Forestation is important for sequestering atmospheric carbon,and it is a cost-effective and nature-based solution(NBS)for mitigating global climate change.Here,under the assumption of forestation in the potential plan...Forestation is important for sequestering atmospheric carbon,and it is a cost-effective and nature-based solution(NBS)for mitigating global climate change.Here,under the assumption of forestation in the potential plantable lands,we used the forest carbon sequestration(FCS)model and field survey involving 3365 forest plots to assess the carbon sequestration rate(CSR)of Chinese existing and new forestation forests from 2010 to 2060 under three forestation and three climate scenarios.Without considering the influence of extreme events and human disturbance,the estimated average CSR in Chinese forests was 0.358±0.016 Pg C a^(-1),with partitioning to biomass(0.211±0.016 Pg C a^(-1))and soil(0.147±0.005 Pg C a^(-1)),respectively.The existing forests account for approximately 93.5%of the CSR,which will peak near 2035,and decreasing trend was present overall after 2035.After 2035,effective tending management is required to maintain the high CSR level,such as selective cutting,thinning,and approximate disturbance.However,new forestation from 2015 in the potential plantable lands would play a minimal role in additional CSR increases.In China,the CSR is generally higher in the Northeast,Southwest,and Central-South,and lower in the Northwest.Considering the potential losses through deforestation and logging,it is realistically estimated that CSR in Chinese forests would remain in the range of 0.161–0.358 Pg C a^(-1) from 2010 to 2060.Overall,forests have the potential to offset 14.1%of the national anthropogenic carbon emissions in China over the period of 2010–2060,significantly contributing to the carbon neutrality target of 2060 with the implementation of effective management strategies for existing forests and expansion of forestation.展开更多
With world population growth arable land area is decreasing. Saline soil is an important naturalresource. However it has not been well reclaimed owing to adverse conditions. Forestation is one way of saltysoil utiliza...With world population growth arable land area is decreasing. Saline soil is an important naturalresource. However it has not been well reclaimed owing to adverse conditions. Forestation is one way of saltysoil utilization; on the other hand, it can improve soil quality as well. The mechanism of salinity tolerance isthe basis for tree species selection when planting in salt affected soil. Different plants have various way ofsalinity tolerance, some are salt-exclusion, e.g. Elaeagnus angustifolia; some are salt-secretion, e.g. Tamarixspp.; some are salt-dilution, e.g. Hordeum vulgare; some are salt-avoidance, e.g. Rhizophora apiculata. Treesare favorable, which are salt tolerant and drought or waterlogging tolerant, as well as grow fast. After treespecies have been decided, site preparation including change or exchange of soil is necessary. Meanwhilesuitable density of trees and planting time must be carefully considered in terms of soil conditions andclimatic characteristics. Now a large scale of forests has been established in salt-affected soil in China by themeans discussed in the paper, and protect forest system along coast plays important roles in socio-economicsustainable development and improvement of eco-environment.展开更多
Soil nutrient content and biodiversity were investigated on the iron tailing land to detect impacts of forestation on the nutrient content and biodiversity. The results showed that the iron tailing had much lower cont...Soil nutrient content and biodiversity were investigated on the iron tailing land to detect impacts of forestation on the nutrient content and biodiversity. The results showed that the iron tailing had much lower contents of organic materials and available N than ordinary soil, and the iron tailing with forestation of Hippophae rhamnoides or Amorpha fruticos had higher contents of the two nutrients than the iron tailing without forestation. The species diversity index (including Simpson index and Shannon-Weiner index) and species richness index of the iron tailing with forestation of Hippophae rhamnoides or Amorpha fruticos were higher than that of the iron tailing without forestation, and the two indexes reached to the level of the nearby natural shrub forest. It was concluded that forestation was able to improve the soil nutrient condition of iron tailing in favor of the settlement of other species invaders, and to increase the species diversity. It would be a feasible way for iron tailings management to introduce the suitable plant species into the droughty and arid iron tailing land to enrich it and raise species diversity gradually.展开更多
基金supported by the National Natural Science Foundation of China(31988102,32171544)the National Science and Technology Basic Resources Survey Program of China(2019FY101300)the Youth Innovation Research Project from Key Laboratory of Ecosystem Network Observation and Modeling,Chinese Academy of Sciences。
文摘Forestation is important for sequestering atmospheric carbon,and it is a cost-effective and nature-based solution(NBS)for mitigating global climate change.Here,under the assumption of forestation in the potential plantable lands,we used the forest carbon sequestration(FCS)model and field survey involving 3365 forest plots to assess the carbon sequestration rate(CSR)of Chinese existing and new forestation forests from 2010 to 2060 under three forestation and three climate scenarios.Without considering the influence of extreme events and human disturbance,the estimated average CSR in Chinese forests was 0.358±0.016 Pg C a^(-1),with partitioning to biomass(0.211±0.016 Pg C a^(-1))and soil(0.147±0.005 Pg C a^(-1)),respectively.The existing forests account for approximately 93.5%of the CSR,which will peak near 2035,and decreasing trend was present overall after 2035.After 2035,effective tending management is required to maintain the high CSR level,such as selective cutting,thinning,and approximate disturbance.However,new forestation from 2015 in the potential plantable lands would play a minimal role in additional CSR increases.In China,the CSR is generally higher in the Northeast,Southwest,and Central-South,and lower in the Northwest.Considering the potential losses through deforestation and logging,it is realistically estimated that CSR in Chinese forests would remain in the range of 0.161–0.358 Pg C a^(-1) from 2010 to 2060.Overall,forests have the potential to offset 14.1%of the national anthropogenic carbon emissions in China over the period of 2010–2060,significantly contributing to the carbon neutrality target of 2060 with the implementation of effective management strategies for existing forests and expansion of forestation.
文摘With world population growth arable land area is decreasing. Saline soil is an important naturalresource. However it has not been well reclaimed owing to adverse conditions. Forestation is one way of saltysoil utilization; on the other hand, it can improve soil quality as well. The mechanism of salinity tolerance isthe basis for tree species selection when planting in salt affected soil. Different plants have various way ofsalinity tolerance, some are salt-exclusion, e.g. Elaeagnus angustifolia; some are salt-secretion, e.g. Tamarixspp.; some are salt-dilution, e.g. Hordeum vulgare; some are salt-avoidance, e.g. Rhizophora apiculata. Treesare favorable, which are salt tolerant and drought or waterlogging tolerant, as well as grow fast. After treespecies have been decided, site preparation including change or exchange of soil is necessary. Meanwhilesuitable density of trees and planting time must be carefully considered in terms of soil conditions andclimatic characteristics. Now a large scale of forests has been established in salt-affected soil in China by themeans discussed in the paper, and protect forest system along coast plays important roles in socio-economicsustainable development and improvement of eco-environment.
文摘Soil nutrient content and biodiversity were investigated on the iron tailing land to detect impacts of forestation on the nutrient content and biodiversity. The results showed that the iron tailing had much lower contents of organic materials and available N than ordinary soil, and the iron tailing with forestation of Hippophae rhamnoides or Amorpha fruticos had higher contents of the two nutrients than the iron tailing without forestation. The species diversity index (including Simpson index and Shannon-Weiner index) and species richness index of the iron tailing with forestation of Hippophae rhamnoides or Amorpha fruticos were higher than that of the iron tailing without forestation, and the two indexes reached to the level of the nearby natural shrub forest. It was concluded that forestation was able to improve the soil nutrient condition of iron tailing in favor of the settlement of other species invaders, and to increase the species diversity. It would be a feasible way for iron tailings management to introduce the suitable plant species into the droughty and arid iron tailing land to enrich it and raise species diversity gradually.
