Sulphur fractionation in calcareous soils and bioavailability to plants
文献类型：期刊论文
| 作者 | Hu, ZY; Zhao, FJ; McGrath, SP |
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2005 |
| 卷号 | 268期号:1-2页码:103-109 |
| ISSN号 | 0032-079X |
| 关键词 | bioavailability calcareous soils N form sulphur fractionation S-35 wheat |
| DOI | 10.1007/s11104-004-0229-0 |
| 通讯作者 | Zhao, FJ() |
| 英文摘要 | Sulphur fractionation and availability to plants are poorly understood in calcareous soils. Sixty-four calcareous soils containing varying amounts of CaCO3 were collected from ten provinces in China and their S fractions determined. Organic S was the predominant fraction of S, accounting for on average 77% of the soil total S. The amounts of adsorbed sulphate were found to be negligible. 1 M HCl extracted substantially more sulphate than either 0.01 M CaCl2 or 0.016 M KH2PO4, indicating the existence of water-insoluble but acid-soluble sulphate, probably in the form of sulphate co-precipitated with CaCO3. The concentrations of water-insoluble sulphate correlated positively with the contents of CaCO3 and accounted for 0.03-40.3% (mean 11.7%) of soil total S. To test the bioavailability of water-insoluble sulphate, a sulphate-CaCO3 co-precipitate labelled with S-35 was prepared and added to a calcareous soil in a pot experiment with either NH4+ or NO3- as the N source. In 29 days, wheat plants took up 10.6% and 3.0% of the S-35 added to the soil in the NH4+ and NO3- treatments, respectively. At the end of the pot experiment, the decrease of water-insoluble, acid- soluble, sulphate was more apparent in the NH4+ than in the NO3- treatment. The results indicate that sulphate co- precipitated with CaCO3 in calcareous soils may become partly available for plant uptake, depending on rhizosphere pH, if the field precipitate is similar to the laboratory prepared sample studied. |
| 收录类别 | SCI |
| WOS关键词 | ORGANIC SULFUR ; SULFATE |
| WOS研究方向 | Agriculture ; Plant Sciences |
| WOS类目 | Agronomy ; Plant Sciences ; Soil Science |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000229507800009 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558472 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Zhao, FJ |
| 作者单位 | 1.Rothansted Res, Agr & Environm Div, Harpenden AL5 2JQ, Herts, England 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, ZY,Zhao, FJ,McGrath, SP. Sulphur fractionation in calcareous soils and bioavailability to plants[J]. PLANT AND SOIL,2005,268(1-2):103-109. |
| APA | Hu, ZY,Zhao, FJ,&McGrath, SP.(2005).Sulphur fractionation in calcareous soils and bioavailability to plants.PLANT AND SOIL,268(1-2),103-109. |
| MLA | Hu, ZY,et al."Sulphur fractionation in calcareous soils and bioavailability to plants".PLANT AND SOIL 268.1-2(2005):103-109. |
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来源：南京土壤研究所
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