不同经营模式杉木林的生物量研究

为揭示不同营林模式对杉木林生物量分配格局的影响，作者以不同林龄的杉木纯林、杉木×马尾松混交林和杉木×枫香混交林为对象，研究了其乔木层生物量分配格局，结果表明：在22年生杉木林下套种马尾松和枫香，经18年培育之后，与40年生杉木纯林相比，林分总生物量无显著差异，但林分净生产力得到一定程度的提高，尤其以林下套种阔叶树种枫香的样地提高更为明显，不同营林模式乔木层生物量的空间分配皆表现为千〉根〉枝〉叶，干器官的生物量在总生物量中占较大比重，并随着林龄的增加而逐渐增加，混交林可有效提高林分地上和地下部分生物量和生产力，改善其生物量分配格局，提高森林对空间的利用率。

The biomass in Cunninghamia lanceolata forest under different afforestation way

In order to explore the influence of different afforestation way to the distribution pattern of biomass in Cunning hamia lanceolata forest,this paper took the pure forest of Cunninghamia lanceolata and mixed forest of Cunninghamia lanceo lata ×Pinus massoniana ,Cunningharnia lanceolata ×Liquidambar formosana as experimental material, to study the distribution pattern of biomass in the tree layer, the results showed that： planting Pinus massoniana and Liquidambar formosana un der Cunninghamia lanceolata forest which was 22 years old,after 18 years of Cultivation, the biomass were no difference compared With 40 years old Cunninghamia lanceolata pure forest,the net production capacity got a certain extent, the distribution pattern of biomass of tree layer under different afforestation way were all stem〉root,〉branch〉leaf, the biomass of stem ac counts for larger percentage,the Mixed forest can improve the biomass the biomass distribution pattern.