不同造林地马大杂交相思人工林生物量及分配格局差异  

Differences of Biomass and Distribution Pattern of Acacia mangium×A.auriculiformis Plantation Under Different Afforestation Sites

作　　者：陈锦祥 CHEN Jin-xiang(Fujian Zhangpu Xiacai State-owned Protection Forest Farm,Zhangzhou,Fujian 363214)

机构地区：[1]福建省漳浦下蔡国有防护林场,福建漳州363214

出　　处：《安徽农业科学》2025年第5期106-110,共5页Journal of Anhui Agricultural Sciences

基　　金：福建省林业科技项目(ZMGG-0709)。

摘　　要：[目的]探究2种造林地马大杂交相思(Acacia mangium×A.auriculiformis)人工林林分生物量及其分配格局。[方法]以滨海沙地和丘陵山地7年生马大杂交相思人工林为研究对象,通过生物量收获法分析乔木层地上部分及根系生物量及其分配格局。[结果]丘陵山地马大杂交相思人工林胸径、树高、枝下高、冠幅、高径比分别比滨海沙地提高了53.81%、97.76%、67.83%、22.30%、21.88%;丘陵山地马大杂交相思人工林地上部分各器官生物量表现为树干>枯枝>活枝>树叶,而滨海沙地表现为树干>活枝>枯枝>树叶;丘陵山地马大杂交相思人工林枯枝、树干及树叶生物量高于滨海沙地,但活枝生物量低于滨海沙地。丘陵山地马大杂交相思人工林根生物量整体大于滨海沙地,滨海沙地各径级根生物量分配表现为根桩>粗根>大根>细根>中根>小根,丘陵山地表现为根桩>粗根>大根>中根>小根>细根。丘陵山地马大杂交相思人工林土壤物理性质与各器官生物量均无显著相关性(P>0.05);滨海沙地马大杂交相思人工林土壤容重、非毛管孔隙度分别与树干及根桩生物量呈显著正相关(P<0.05)。[结论]丘陵山地更适宜马大杂交相思的正常生长,有利于该树种生长发育。[Objective]To explore the stand biomass and distribution pattern of Acacia mangium×A.auriculiformis plantation in two kinds of forest land.[Method]Taking 7-year-old A.mangium×A.auriculiformis plantation in coastal sandy land and hilly area as the research object,the aboveground part and root biomass of tree layer and its distribution pattern were analyzed by biomass harvest method.[Result]The results showed that the DBH,tree height,under-branch height,crown width and height-diameter ratio of hilly and mountainous A.mangium×A.auricul-iformis plantation were 53.81%,97.76%,67.83%,22.3%and 21.88%higher than those of coastal sandy land,respectively.The biomass of some organs in the hilly and mountainous A.mangium×A.auriculiformis plantation was trunk>dead branch>living branch>leaf,while that in coastal sandy land was trunk>living branch>dead branch>leaf.The biomass of dead branches,trunks and leaves of A.mangium×A.auricul-iformis plantation in hilly and mountainous areas was higher than that in coastal sandy land,but the biomass of living branches was lower than that in coastal sandy land.The root biomass of A.mangium×A.auriculiformis plantation in hilly and mountainous areas was higher than that in coastal sandy land,and the root biomass distribution of different diameter classes in coastal sandy land was as follows:root pile>coarse root>large root>fine root>middle root>small root.Hilly and mountainous areas showed root pile>coarse root>large root>middle root>small root>fine root.There was no significant correlation between soil physical properties and organ biomass(P>0.05),but there was a significant positive correlation between soil bulk density and trunk biomass(P<0.05).There was a significant positive correlation between non-capillary porosity and root pile biomass(P<0.05).[Conclusion]The hills and mountains are more suitable for the normal growth of A.mangium×A.au-riculiformis,which is beneficial to the growth and development of this tree species.

关 键 词：马大杂交相思 造林地 生物量 分配格局 

分 类 号：S724[农业科学—林木遗传育种]