Institute for Forest Resources & Environment of Guizhou, Guizhou University, Guiyang, 550025, PR China; Guizhou Provincial Key Laboratory for Environment, Guizhou Normal University, Guiyang, 550001, PR China; College of Forestry, Guizhou University, Guiyang, 550025, PR China.
Institute for Forest Resources & Environment of Guizhou, Guizhou University, Guiyang, 550025, PR China; College of Forestry, Guizhou University, Guiyang, 550025, PR China; Puding Karst Ecosystem Research Station of Guizhou Province, Anshun, 561000, PR China.
J Environ Manage. 2018 Dec 15;228:40-46. doi: 10.1016/j.jenvman.2018.09.017. Epub 2018 Sep 10.
The present article reports an assessment of afforestation potential and anticipation of carbon sequestration in the Houzhai River Basin in Guizhou Province in southwestern China. Total of 2755 soil profiles consisting of 22,057 soil samples were collected according to a grid-sampling method at a 150 m scale in the Houzhai River basin, and the SOC contents in soil samples were analyzed using a titration method. General information regarding the geographic characteristics of each sampling grid was recorded in the field. The results indicate that land use in the Houzhai River Basin is very complex. Land use status and land use change in the study area were closely associated with local geographic characteristics and variations in economic structures. There were approximately 15.26 km of land that could or should be rearranged as afforestation land in the Houzhai River Basin. The increased SOC storage (0.00-1.00 m soil horizon) would be up to 5.48 × 10 Mg, 6.42 × 10 Mg, 4.77 × 10 Mg and 3.18 × 10 Mg when all of the calculated lands became shrub-grass lands, shrub lands, arbor-shrub forest lands and arbor forest lands, respectively. The increased SOC percentages would be 52.16%, 61.13%, 45.39% and 30.32%, respectively, in comparison with the present SOC storage in these lands.
本研究报告评估了中国西南部贵州省后寨河流域的造林潜力和碳固存预测。总共采集了 2755 个土壤剖面，每个剖面包含 22057 个土壤样本，采用网格采样方法，在 150m 尺度上采集了后寨河流域的土壤样本，使用滴定法分析了土壤样本中的 SOC 含量。每个采样网格的地理特征的一般信息都在现场记录下来。结果表明，后寨河流域的土地利用非常复杂。研究区的土地利用状况和土地利用变化与当地地理特征和经济结构变化密切相关。在后寨河流域，大约有 15.26km²的土地可以或应该重新规划为造林用地。如果所有计算出的土地都变成灌草林地、灌丛地、乔灌林地和乔木林地，那么土壤有机碳储量（0.00-1.00m 土壤层）将分别增加 5.48×10⁵Mg、6.42×10⁵Mg、4.77×10⁵Mg 和 3.18×10⁵Mg。与这些土地目前的土壤有机碳储量相比，土壤有机碳百分比将分别增加 52.16%、61.13%、45.39%和 30.32%。
