Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract: Highways and railways are important infrastructures of land transportation. The blown-sand hazard control of traffic arteries in sandy areas has always been one important issue in the national economy and society. In view of the characteristics of aeolian environment and the demand for safe operation of traffic arteries, China has carried out a large number of sand hazard control experiment and practices mainly on technology innovation of materials, measures, comprehensive system, maintenance, summed up four configuration patterns of sand control system, and created some patterns of sand hazard control technology for desert traffic arteries in different aeolian environments with Chinese characteristics, the patterns have been applied successfully in the Baotou-Lanzhou Railway, Qinghai-Tibet Railway, Tarim Desert Highway and Open Channel in Gurbantunggut Desert. China’s achievements in the sand hazard control for land transportation arteries have a broad application prospect in sandy areas in the world, especially in the countries along the Belt and Road.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract: The connotation of “sand industry” is to utilize the desert resources in the process of prevention and control of desertification effectively, and expand the space of energy-saving green agricultural industry. This paper overviews the technological advances about Cistanche deserticola planting industry, introduces the development trend of Cistanche deserticola industry and advanced planting technology especially, analyzes and estimates economic benefits of Cistanche deserticola planting, finally, views the application and popularization perspective of Cistanche deserticola planting technologically.
Subjects: Biology >> Botany submitted time 2022-12-20 Cooperative journals: 《干旱区研究》
Abstract:
Plant habit (form) is the main factor in determining the function of different plants in maintaining vegetative cover under wind erosion. Knowing the effects of different forms of herbaceous plants against wind erosion in a sandy desertified area can provide valuable references for ecological restoration measures. In this study, we conducted wind tunnel experiments to measure the erosion rate under three forms of herbaceous plants (creeping, globular, and plexiform) under different extents of vegetative cover (25%, 30%, 35%, 40%, and 45%). Aerodynamic roughness increased, and wind speed was reduced with the increase in vegetative cover, for all three plant forms. However, under low coverage, the wind erosion inhibition rate differed greatly among the different plant forms; the sand fixation ability of globular and creeping plants was higher than that of the plexiform plants. The plant type with high wind erosion inhibition efficiency can achieve the sand fixation effect of the plant type with low wind erosion inhibition efficiency under the condition of high coverage. At 30% coverage, the wind erosion inhibition efficiency of creeping and globular plants was 47.55% and 55.70% , respectively, which was not much different than the efficiency of plexiform plants at 40% (48.46% ) and 45% (56.94% ) coverage, respectively. The wind erosion inhibition efficiency of the three types of herbaceous plants increased linearly with the increase in coverage. The smaller the coverage, the greater the difference among the three plants. The wind erosion rate of the three plant forms was lowest in creeping, followed by globular, and highest in plexiform. Conversely, the wind erosion inhibition rate was highest in creeping, followed by globular, and lowest in plexiform
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2020-11-20 Cooperative journals: 《干旱区地理》
Abstract:为确定古尔班通古特沙漠南缘地下水深埋区毛管上升水的最大上升高度,对划分固沙植物水分来源提供理论依据,于2016年3月~2018年11月,采用中子仪法对试验地0~10 m土层土壤含水量进行观测,分析沙丘不同坡位土壤含水量的季节变化情况,并利用最大分子持水量与土壤含水量曲线交会法确定试验地毛管水的最大上升高度。结果表明:沙丘不同坡位0~130 cm土层的土壤含水量受外界气象因素影响较大,随季节变化规律明显;130 cm土层以下至570~760 cm土层为土壤含水量较为稳定的干沙层;而570~760 cm以下土层的土壤含水量主要受地下水水位波动和毛管上升水的影响,其含水量变化上界可看作是毛管水的最大上升高度。试验地的最大分子持水量为0.026 1 cm3·cm-3,且沙丘不同坡位毛管水的最大上升高度分布在250~290 cm之间。