沙地杨树、樟子松人工林固碳特征研究

Carbon Fixation Characteristics of Populus L. Planatation and Pinus sylvesrtris var. mongolica Litv. Planatation in Sandy Land

采用标准地样方和标准木调查测定等方法研究了沙地杨树、樟子松人工林不同林龄碳储量的变化。结果表明:10年樟子松人工林树木碳库和根系碳库分别占总碳储量的18.9%和2.1%;18年分别为50.5%和4.0%;25年分别为34.79%和3.0%;30年分别为47.1%和2.4%;5年杨树人工林树木碳库和根系碳库分别占总碳储量的24.8%和3.8%;8年分别为33.6%和6.7%;18年分别为39.6%和7.7%。与对照相比,樟子松造林10年、18年、25年和30年人工林0～60 cm土层林地土壤碳储量分别增加66.45%、56.13%、177.42%和207.74%,5年、8年、18年林龄杨树人工林0～60 cm土层土壤碳储量分别比对照增加74.8%、67.1%和65.8%。杨树和樟子松树木各部位碳含量总平均值分别为49.9%和42.3%。

The changes of carbon storage in different - stand - aged Populus L. planatation and Pinus sylvesrtris var. mongolica Litv. planatation in sandy land have been studied by use of sample plot and standard tree investigation and determination. The results show that for 10 -year Pinus sylvesrtris vat. mongolica Litv. planatation, the tree carbon pool and root system carbon pool take up 18.9% and 2.1% of the total carbon storage, for 18 -year Pinus sylvesrtris var. mongolica Litv. planatation, the tree carbon pool and root system carbon pool take up 50.5% and 4.0% of the total carbon storage, for 25 - year Pinus sylvesrtris var. mongolica Litv. planatation, the tree carbon pool and root system carbon pool take up 34.79% and 3.0% of the total carbon storage, and for 30 - year Pinus sylvesrtris var. mongolica Litv. planatation, the tree carbon pool and root system carbon pool take up 47.1% and 2.4% of the total carbon storage. For 5 - year Populus L. planatation, the tree carbon pool and root system carbon pool take up 24.8% and 3.8% of the total carbon storage, for 8 - year Populus L. planatation, the tree carbon pool and root system carbon pool take up 33.6% and 6.7% of the total carbon storage, for 18 - year Populus L. planatation, the tree carbon pool and root system carbon pool take up 39.6% and 7.7% of the total carbon storage. Compared with the control, for 10 -year, 18 -year, 25 -year and 30 -year Pinus sylvesrtris var. mongolica Litv. planatation, the soil carbon storage at 0 -60 cm soil layer have risen by 66.45% ; 56.13%, 177.42% and 207.74% separately. For 5 - year, 8 - year and 18 - year Populus L. planatation, the soil carbon storage at 0 - 60 cm soil layer have risen by 74.8%, 67.1% and 65.8% separately than the control. The total average carbon storage for each part of Populus L. and Pinus sylvesrtris var. mongolica Litv. is 49.9% and 42.3% separately.