Canopy interception loss in a Pinus sylvestris var. mongolica forest of Northeast China
LI Yi1, CAI Tijiu1,2*, MAN Xiuling2, SHENG Houcai2, JU Cunyong2
1 Center for Ecological Research, Northeast Forestry University, Harbin 150040, China; 2 College of Forestry, Northeast Forestry University, Harbin 150040, China
Canopy interception loss in a Pinus sylvestris var. mongolica forest of Northeast China
LI Yi1, CAI Tijiu1,2*, MAN Xiuling2, SHENG Houcai2, JU Cunyong2
1 Center for Ecological Research, Northeast Forestry University, Harbin 150040, China; 2 College of Forestry, Northeast Forestry University, Harbin 150040, China
摘要 Pinus sylvestris var. mongolica is one of the main species to be afforested in deserts of China. But little work has been carried out on the canopy interception loss of this plant species. For researching the canopy in-terception loss of a natural P. sylvestris forest, we observed the gross precipitation, gross snowfall, throughfall and stemflow in a sample plot at the Forest Ecosystem Research Station of Mohe in the Great Khingan Mountains of Northeast China from July 2012 to September 2013. Considering the spatial variability of the throughfall, we increased the area rather than the number of collector and randomly relocated them once a week. The results demonstrated that the throughfall, stemflow, and derived estimates of rainfall and snowfall interception loss during the main rainy and snowy seasons were 77.12%±5.70%, 0.80%, 22.08%±5.51% and 21.39%±1.21% of the incident rainfall or snowfall, respectively. The stemflow didn’t occur unless the accu-mulated rainfall reached up to 4.8 mm. And when the gross precipitation became rich enough, the stemflow increased with increasing tree diameters. Our analysis revealed that throughfall was not observed when rainfall was no more than 0.99 mm, indicating that the canopy storage capacity at saturation was 0.99 mm for P. sylvestris forest.
Abstract: Pinus sylvestris var. mongolica is one of the main species to be afforested in deserts of China. But little work has been carried out on the canopy interception loss of this plant species. For researching the canopy in-terception loss of a natural P. sylvestris forest, we observed the gross precipitation, gross snowfall, throughfall and stemflow in a sample plot at the Forest Ecosystem Research Station of Mohe in the Great Khingan Mountains of Northeast China from July 2012 to September 2013. Considering the spatial variability of the throughfall, we increased the area rather than the number of collector and randomly relocated them once a week. The results demonstrated that the throughfall, stemflow, and derived estimates of rainfall and snowfall interception loss during the main rainy and snowy seasons were 77.12%±5.70%, 0.80%, 22.08%±5.51% and 21.39%±1.21% of the incident rainfall or snowfall, respectively. The stemflow didn’t occur unless the accu-mulated rainfall reached up to 4.8 mm. And when the gross precipitation became rich enough, the stemflow increased with increasing tree diameters. Our analysis revealed that throughfall was not observed when rainfall was no more than 0.99 mm, indicating that the canopy storage capacity at saturation was 0.99 mm for P. sylvestris forest.
The National Natural Science Foundation of China (31370460)
通讯作者:
CAI Tijiu
E-mail: caitijiu1963@163.com
引用本文:
LI Yi, CAI Tijiu, MAN Xiuling, SHENG Houcai, JU Cunyong. Canopy interception loss in a Pinus sylvestris var. mongolica forest of Northeast China[J]. 干旱区科学, 2015, 7(6): 831-840.
LI Yi, CAI Tijiu, MAN Xiuling, SHENG Houcai, JU Cunyong. Canopy interception loss in a Pinus sylvestris var. mongolica forest of Northeast China. Journal of Arid Land, 2015, 7(6): 831-840.
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2015, Vol. 7 
