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| 1 | Aging Effects of Organic and Inorganic Fertilizers on Phosphorus Fractionation in a Calcareous Sandy Loam Soil显示文摘In most arid and semiarid soils, naturally occurring phosphorus(P) is a major yield-limiting plant nutrient. In this study, to investigate the effects of organic(OP) and inorganic P(IP) sources on P fractionation, a calcareous sandy loam alkaline soil was fertilized with OP and IP fertilizers at low(80 mg P kg^(-1) soil) and high(160 mg P kg^(-1) soil) application rates. Three combinations of OP and IP(i.e., 75% OP + 25% IP, 50% OP + 50% IP, and 25% OP + 75% IP) were applied at low and high application rates,respectively, followed by soil aging for 21 d. Soil samples were collected after 1, 2, 3, 7, and 21 d and subjected to sequential extraction to analyze soluble and exchangeable, Fe-and Al-bound, Ca-bound, and residual P fractions. The soluble and exchangeable P fraction significantly increased up to 24.3%, whereas the Ca-bound fraction decreased up to 40.7% in the soils receiving 75% OP + 25% IP and 50% OP + 50% IP, respectively, compared with the control(receiving no P fertilizer). However, the transformation of P fractions was influenced by aging time. Addition of P sources caused instant changes in different P fractions, which then tended to decline with aging time. Change in soil p H was the limiting factor in controlling P availability. At high application rate, the OP source significantly increased soil P availability compared with the IP source with soil aging. Depending on P fractionation, a proper combination of OP and IP fertilizers, as long-term slow and instant P-releasing sources for plant uptake, respectively, may be a sustainable strategy to meet crop P requirements in the arid and semiarid soils. | Munir AHMAD Mahtab AHMAD Ahmed H.EL-NAGGAR Adel R.A.USMAN Adel ABDULJABBAR Meththika VITHANAGE Jamal ELFAKI Abdulelah AL-FARAJ Mohammad I.AL-WABEL | 2018 | Pedosphere2018，28，6： | 8 |
| 2 | Conocarpus Biochar Induces Changes in Soil Nutrient Availability and Tomato Growth Under Saline Irrigation显示文摘Thermally modified organic materials commonly known as biochar have gained popularity of being used as a soil amendment.Little information, however, is available on the role of biochar in alleviating the negative impacts of saline water on soil productivity and plant growth. This study, therefore, was conducted to investigate the effects of Conocarpus biochar(BC) and organic farm residues(FR) at different application rates of 0.0%(control), 4.0% and 8.0%(weight/weight) on yield and quality of tomatoes grown on a sandy soil under drip irrigation with saline or non-saline water. The availability of P, K, Fe, Mn, Zn and Cu to plants was also investigated. The results demonstrated clearly that addition of BC or FR increased the vegetative growth, yield and quality parameters in all irrigation treatments. It was found that salt stress adversely affected soil productivity, as indicated by the lower vegetative growth and yield components of tomato plants. However, this suppressing effect on the vegetative growth and yield tended to decline with application of FR or BC, especially at the high application rate and in the presence of biochar. Under saline irrigation system, for instance, the total tomato yield increased over the control by 14.0%–43.3% with BC and by 3.9%–35.6% with FR. These could be attributed to enhancement effects of FR or BC on soil properties, as indicated by increases in soil organic matter content and nutrient availability. Therefore, biochar may be effectively used as a soil amendment for enhancing the productivity of salt-affected sandy soils under arid conditions. | Adel Rabie A.USMAN Mohammad I.AL-WABEL Yong S.OK Abdulaziz AL-HARBI Mahmoud WAHB-ALLAH Ahmed Hamdy EL-NAGGAR Mahtab AHMAD Abdulelah AL-FARAJ Abdulrasoul AL-OMRAN | 2016 | Pedosphere2016，26，1： | 8 |
| 3 | Effects of pyrolysis temperature on soybean stover- and peanut shell-derived biochar properties and TCE adsorption in water显示文摘 | Mahtab Ahmad Sang Soo Lee Xiaomin Dou Dinesh Mohan Jwa-Kyung Sung Jae E Yang Yong Sik Ok | 2012 | Bioresource Technology2012，，： | 1 |
| 4 | Trichloroethylene adsorption by pine needle biochars produced at various pyrolysis temperatures显示文摘 | Mahtab Ahmad Sang Soo Lee Anushka Upamali Rajapaksha Meththika Vithanage Ming Zhang Ju Sik Cho Sung-Eun Lee Yong Sik Ok | 2013 | Bioresource Technology2013，，： | 1 |
| 5 | Effects of pyrolysis temperature on soybean stover- and peanut shell-derived biochar properties and TCE adsorption in water显示文摘 | Mahtab Ahmad Sang Soo Lee Xiaomin Dou Dinesh Mohan Jwa-Kyung Sung Jae E Yang Yong Sik Ok | 2012 | Bioresource Technology2012，，： | 1 |
| 6 | Team learning, top management support and new product development success显示文摘 | Islam M Z Doshi J A Mahtab H and Ahmad Z A | 2009 | International Journal of Managing Projects in Business2009，2，2： | 1 |
| 7 | Hepatotoxicity effect of some Iranian medicinal herbal formulation on rats显示文摘 | Ahmad Movahedian Sedigheh Asgary Hossein Mansoorkhani Mahtab keshvari | 2014 | Advanced Biomedical Research2014，，1： | 1 |
| 8 | 高效可回收催化剂In(OTf)_3用于无溶剂条件下Pechmann缩合反应(英文)显示文摘In(OTf)3 plays the role of a Lewis acid catalyst in the Pechmann condensation of phenols with β-ketoesters under solvent-free conditions to give coumarin derivatives. This novel and inexpensive method has advantages such as short reaction time, excellent product yields, and avoids the use of organic solvents in agreement with green chemistry principles. Catalyst loadings can be as low as 1 mol% to give high yields of the corresponding coumarins at 80 °C. The catalyst can be recovered after the reaction, and reused with only a slight decrease in the yield. | Bahador Karami Mahtab Kiani Mohsen Ahmad Hoseini | 2014 | 催化学报2014，35，7： | 1 |
| 9 | Biochar as a sorbent for contaminant management in soil and water: A review显示文摘 | Mahtab Ahmad Anushka Upamali Rajapaksha Jung Eun Lim Ming Zhang Nanthi Bolan Dinesh Mohan Meththika Vithanage Sang Soo Lee Yong Sik Ok | 2013 | Chemosphere2013，，： | 1 |
| 10 | An assessment of the utilization of waste resources for the immobilization of pb and cu in the soil from a korean military shooting range显示文摘 | Ahmad Mahtab Moon Deok Hyun Lim Kyoung Jae | 2012 | Environmental Earth Sciences2012，67，4： | 1 |
| 11 | Carbon potentials of different biochars derived from municipal solid waste in a saline soil显示文摘There are numerous studies conducted on biochar for its carbon (C) sequestration potential;however,there are limited studies available on the behavior of salt-affected soils related to biochar application.Therefore,more studies are needed to elucidate the mechanisms through which biochar affects saline soil properties.In this study,biochars were produced from solid waste at pyrolysis temperatures of 300,500,and 700?C (BC300,BC500,and BC700,respectively)and applied to a saline soil to evaluate their impacts on soil carbon dioxide (CO_(2)) efflux,C sequestration,and soil quality.A soil incubation experiment lasting for 107 d was conducted.The results showed that soil CO_(2) efflux rate,cumulative CO_(2) emission,active organic C (AOC),and organic matter (OM)significantly increased with BC300 application to a greater extent than those with BC500 and BC700 as compared to those in the no-biochar control (CK).However,soil C non-lability did not significantly increase in the treatments with biochars,except BC700,as compared to that in CK.Besides improving the soil quality by increasing the soil AOC and OM,BC300 showed positive impacts in terms of increasing CO_(2) emission from the saline soil,while BC500 and BC700 showed greater potentials of sequestering C in the saline soil by increasing the soil non-labile C fraction.The recalcitrance index (R50) values of BC500 and BC700 were>0.8,indicating their high stability in the saline soil.It could be concluded that biochars pyrolyzed at high temperatures (?500?C)could be suitable in terms of C sequestration,while biochars pyrolyzed at low temperatures (?300?C) could be suitable for improving saline soil quality. | Hamna SALEEM Mahtab AHMAD Jamshaid RASHID Munir AHMAD Mohammad I.AL-WABEL Memuna AMIN | 2022 | Pedosphere2022，32，2： | 0 |
| 12 | 利用葱和杏树胶绿色合成银纳米针(英文)显示文摘使用葱和杏树胶为原料,采用一种快速、简单和低成本的绿色方法在硝酸银溶液中合成银纳米颗粒和纳米针。葱作为还原剂,杏树胶为稳定剂和覆盖剂,银离子被还原成颗粒状和针状的银原子。利用葱或葱与杏树胶混合物合成的银纳米颗粒的直径为8~20 nm,银纳米针的直径为50~60 nm,长度为5~10μm。提出一个自组装机理来阐明球形银纳米颗粒通过杏树胶的碳链形成针状结构,通过这种方式,葱和杏树胶可将还原的银纳米颗粒转变成银纳米针。采用XRD、紫外-可见光谱、场发射电子扫描显微镜和透射电镜对所得样品进行表征。 | Mohammad Mahdi TAHERI Mohammed Rafiq ABDUL KADIR Noor Kamila AHMAD SHAFIAI Tolou SHOKUHFAR Mahtab ASSADIAN Mostafa Rezazadeh SHIRDAR | 2015 | Transactions of Nonferrous Metals Society of China2015，25，10： | 0 |
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