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Liquefaction and FTIR analysis of two desert shrubs Salix psammophila and caragana intermedia

Forestry Studies in China 2006年第3期8卷 38-42页

作者： Zhang Chen-xia Huang Jin-tian College of Forestry Engineering Inner Mongolia Agricultural University Huhhot 010018 P. R. China

In order to extend the investigation of the characteristics of desert shrub liquefaction and the structure of liquefied desert shrubs, we studied the liquefaction of Salixpsammophila and caragana intermedia in the presence of phenol and used FTIR analysis on unliquefied and liquefied S. psammophila and C. intermedia. The results showed that the liquefaction effects are enhanced with an increase in temperature, catalyst content and liquid ratio. FTIR analysis proved that more active functional groups appeared after S. psammophila and C. intermedia were liquefied in the presence of phenol. These results can provide a theoretical basis for the further utilization of liquefied S. psammophila and C. intermedia and the development of desert shrubs in a new utilization field.

关键词： desert shrubs Salix psammophila caragana intermedia liquefaction residue rate FTIR analysis

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Biocrust-induced partitioning of soil water between grass and shrub in a desert steppe of Northwest China

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Journal of Arid Land 2023年第1期15卷 63-76页

作者： YANG Xinguo WANG Entian QU Wenjie WANG Lei Northwest National Key Laboratory Breeding Base for Land Degradation and Ecological Restoration Ningxia UniversityYinchuan 750021China Key Laboratory of Restoration and Reconstruction of Degraded Ecosystems Ministry of EducationNingxia UniversityYinchuan 750021China Ecology and Environment College Ningxia UniversityYinchuan 750021China

Maintaining the stability of exotic sand-binding shrub has become a large challenge in arid and semi-arid grassland ecosystems in northern *** investigated two kinds of shrublands with different BSCs(biological soil crusts)cover in desert steppe in Northwest China to characterize the water sources of shrub(caragana intermedia Kuang et ***)and grass(Artemisia scoparia *** Kit.)by stable 18O *** results showed that both shrublands were subject to persistent soil water deficiency from 2012 to 2017,the minimum soil depth with CV(coefficient of variation)<15% and SWC(soil water content)<6% was 1.4 m in shrubland with open areas lacking obvious BSC cover,and 0.8 m in shrubland covered by mature *** ***,a considerable proportion of water sources pointed to the surface *** from BSCs contributed to averages 22.9%and 17.6%of the total for *** and ***,*** might use more water from BSCs in rainy season than dry season,in contrast to *** relationship between shrub(or grass)and soil water by δ^(18)O shown significant differences in months,which partly verified the potential trends and relations covered by the high variability of the water source at seasonal *** fine roots at 0-5 cm soil layer could be found in the surface soil layer covered by BSCs(8000 cm/m^(3))than without BSCs(3200 cm/m^(3)),which ensured the possibility of using the surface soil water by *** result implies that even under serious soil water deficiency,*** can use the surface soil water,leading to the coexistence between *** and *** with the result from BSCs in desert areas,the natural withdrawal of artificial *** from desert steppe will be a long-term process,and the highly competitive relationship between shrubs and grasses also determines that its habitat will be maintained in serious drought state for a long time.

关键词： desert steppe biological soil crusts water resource caragana intermedia Artemisia scoparia

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