scholarly journals Fine root dynamic characteristics and effect on plantation’s carbon sequestration of three Salix shrub plantations in Tibetan Plateau alpine sandy land

2021 ◽  
Vol 11 (6) ◽  
pp. 2645-2659
Author(s):  
Lingxianzi He ◽  
Zhiqing Jia ◽  
Qingxue Li ◽  
Youyan Zhang ◽  
Rina Wu ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Tibetan Plateau ◽  
Dynamic Characteristics ◽  
Fine Root ◽  
Sandy Land ◽  
Alpine Sandy Land

scholarly journals Seasonal Dynamics of Water Use Strategy of Two Salix Shrubs in Alpine Sandy Land, Tibetan Plateau

PLoS ONE ◽  
2016 ◽  
Vol 11 (5) ◽  
pp. e0156586 ◽  
Author(s):  
Yajuan Zhu ◽  
Guojie Wang ◽  
Renqiang Li
Keyword(s):  
Tibetan Plateau ◽  
Water Use ◽  
Seasonal Dynamics ◽  
Sandy Land ◽  
Water Use Strategy ◽  
Alpine Sandy Land

scholarly journals Effects of different plantation types on soil properties after vegetation restoration in an alpine sandy land on the Tibetan Plateau, China

2017 ◽  
Vol 9 (2) ◽  
pp. 200-209 ◽  
Author(s):  
Qingxue Li ◽  
Zhiqing Jia ◽  
Tao Liu ◽  
Lili Feng ◽  
Lingxianzi He
Keyword(s):  
Tibetan Plateau ◽  
Soil Properties ◽  
Vegetation Restoration ◽  
The Tibetan Plateau ◽  
Sandy Land ◽  
Alpine Sandy Land

scholarly journals Dynamics of biomass and carbon sequestration across a chronosequence of Caragana intermedia plantations on alpine sandy land

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Qingxue Li ◽  
Zhiqing Jia ◽  
Lili Feng ◽  
Lingxianzi He ◽  
Kaiyue Yang
Keyword(s):  
Carbon Sequestration ◽  
Sandy Land ◽  
Caragana Intermedia ◽  
Alpine Sandy Land

scholarly journals Land use alters arbuscular mycorrhizal fungal communities and their potential role in carbon sequestration on the Tibetan Plateau

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Meng Xu ◽  
Xiaoliang Li ◽  
Xiaobu Cai ◽  
Xiaolin Li ◽  
Peter Christie ◽  
...  
Keyword(s):  
Land Use ◽  
Carbon Sequestration ◽  
Tibetan Plateau ◽  
Potential Role ◽  
Arbuscular Mycorrhizal ◽  
Fungal Communities ◽  
The Tibetan Plateau ◽  
Arbuscular Mycorrhizal Fungal

Effects of soil improvement of Caragana intermedia plantations in alpine sandy land on Tibet Plateau

2014 ◽  
Vol 34 (2) ◽  
pp. 123-128 ◽  
Author(s):  
Qingxue Li ◽  
Yongsheng Wang ◽  
Yajuan Zhu ◽  
Hong Li ◽  
Zhiqing Jia ◽  
...  
Keyword(s):  
Soil Improvement ◽  
Tibet Plateau ◽  
Sandy Land ◽  
Caragana Intermedia ◽  
Alpine Sandy Land

scholarly journals Variations in diurnal and seasonal net ecosystem carbon dioxide exchange in a semiarid sandy grassland ecosystem in China's Horqin Sandy Land

2020 ◽  
Vol 17 (24) ◽  
pp. 6309-6326
Author(s):  
Yayi Niu ◽  
Yuqiang Li ◽  
Hanbo Yun ◽  
Xuyang Wang ◽  
Xiangwen Gong ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Sequestration ◽  
C Sequestration ◽  
Annual Precipitation ◽  
Horqin Sandy Land ◽  
Sandy Land ◽  
Near Surface ◽  
Effective Precipitation ◽  
Precipitation Pulses ◽  
Sandy Grassland

Abstract. Grasslands are major terrestrial ecosystems in arid and semiarid regions, and they play important roles in the regional carbon dioxide (CO2) balance and cycles. Sandy grasslands are sensitive to climate change, yet the magnitudes, patterns, and environmental controls of their CO2 flows are poorly understood for some regions (e.g., China's Horqin Sandy Land). Here, we report the results from continuous year-round CO2 flux measurements for 5 years from a sandy grassland in China's Horqin Sandy Land. The grassland was a net CO2 source at an annual scale with a mean annual net ecosystem CO2 exchange (NEE) of 49 ± 8 gCm-2yr-1 for the years for which a complete dataset was available (2015, 2016, and 2018). Annual precipitation had the strongest effect on annual NEE; grassland carbon sequestration increased with the increasing precipitation since NEE depended on annual precipitation. In the spring, NEE decreased (i.e., C sequestration increased) with increasing magnitude of effective precipitation pulses, total monthly precipitation, and soil temperature (Tsoil). In the summer, NEE was dominated by the total seasonal precipitation and high precipitation pulses (> 20 mm). In the autumn, NEE increased (i.e., C sequestration decreased) with increasing effective precipitation pulses, Tsoil, and near-surface soil water content (SWC) but decreased with increased SWC deeper in the soil. In the winter, NEE decreased with increasing Tsoil and SWC. The sandy grassland was a net annual CO2 source because drought decreased carbon sequestration by the annual plants. Long-term observations will be necessary to reveal the true source or sink intensity and its response to environmental and biological factors.

scholarly journals Biomass Accumulation and Carbon Sequestration in an Age-Sequence of Mongolian Pine Plantations in Horqin Sandy Land, China

Forests ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 197 ◽  
Author(s):  
Xiao Zhang ◽  
Xueli Zhang ◽  
Hui Han ◽  
Zhongjie Shi ◽  
Xiaohui Yang
Keyword(s):  
Carbon Sequestration ◽  
Forest Floor ◽  
Developmental Stages ◽  
Northern China ◽  
Stand Age ◽  
Horqin Sandy Land ◽  
Sandy Land ◽  
Carbon Density ◽  
Tree Biomass ◽  
Ecosystem Carbon

The Mongolian pine (Pinus sylvestris L. var. mongolica Litv.) was first introduced to the southeastern Horqin sandy land in the mid-1950s. Since then, it has been widely planted and has become the most important conifer species in Northern China, providing significant ecological, economic and social benefits. However, its function in sequestering carbon at different developmental stages has been little studied. In this study, twenty plots inventory and destructive sampling of eight trees were conducted in 12-, 19-, 34-, 48- and 58-year-old Mongolian pine stands of China. Allometric biomass equations (ABEs) for tree components were established and used to determine the magnitude and distribution of tree biomass and carbon density. The carbon density of the understory, forest floor and soil was also determined. The ABEs with age as the second variable could simply and accurately determine the biomass of plantation tree branches, foliage and fruit, which were considerably influenced by age. With increasing stand age, the proportion of stem biomass to total tree biomass increased from 22.2% in the 12-year-old stand to 54.2% in the 58-year-old stand, and the proportion of understory biomass to total ecosystem biomass decreased, with values of 7.5%, 4.6%, 4.4%, 4.1% and 3.0% in the five stands. The biomass of the forest floor was 0.00, 1.12, 2.04, 6.69 and 3.65 Mg ha−1 in the five stands. The ecosystem carbon density was 40.2, 73.4, 92.9, 89.9 and 87.3 Mg ha−1 in the 12-, 19-, 34-, 48-, and 58-year-old stands, in which soil carbon density accounted for the largest proportion, with values of 67.4%, 76.8%, 73.2%, 63.4%, and 57.7% respectively. The Mongolian pine had the potential for carbon sequestration during its development, especially in the early stages, however, in the later growth stage, the ecosystem carbon density decreased slightly.

scholarly journals Stability and micro-topography effects of Sophora moorcroftiana community for fixation of sandy land under natural restoration, southern Tibetan Plateau

Authorea ◽  
2020 ◽  
Author(s):  
Chengrui Liao ◽  
Haidong Li ◽  
Guoping Lv ◽  
Meirong Tian ◽  
Jiarong Tian ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Sandy Land ◽  
Natural Restoration ◽  
Southern Tibetan Plateau ◽  
Micro Topography ◽  
Sophora Moorcroftiana

scholarly journals Dynamic Responses of Multidiameter-class Fine Roots at Different Soil Depths to Thinning Measures in a Secondary Forest in China

2021 ◽  
Author(s):  
Yue Pang ◽  
Jing Tian ◽  
Dexiang Wang
Keyword(s):  
Biomass Production ◽  
Dynamic Characteristics ◽  
Fine Roots ◽  
Root Biomass ◽  
Turnover Rate ◽  
Fine Root ◽  
Secondary Forest ◽  
Fine Root Biomass ◽  
Dynamic Responses ◽  
Qinling Mountains

Abstract Background: Fine roots make critical contributions to carbon stocks and terrestrial productivity, and multidiameter-class fine roots exhibit functional heterogeneity. However, the dynamic characteristics of multidiameter-class fine roots at different soil depths following thinning disturbances are poorly understood. We investigated the biomass, production, mortality and turnover rate of < 0.5 mm, 0.5–1 mm and 1–2 mm fine roots at 0-20 cm, 20-40 cm and 40-60 cm soil depths under five thinning intensities (0%, 15%, 30%, 45%, and 60%) in a secondary forest in the Qinling Mountains. Results: The biomass, production and turnover rate of < 0.5 mm fine roots fluctuated with increasing thinning intensity, while 0.5-1 mm and 1-2 mm fine root biomass significantly decreased. Thinning measures had no effects on fine root necromass (except for T4) or mortality. The fine root dynamic characteristics in deeper soils were more sensitive to thinning measures. Principal component analysis results show that increased < 0.5 mm fine root biomass and production resulted from increased shrub and herb diversity and biomass and decreased soil nutrient availability, stand volume and litter biomass, whereas 0.5-1 mm and 1-2 mm fine root biomass showed the opposite trends and change mechanisms. Conclusions: Our results provide evidence of the positive effect of thinning on very fine root (< 0.5 mm) biomass and production and the negative effect on thicker fine roots (0.5-1, 1-2 mm) or all fine root (< 2 mm) biomass. From the perspective of fine root biomass and productivity, T2 (30%) is recommended for use in secondary forests of the Qinling Mountains. Moreover, our results suggest that thinning practices have varied effects on the dynamic characteristics of multidiameter-class fine roots.

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