Suitability of soil electrical conductivity as an indicator of soil nitrate status in relation to vegetable cultivation practices in the yangtze river delta of china
文献类型：期刊论文
| 作者 | Shi, Yi-Chao1,2; Hu, Zheng-Yi1,2; Haneklaus, Silvia3; Long, Wei-Guo2,4; Xia, Xu2; Zhao, Yan-Wen4; Lin, Tian2; Schnug, Ewald3 |
| 刊名 | Landbauforschung volkenrode
 |
| 出版日期 | 2009-06-01 |
| 卷号 | 59期号:2页码:151-158 |
| ISSN号 | 0458-6859 |
| 关键词 | Codes of good agricultural practice (gap) Eutrophication Foil tunnel Geo-electric sensor Site-specific nutrient management Secondary salinization |
| 通讯作者 | Shi, yi-chao() |
| 英文摘要 | In soil samples from sites where vegetables were grown in foil tunnels and open fields. chemical soil analysis comprised the parameters electrical conductivity(ec), ph, no(3)-n, nh(4)-n, total n and organic matter. cultivation practices had no influence on soil ph values. in comparison, ec was significantly higher with 462.5 mu s/cm in soils under foil tunnels than in open fields with a mean value of 251.2 mu s/cm. about one third (35 %) of all samples showed secondary salinization with ec values > 500 mu s/cm under foil tunnels, and still 9 % of all samples from field-grown vegetables. soil ec values increased with the time period of vegetable growing and exceeded 500 mu s/cm after more than 4 years of continuous cultivation. a highly significant correlation p < 0.001) was determined between soil no(3)-n and soil ec irrespective of the cultivation practice if ec was <500 mu s/cm, while no relationship existed in soils with ec values >500 mu s/cm. the results suggest that no(3)-n is a main factor influencing ec values, but no(3)-n is of minor relevance for the complex phenomenon of secondary salinization as found in soils under foil tunnels. this implies that a reduction of the n fertilizer input is not sufficient to decrease ec values in these production units. soil ec values might be used as an indicator for excessive no(3)-n soil contents and as a benchmark for calculating site-specific n rates. thus crop productivity and quality parameters of vegetables can be improved and environmental burdens, for example n loads to water bodies significantly reduced. |
| WOS关键词 | PADDY SOIL ; GROUNDWATER ; SALINITY ; CONTAMINATION ; ENVIRONMENT ; SYSTEMS ; FIELD ; LAND |
| WOS研究方向 | Agriculture |
| WOS类目 | Agriculture, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | FORSCHUNGSANSTALT FUR LANDWIRT BRAUNSCHWEIG VOLKENRODE |
| WOS记录号 | WOS:000269342400007 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2401837 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Shi, Yi-Chao |
| 作者单位 | 1.Chinese Acad Sci, Grad Univ, Coll Resources & Environm, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 3.Fed Res Ctr Cultivated Plants, Inst Crop & Soil Sci, JKI, D-38116 Braunschweig, Germany 4.Nanjing Agr Univ, Nanjing 210095, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shi, Yi-Chao,Hu, Zheng-Yi,Haneklaus, Silvia,et al. Suitability of soil electrical conductivity as an indicator of soil nitrate status in relation to vegetable cultivation practices in the yangtze river delta of china[J]. Landbauforschung volkenrode,2009,59(2):151-158. |
| APA | Shi, Yi-Chao.,Hu, Zheng-Yi.,Haneklaus, Silvia.,Long, Wei-Guo.,Xia, Xu.,...&Schnug, Ewald.(2009).Suitability of soil electrical conductivity as an indicator of soil nitrate status in relation to vegetable cultivation practices in the yangtze river delta of china.Landbauforschung volkenrode,59(2),151-158. |
| MLA | Shi, Yi-Chao,et al."Suitability of soil electrical conductivity as an indicator of soil nitrate status in relation to vegetable cultivation practices in the yangtze river delta of china".Landbauforschung volkenrode 59.2(2009):151-158. |
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来源：中国科学院大学
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