摘要
对55年生广西苍梧县天洪岭林场土贡站土贡种源马尾松人工林的生物量及生产力进行研究。结果表明,土贡种源马尾松不同径阶间单株各器官生物量的分配规律均为地上部分:树干>大枝>小枝>叶;地下部分:根蔸>粗根>中根>细根;生物量在树干上的累积增加量最明显;土贡种源马尾松人工林乔木层的总生物量为468.64 kg/株,其中,树干生物量最大,为343.14 kg/株,其次是根87.08 kg/株,叶的生物量最小,为6.10 kg/株。乔木层年净生产力为8.52 t/(hm2·a),其中,树干净生产力为6.24 t/(hm2·a),占比为73.22%;根系净生产力为1.58 t/(hm2·a),占比为18.58%;各器官净生产力从大到小排序为树干>根系>大枝>小枝>叶。
This study researched biomass and productivity of 55-year native provenance Pinus massoniana Lamb. The results showed that the allocation pattern of biomass in each organ in single tree which was between different diameter classes of native provenance P. massoniana in above-ground part was trunk 〉large branches〉 twigs 〉leaves; the below-ground part of the single tree was root stumps〉 coarse roots 〉medium roots〉 fine roots. It was most obvious that the biomass accumulation in the trunk. The total biomass of tree layer in P. massoniana plantation was 468.64 kg/plant, the maximum biomass was in the trunk, 343.14 kg/plant, the second was root,87.08 kg/plant, and the lowest was leave, 6.10 kg/plant. The annual net productivity of tree layer was 8.52 t/（hm2·a）, the net productivity of trunk was 6.24 t/（hm2·a）, the net productivity of root was 1.58 t/（hm2·a）. The order of the organs was trunk root large branches twigs leaves.
出处
《山西农业科学》
2015年第10期1247-1251,共5页
Journal of Shanxi Agricultural Sciences
基金
广西研究生教育创新计划项目(YCB2015016)
广西大学大学生创新课题(201410593197)
关键词
马尾松
土贡种源
生物量
生产力
Pinus massoniana
provenance in Tugong
biomass
productivity
