| 中国青海湖地区草地蝗虫与土壤的关系 |
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| 作者姓名： | NI Shao-Xiang WANG Jie-Chen JIANG Jian-Jun ZHA Yong |
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| 作者单位： | Department of Soil Science, University of Saskatchewan, Saskatoon, S7N 5A8 （Canada） |
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| 基金项目： | Project supported by the Potash and Phosphate Institute of Canada （PPIC）. |
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| 摘 要： | A growth chamber study was conducted to determine the relationships between the supply of soil available nitrogen （N） and sulfur （S） and canola （Brassica napus） and wheat （Triticum aestivum L. ‘Biggar＇） N and S uptake and yield in three Western Canadian soils. The suitability of one-hour burial with an anion exchange membrane （AEM） was assessed for its utility as a quick test of the available N：S balance in the soil. Canola and wheat were grown on a Luvisolic soil low in available S and on Brown and Black Chernozemic soils low in both available N and S, with different rates and combinations of N and S fertilizers applied. AEM burial was used to assess soil available nitrate and sulfate supply rates after fertilization. Dry matter yield and N and S concentrations in plant tissues were determined after 6 weeks of growth. The soil available N：S ratio determined by AEM burial closely reflected the relative supplies of available N and S as revealed in the N：S ratios of plant tissue dry matter. The highest yields were achieved where the available N：S ratio in soil and plant tissue ranged from 5 to 13. Thus, a one-hour burial of an AEM probe in the field may be a useful tool to quickly test if a balanced N and S supply is present in the soil for optimum crop yield.
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| 关 键 词： | 阴离子 土壤质量 冲击作用 施肥技术 小麦 |
| 收稿时间： | 2006-05-08 |
| 修稿时间： | 2006-10-06 |
Rangeland grasshoppers in relation to soils in the Qinghai Lake region, China |
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| NI Shao-Xiang,WANG Jie-Chen,JIANG Jian-Jun,ZHA Yong.Rangeland grasshoppers in relation to soils in the Qinghai Lake region, China[J].Pedosphere,2007,17(1):84-89. |
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| Authors: | NI Shao-Xiang WANG Jie-Chen JIANG Jian-Jun and ZHA Yong |
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| Institution: | College of Geographical Science, Nanjing Normal University, Nanjing 210097 (China). E-mail: sxni@njnu.edu.cn;Department of Urban and Resources Science, Nanjing University, Nanjing 210093 (China);College of Geographical Science, Nanjing Normal University, Nanjing 210097 (China). E-mail: sxni@njnu.edu.cn;College of Geographical Science, Nanjing Normal University, Nanjing 210097 (China). E-mail: sxni@njnu.edu.cn |
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| Abstract: | A growth chamber study was conducted to determine the relationships between the supply of soil available nitrogen (N) and sulfur (S) and canola (Brassica napus) and wheat (Triticum aestivum L. 'Biggar') N and S uptake and yield in three Western Canadian soils. The suitability of one-hour burial with an anion exchange membrane (AEM) was assessed for its utility as a quick test of the available NS balance in the soil. Canola and wheat were grown on a Luvisolic soil low in available S and on Brown and Black Chernozemic soils low in both available N and S, with different rates and combinations of N and S fertilizers applied. AEM burial was used to assess soil available nitrate and sulfate supply rates after fertilization. Dry matter yield and N and S concentrations in plant tissues were determined after 6 weeks of growth.The soil available NS ratio determined by AEM burial closely reflected the relative supplies of available N and S as revealed in the NS ratios of plant tissue dry matter. The highest yields were achieved where the available NS ratio in soil and plant tissue ranged from 5 to 13. Thus, a one-hour burial of an AEM probe in the field may be a useful tool to quickly test if a balanced N and S supply is present in the soil for optimum crop yield. |
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| Keywords: | anion exchange membrane canola N S wheat |
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