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| 1 | Proton accumulation accelerated by heavy chemical nitrogen fertilization and its long-term impact on acidifying rate in a typical arable soil in the Huang-Huai-Hai Plain显示文摘Cropland productivity has been significantly impacted by soil acidification resulted from nitrogen(N) fertilization, especially as a result of excess ammoniacal N input. With decades' intensive agricultural cultivation and heavy chemical N input in the Huang-Huai-Hai Plain, the impact extent of induced proton input on soil p H in the long term was not yet clear. In this study, acidification rates of different soil layers in the soil profile(0–120 cm) were calculated by p H buffer capacity(p HBC) and net input of protons due to chemical N incorporation. Topsoil(0–20 cm) p H changes of a long-term fertilization field(from 1989) were determined to validate the predicted values. The results showed that the acid and alkali buffer capacities varied significantly in the soil profile, averaged 692 and 39.8 mmolc kg–1 p H–1, respectively. A significant(P<0.05) correlation was found between p HBC and the content of calcium carbonate. Based on the commonly used application rate of urea(500 kg N ha–1 yr–1), the induced proton input in this region was predicted to be 16.1 kmol ha–1 yr–1, and nitrification and plant uptake of nitrate were the most important mechanisms for proton producing and consuming, respectively. The acidification rate of topsoil(0–20 cm) was estimated to be 0.01 unit p H yr–1 at the assumed N fertilization level. From 1989 to 2009, topsoil p H(0–20 cm) of the long-term fertilization field decreased from 8.65 to 8.50 for the PK(phosphorus, 150 kg P2O5 ha–1 yr–1; potassium, 300 kg K2 O ha–1 yr–1; without N fertilization), and 8.30 for NPK(nitrogen, 300 kg N ha–1 yr–1; phosphorus, 150 kg P2O5 ha–1 yr–1; potassium, 300 kg K2 O ha–1 yr–1), respectively. Therefore, the apparent soil acidification rate induced by N fertilization equaled to 0.01 unit p H yr–1, which can be a reference to the estimated result, considering the effect of atmospheric N deposition, crop biomass, field management and plant uptake of other nutrients and cations. As protons could be consumed by some field practices, such as stubble return and coupled water and nutrient management, soil p H would maintain relatively stable if proper management practices can be adopted in this region. | HUANG P ing ZHANG Jia-bao XIN Xiu-li ZHU An-ning ZHANG Cong-zhi MA Dong-hao ZHU Qiang-gen YANG Shan WU Sheng-jun | 2015 | Journal of Integrative Agriculture2015，14，1： | 18 |
| 2 | A model for evaluation the phytoavailability of trace elements to vegetables under the field conditions 显示文摘 | WANG X P SHAN X Q ZHANG S Z | 2004 | Chemosphere2004，46，： | 1 |
| 3 | The Cretaceous volcanic succession around the Songliao Basin,NE China:Relationship between volcanism and sedimentation显示文摘 | Wang P Ren Y Shan X | 2002 | Geological Journal2002，37，2： | 1 |
| 4 | Genetic analysis of a novel dominant rice dwarf mutant 986083D显示文摘 | Qin R Z Qiu Y Cheng Z J Shan X Y Guo X P Zhai H Q Wan J M | 2008 | Euphytica2008，160，： | 1 |
| 5 | Positive solutions for second-order m-point boundary value problems显示文摘 | Guo Y P Shan W R Ge W G | 2003 | J Comput ApplMath2003，151，2： | 1 |
| 6 | Nutritional status deteriorates as the severity of diabetic foot ulcers increases and independently associates with prognosis 显示文摘 | Shan Z Zheng T Fang P | 2013 | Exp Ther Med2013，5，1： | 1 |
| 7 | Facial expression recognition based on local Binary patterns: a com- prehensive study 显示文摘 | SHAN C GONG S WMCOWAN P | 2009 | Image and Vision Computing2009，27，6： | 1 |
| 8 | Carbon monoxide differentially modulates STAT1 and STAT3 and inhibits apoptosis via a phosphatidylinositol 3-kinase/Akt and p38 kinase-dependent STAT3pathway during anoxia-reoxygenation injury显示文摘 | Zhang X Shan P Alam J | 2005 | J Biol Chem2005，280，10： | 1 |
| 9 | Reactive oxygen species and extracellular signa-regulated kinase 1/2 mitogen-activated protein kinase mediate hyperoxia-unduced cell death in lung epithelium显示文摘 | Zhang X Shan P Sasidhar M | 2003 | Am J Respir Cell Mol Biol2003，28，3： | 1 |
| 10 | A conjugate augmented approach to direction-of-arrival estimation显示文摘 | SHAN Zhilong YUM T S P | 2005 | IEEE Transactions on Signal Processing2005，53，11： | 1 |
| 11 | Endothelial MKK3 is a critical mediator of lethal murine endotoxemia and acute lung injury显示文摘 | Mannam P Zhang X Shan P | 2013 | J Immunol2013，190，3： | 1 |
| 12 | Adsorption Behavior of Phosphate on Lanthanum(Ⅲ)-coordinated Diamino-functionalized 3D Hybrid Mesoporous Silicates显示文摘 | Zhang J D Shen Z M Shan W P | 2011 | Journal of Hazardous materials2011，186，1： | 1 |
| 13 | Preliminary safety evaluationfor CSR1000 with passive safety system显示文摘 | Wu P Gou J Shan J | 2014 | Annals ofNuclear Energy2014，65，： | 1 |
| 14 | Myostatin knockout drives browningof white adipose tissue through activating the AMPK- PGClct-Fndc5 pathway in muscle 显示文摘 | Shan T Liang X Bi P | 2013 | FASEB J2013，27，5： | 1 |
| 15 | Mu-Calpain mediates hippocampal neuro death in rats after lithium-pilocarpine-induced status epilepticus显示文摘 | Wang S Wang S Shan P | 2008 | Brain Research Bulletin2008，76，12： | 1 |
| 16 | Investigation of semiconducting YBaCuO thin films: a new room temperature bolometer 显示文摘 | SHAN P C CELIK-BUTLER Z BUTLER D P | 1996 | J of Applied Physics1996，80，12： | 1 |
| 17 | Solvent-assisted low pressure room temperature lamination of low temperature cofirable ceramic green tapes for formation of embedded micro channels显示文摘 | Shan Xuechuan Maw H P Lu C W | | 0，，8： | 1 |
| 18 | Near-lnfrared Sunlight Harvesting in DyeSensitized Solar Cells Via the Insertion of an Upconverter-TiO2 Nanocomposite Layer 显示文摘 | Guo-Bin Shan George P Demopoulos | 2010 | Advanced Materials2010，22，： | 1 |
| 19 | Carbon monoxide modulates Fas/Fas ligand, caspases, and Bcl-2 family proteins via the p38a mitogen-activated protein kinase pathway during ischemiareperfusion lung injury 显示文摘 | Zhang X Shan P Alam J | 2003 | J Biol Chem2003，278，22： | 1 |
| 20 | 显示文摘 | Luo M Ying P | 2003 | Appl Catal A2003，246，： | 1 |
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