Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： Land degradation is one of the long-term challenging eco-environmental problems and it was even worse at the agropastoral transitional region in China in the 1980s. Taking the Horqin Sandy Land as a case study of the agro-pastoral transitional region, Naiman Desertification Research Station, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences has made a series of achievements in the research on the mechanism of desertification-prone ecosystems, desertification monitoring, restoration techniques trial and demonstrations, and dissemination of in-depth research findings. It has been one of the leading research and data collection platforms in the research and observation of fragile ecosystems, particularly in academic research and technical development for combating desertification in China. The innovative models, represented with the Integrative Model for Combating Desertification and Promoting Development, have been widely adopted for restoration of desertification-prone land sand sustainable land management (SLM). Naiman Station was awarded by UNEP and UNDP for its success in saving the drylands. With this model, Naiman Station has successfully introduced more than 100 species of crops, vegetables, fruit trees, and grasses and developed related techniques for ecological conservation, local economic development, and improvement of livelihood of local people. The station has made a profound contribution to combating desertification in Horqin Sandy Land and in Northern China as a whole. Naiman Station will challenge the mounting issues of water scarcity caused by growing land use pressure and climate change, through carrying out continuous research in the mechanism of synergic succession of soil-plant subsystem. Based on the achievement of this valuable research, this station will develop more adaptive techniques and models for sustainable land management, and provide immediate scientific and technological supports to the ecological shelters and sustainable development in Northern China.
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2018-11-08 Cooperative journals: 《干旱区研究》
Abstract：差巴嘎蒿是沙地恢复过程中植被演替的重要物种，是半流动沙丘的优势物种之一。本文从化感作用角度，研究了不同浓度差巴嘎蒿叶浸提液(0、10、20、40、60、80 g·L-1和100 g·L-1)对狗尾草、达乌里胡枝子、大果虫实和冰草的种子萌发的影响。结果表明：差巴嘎蒿叶浸提液对狗尾草种子萌发的影响较小，低浓度浸提液处理对其萌发有一定的促进作用，而对其他3个物种均表现为显著的抑制效应，且随处理浓度增加，抑制效应增大。差巴嘎蒿对其他物种的种子萌发均具有强烈的化感作用，通过叶片凋落后的物质释放形成的化感作用可能是其保持竞争优势的重要方式之一。
Subjects: Biology >> Botany >> Plant ecology, plant geography submitted time 2016-05-03
Abstract： Aims Forest carbon storage in Inner Mongolia plays a significant role in national terrestrial carbon budget due to its largest forest area in China. Our objectives were to estimate the carbon storage in the forest ecosystems in Inner Mongolia, and to reveal its spatial pattern. Methods In the study, field survey and sampling were conducted at 137 sites, which were nearly evenly distributed in most forest types in the study region. At each site, the ecosystem carbon density at each site was estimated thorough sampling and measuring pools of soil (0–100 cm) and vegetation, including biomass of tree, grass, shrub, and litter. Regional carbon storage was further calculated with the estimated carbon density for each forest type. Important findings Carbon storage of vegetation layer in forests in Inner Mongolia was 787.8 Tg C, with the biomass of tree, litter, herbaceous and shrub account for 93.5%, 3.0%, 2.7% and 0.8%, respectively. Carbon density of vegetation layer was 40.4 t?hm–2, with 35.6 t?hm–2 in trees, 2.9 t?hm–2 in litter, 1.2 t?hm–2 in herbaceous and 0.6 t?hm–2 in shrubs. In comparison, carbon storage of soil layer in forests in Inner Mongolia was 2449.6 Tg C, with 79.8% distributed in the first 30 cm. Carbon density of soil layer was 144.4 t?hm–2. Carbon storage of forest ecosystem in Inner Mongolia was 3237.4 Tg C, with vegetation and soil accounting for 24.3% and 75.7%, respectively. Carbon density of forest ecosystem in Inner Mongolia was 184.5 t?hm–2. Carbon density of soil layer was positively correlated with that of vegetation layer. Spatially, both carbon storage and carbon density were higher in the eastern area, where the climate is more humid. Forest reserve construction and artificial afforestation can significantly improve the capacity of regional carbon sink.
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