| 不同质地棉田土壤对磷吸附与解吸研究 |
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| 引用本文： | 陈波浪,盛建东,蒋平安,刘永刚.不同质地棉田土壤对磷吸附与解吸研究[J].土壤通报,2010(2). |
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| 作者姓名： | 陈波浪 盛建东 蒋平安 刘永刚 |
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| 作者单位： | 新疆农业大学草业与环境科学学院; |
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| 基金项目： | 新疆自治区高等学校科研计划重点项目(XJEDU2006I29); 新疆自治区“十一五”重大专项“棉花生产关键技术开发、集成与示范”中的课题“棉田水肥高效利用调控技术开发”(200731133-2); 新疆自治区土壤学重点学科资助 |
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| 摘 要： | 研究了不同质地棉田土壤对磷吸附与解吸的影响。结果表明:不同质地磷素等温吸附曲线与Langmuir、Temkin和Freundlich方程拟合度都达极显著水平,尤以Langmuir方程拟合度最高,相关系数均在0.94以上;磷吸持指数(PSI)、土壤最大缓冲容量(MBC)和吸附量均随粘粒含量的增加而增大,即粘土壤土砂壤土,而易解吸磷(RDP)、解吸量、解吸率和标准需磷量(SPR)呈下降趋势,即砂壤土壤土粘土。以Langmuir方程估算棉田土壤的需磷量,砂壤质棉田需磷量为12.87mgkg-1,壤质棉田需磷量为12.66mgkg-1,粘质棉田需磷量为10.00mgkg-1。
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| 关 键 词： | 棉田 磷素 质地 吸附与解吸 需磷量 |
Study on Characteristics of Phosphorus Adsorption and Desorption of Cotton Field with Different Soil Textures |
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| CHEN Bo-lang,SHENG Jian-dong,JIANG Ping-an,LIU Yong-gang.Study on Characteristics of Phosphorus Adsorption and Desorption of Cotton Field with Different Soil Textures[J].Chinese Journal of Soil Science,2010(2). |
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| Authors: | CHEN Bo-lang SHENG Jian-dong JIANG Ping-an LIU Yong-gang |
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| Institution: | CHEN Bo-lang,SHENG Jian-dong,JIANG Ping-an,LIU Yong-gang(Faulty of Grassl, , Environment Sciences,Xinjiang Agricultural University,Urumqi Xinjiang 830052,China) |
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| Abstract: | In this paper,characteristics of phosphate adsorption and desorption of cotton field under different soil textures was studied.The results showed that:the adsorption curve of P were identical with the Langmuir equation,Temkin equation and Freundlich equation,and the correlation coefficients of all samples were significant at 0.01 level.Above all,the Langmuir equation is the best one and its correlation coeffieient is above 0.94.The order of phosphorus sorption index(PSI),max buffer capacity(MBC)and phosphor... |
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| Keywords: | Cotton field Phosphorus Texture Adsorption and desorption Phosphorus requirement |
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