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| 1 | Profile Characteristics and Potential EnvironmentalEffect of Accumulated Phosphorus in Soils of Vegetable Fields in Beijing显示文摘Profile characteristics of accumulated P in 10 representative soils of vegetable fields in suburban districtsof Beijing were investigated. Bioavailability of the accumuIated P and its potential effect on the environmentwere studied in a greenhouse pot experiment and a soil column experiment. The results showed that theconcentration of Olsen-P in the 0-20 cm soil samples of the vegetable fields ranged from 22.1 to 358.0 mgkg-1, which was 2 to 10 times higher than that of the crop fields in the suburbs of Beijing. Most of theexcessive phosphorus was accumulated in the topsoils. The longer the soils cultivated with vegetables, thehigher the soil total P, Olsen-P and organic matter concentration. Accumulated P in the soils from vegetablefields had higher bioavailability. Application of phosphorus fertilizer could not increase the dry weights ofcucumbers, Chinese cabbage, and rape seedlings continuously planted. The soil column study showed highP concentration (> 0.6 mg L-1) in the | SU DECHUN, YANG FENHE and ZHANG FUSUODepartment of Plant Nutrition, China Agricultural University, Beijing 100094 (China) | 2002 | Pedosphere2002，12，2： | 20 |
| 2 | Cadmium uptake and speciation changes in the rhizosphere of cadmium accumulator and non-accumulator oilseed rape varieties显示文摘Characteristics of cadmium (Cd) uptake kinetics and distribution of Cd speciation in the rhizosphere for Cd accumulator and non-accumulator oilseed rape varieties were investigated under nutrient solution and rhizobox soil culture conditions. The results showed that the maximal influx (Vmax) for Cd2+ and Km were significantly different for the two oilseed rape varieties. The value of Vmax for Cd accumulator oilseed rape Zhucang Huazi was two-fold greater than that for oilseed rape Chuan you II-93. The exchangeable Cd concentration in the rhizosphere was significantly lower than in non-rhizospheric soils supplemented with CdSO4 for both the varieties. Carbonate-bound Cd in the rhizosphere of Cd accumulator oilseed rape was significantly higher than that in the rhizosphere of non-accumulator oilseed rape and non-rhizospheric soil. Cd accumulator oilseed rape had a higher Cd2+ affinity and more ability to uptake insoluble Cd in the soil than the non-accumulator oilseed rape. | SU Dechun XING Jianping JIAO Weiping WONG Woonchung | 2009 | Journal of Environmental Sciences2009，21，8： | 4 |
| 3 | Prognostic Value of Speckle Tracking Echocardiography in Patients with ST ‐Elevation Myocardial Infarction Treated with Late Percutaneous Intervention显示文摘 | Tao Cong Yinghui Sun Zhijuan Shang Ke Wang Dechun Su Lei Zhong Shulong Zhang Yanzong Yang | 2015 | Echocardiography2015，，： | 1 |
| 4 | Field evidence of decreased extractability of copper and nickel added to soils in 6-year field experiments显示文摘 | Bao Jiang Dechun Su Xiaoqing Wang Jifang Liu Yibing Ma | 2018 | Frontiers of Environmental Science & Engineering2018，12，2： | 1 |
| 5 | Analytical solutions for the restraint effect of isolation piles against tunneling-induced vertical ground displacements显示文摘This paper presents a simplified elastic continuum method for calculating the restraint effect of isolation piles on tunneling-induced vertical ground displacement,which can consider not only the relative sliding of the pile‒soil interface but also the pile rowesoil interaction.The proposed method is verified by comparisons with existing theoretical methods,including the boundary element method and the elastic foundation method.The results reveal the restraining mechanism of the isolation piles on vertical ground displacements due to tunneling,i.e.the positive and negative restraint effects exerted by the isolation piles jointly drive the ground vertical displacement along the depth direction from the original tunneling-induced nonlinear variation situation to a relatively uniform situation.The results also indicate that the stiffness of the pile‒soil interface,including the pile shaft‒surrounding soil interface and pile tip-supporting soil interface,describes the strength of the pile‒soil interaction.The pile rows can confine the vertical ground displacement caused by the tunnel excavation to the inner side of the isolation piles and effectively prevent the vertical ground displacement from expanding further toward the outer side of the isolation piles. | Liqiang Cao Xiangsheng Chen Xing-Tao Lin Dong Su Huangcheng Fang Dechun Lu | 2023 | Journal of Rock Mechanics and Geotechnical Engineering2023，15，10： | 0 |
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