杉木人工林各植物组分含碳率研究

The carbon content of plant components of Chinese Fir plantation

分别采集会同县广坪林区第2代杉木人工林的杉木树干(去皮)、树皮、枝、叶、根系样品和灌木的干、枝(叶)和根样品与草本植物的地上、地下部分样品以及林内的枝、叶、果和碎屑凋落物和枯死根,用干烧法测定其含碳率。结果表明:杉木各器官含碳率大小的顺序是:树皮>树叶>树根>树干>树枝。树皮、树叶、树干、树枝含碳率随着树木年龄的增大而增加,树根含碳率随着树木年龄增大出现波动。林冠下草本植物的平均碳含量比木本植物低,且草本植物间碳含量差异要比木本植物间大。林龄对凋落物同种组分碳含量影响不显著。不同凋落物的碳含量即使在同一龄级也存在较大差异。枯死根系的碳含量要低于地上凋落物各组分的碳含量,林木各器官活有机体内的碳含量均大于相应死有机体(凋落物)内的碳含量。

Through large sums of survey outdoor, the content of the 2^nd generation Chinese fir plantation in Huitong County were stud- led in the paper. Using the dry method to test the carbon content with the testing material of the following： the trunks （peeled）, bark, branches, leaves, root samples of Chinese fir, and the branches （leaves） and root samples of shrubs, and the on the ground and un- derground part of herbaceous plants, and the branches, leaves, fruit litter and dead roots in the forest. The results are as followed： the rank of carbon content： bark 〉 leaf 〉 root 〉 root 〉 trunk 〉 branch. The carbon content of each component grows as the age of for- est except root. Within undergrowth the carbon content of woody plants is higher than herbaceous plants and there is huge diversity a- mong the same sort of plants. The same components of die things influenced little by growing age, but different those even in the same age stage differ from each other. The carbon content of die roots is lower than die things on the ground, and those in live organism is more than those in dead one.