected as downslope > midslope > upslope.From the point of the biomass,the average downhill biomass is the hightest,followed by the middle slope,uphill is the lowest.According ...