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| 1 | Spatio-temporal variations of soil water content and salinity around individual Tamarix ramosissima in a semi-arid saline region of the upper Yellow River, Northwest China显示文摘Ecological restoration by Tamarix plants on semi-arid saline lands affects the accumulation, distribution patterns and related mechanisms of soil water content and salinity. In this study, spatio-temporal variations of soil water content and salinity around natural individual Tamarix ramosissima Ledeb. were invetigated in a semi-arid saline region of the upper Yellow River, Northwest China. Specifically, soil water content, electrical conductivity(EC_e), sodium adsorption ratio(SAR_e), and salt ions(including Na^+, K^+, Ca^(2+), Mg^(2+) and SO_4^(2–)) were measured at different soil depths and at different distances from the trunk of T. ramosissima in May, July, and September 2016. The soil water content at the 20–80 cm depth was significantly lower in July and September than in May, indicating that T. ramosissima plants absorb a large amount of water through the roots during the growing period, leading to the decreasing of soil water content in the deep soil layer. At the 0–20 cm depth, there was a salt island effect around individual T. ramosissima, and the EC_e differed significantly inside and outside the canopy of T. ramosissima in May and July. Salt bioaccumulation and stemflow were two major contributing factors to this difference. The SAR_e at the 0–20 cm depth was significantly different inside and outside the canopy of T. ramosissima in the three sampling months. The values of SAR_e at the 60–80 cm depth in May and July were significantly higher than those at the 0–60 cm depth and higher than that at the corresponding depth in September. The distribution of Na^+ in the soil was similar to that of the SAR_e, while the concentrations of K^+, Ca^(2+), and Mg^(2+) showed significant differences among the sampling months and soil depths. Both season and soil depth had highly significant effects on soil water content, EC_e and SAR_e, whereas distance from the trunk of T. ramosissima only significantly affected EC_e. Based on these results, we recommend co-planting of shallow-rooted salt-tolerant species near the Tamarix plants and avoiding planting herbaceous plants inside the canopy of T. ramosissima for afforestation in this semi-arid saline region. The results of this study may provide a reference for appropriate restoration in the semi-arid saline regions of the upper Yellow River. | yang benman wang ruoshui xiao huijie cao qiqi liu tao | 2018 | Journal of Arid Land2018，10，1： | 5 |
| 2 | The Crustal Structure and Seismic Activity in North China显示文摘A layered crustal block model of North China has been constructed based on large amount of data from seismic sounding carried out in recent two decades. Some deep fault zones, such as the Zhangjiakou.Penglai and Tancheng-Lujiang fault zones, divide the upper crust of North China into three upper crustal terranes and nine bolcks. There are distinct differences in velocity and depth distributions, which reflects Cenozoic block faulting in North China in the process of formation of the deep structure. The upper crust shows the features of transition in isostatic adjustment. The existence of a low-velocity layer in the middle crust is characteristic of the crustal structure in North China. There seems to be an increase of rheology of the rocks in the lower crust and a persistence of stable regional stress field. The patterns of the Moho on two sides of the Yanshan-Taihang Mountains are different. The relief of the Moho around Beijing, Shijiazhuang and Guangrao where the deep faults join together shows a quadrantal distribution in some degree. The dynamic sources for seismic activity are the NE-SW horizontal compression and the diapirism of the upper mantle. The middle and upper crust, especially the layered block structure has the most significant effects on seismicity, and the occurrence of earthquakes is more closely related to them than to the Moho. | Feng Rui Institute of Geophysics, State Seismological Bureau, Beijing Huang Guifang, Zheng Shuzhen, Wang Jun, Yan Huifen Geophysical Prospecting Party, State Seismological Bureau, Zhengzhou, Henan and Zhang Ruoshui Seismological Technique College, State Seismological Bureau, Yanjiao,Hebei | 1989 | Acta Geologica Sinica(English Edition)1989，63，4： | 4 |
| 3 | A Study of The role played by renewable energies in China's sustainable energy supply 显示文摘 | Zhang Xiliang Wang Ruoshui Huo Molin | 2010 | Energy2010，，35： | 1 |
| 4 | Effects of different water levels on cotton growth and water use through drip irrigation in an arid region with saline ground water of Northwest China显示文摘 | Kang Yaohu Wang Ruoshui Wan Shuqin | 2012 | Agricultural Water Management2012，109，： | 1 |
| 5 | A study of the role played by renewable energies in China's sustainable energy supply 显示文摘 | Zhang Xiliang Wang Ruoshui Huo Molin | 2010 | Energy2010，，35： | 1 |
| 6 | A study of the role played by renewable energies in China' s sustainable energy supply显示文摘 | Zhang Xiliang Wang Ruoshui Huo Molin Eric Martinot | 2010 | Energy2010，35，11： | 1 |
| 7 | A study of the role played by renewable energies in China' s sustainable energy supply显示文摘 | Zhang Xiliang Wang Ruoshui Huo Molin | 2010 | Energy2010，35，11： | 1 |
| 8 | A study of the Role Played by Renewable Energies in China's Sustain- able Energy Supply 显示文摘 | Zhang Xiliang Wang Ruoshui Huo Molin | 2010 | Energy2010，，35： | 1 |
| 9 | Salt distribution and the growth of cotton under different drip irrigation regimes in a saline area显示文摘 | Wang Ruoshui Kang Yaohu Wan Shuqin | 2011 | Agricultural Water Management2011，100，1： | 1 |
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