| 宁夏主要土壤的磷酸吸附特征及影响因素 |
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| 引用本文： | 孙权,韩秀云,郭晓宁.宁夏主要土壤的磷酸吸附特征及影响因素[J].土壤通报,2003,34(5):418-421. |
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| 作者姓名： | 孙权 韩秀云 郭晓宁 |
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| 作者单位： | 1. 宁夏大学农学院农学系,宁夏,永宁,750105
2. 宁夏银川市环境监测中心站 |
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| 基金项目： | 国家自然科学基金(40161005) |
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| 摘 要： | 本文研究了宁夏10种主要土壤对磷的等温吸附特征,结果表明,宁夏主要土壤的等温吸附曲线与Langmuir等温吸附方程吻合。最大吸附磷量(Xmax)介于99.0～666.6μg/g之间,与土壤物理性粘粒的含量呈极显著相关。根据吸附指标预测的施磷量为54-77kg/hm2,与肥效函数法确定的用量较一致。
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| 关 键 词： | 宁夏 石灰性土壤 吸附 施磷量 |
| 文章编号： | 0564-3945(2003)05-0418-04 |
| 修稿时间： | 2001年11月29 |
Study on Phosphorus Adsorption and Application by the Major Soils of Ningxia |
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| SUN Quan,HAN Xiou - yun,GUO Xiao - ning.Study on Phosphorus Adsorption and Application by the Major Soils of Ningxia[J].Chinese Journal of Soil Science,2003,34(5):418-421. |
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| Authors: | SUN Quan HAN Xiou - yun GUO Xiao - ning |
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| Abstract: | The characteristics of phosphorus adsorption isotherms by 10 soils of Ningxia were studied. The result indicated that the adsorption curves of the soils were fitted with Langmuir adsorption isotherm equation (IAE). The maximum P adsorption values were from 99. 0 to 666. 6 μg/g, being positively significantlg correlated with soil physical clay contents. According to the IAE, we predicted that the phosphoric fertilizer application amount was 54 to 77kg/hm2 in the major soils of Ningxia, being consistent with the amount defined by the methods of fertilizer efficiencies function. |
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| Keywords: | Ningxia Calcareous soil Adsorption P fertilizer application amount |
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