石灰和聚丙烯酰胺对氮素在酸性土壤中吸附-解吸和迁移的影响

为了探讨南方烟区酸性土壤的改良途径，通过吸附-解吸试验和淋溶试验，研究了石灰和聚丙烯酰胺（PAM）对植烟酸性土壤N素的吸附、解吸和迁移率的影响。结果表明：Langmuir方程可以很好地表征酸性土壤、石灰和PAM处理的酸性土壤对N的吸附特征；单独用石灰处理及同时用石灰和PAM处理均能增加植烟酸性土壤对N的吸附量、吸附常数和最大缓冲容量，以石灰含量为0．45％、PAM含量为0．1％的处理土壤吸附量最高，但随着PAM用量增加，吸附量下降；石灰和PAM处理的土壤对N的解吸率总体比对照低，但解吸量高于对照；施加石灰含量为0．45％、PAM含量为0．1％的处理，土壤能有效缓解NH4^＋-N、NO3^--N...

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Published in西南农业学报 Vol. 25; no. 6; pp. 2198 - 2202
Main Author 陈世军 潘文杰 孟玉山 宗学凤 王三根
Format Journal Article
LanguageChinese
Published 西南大学农学与生物科技学院,重庆北碚400716%贵州省烟草科学研究所,贵州贵阳,550081%西南大学农学与生物科技学院,重庆北碚,400716 2012
黔南民族师范学院生命科学系,贵州都匀558000
Subjects
氮素
石灰
聚丙烯酰胺
酸性土壤
酸性土壤
石灰
聚丙烯酰胺
氮素
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ISSN1001-4829

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Summary:为了探讨南方烟区酸性土壤的改良途径，通过吸附-解吸试验和淋溶试验，研究了石灰和聚丙烯酰胺（PAM）对植烟酸性土壤N素的吸附、解吸和迁移率的影响。结果表明：Langmuir方程可以很好地表征酸性土壤、石灰和PAM处理的酸性土壤对N的吸附特征；单独用石灰处理及同时用石灰和PAM处理均能增加植烟酸性土壤对N的吸附量、吸附常数和最大缓冲容量，以石灰含量为0．45％、PAM含量为0．1％的处理土壤吸附量最高，但随着PAM用量增加，吸附量下降；石灰和PAM处理的土壤对N的解吸率总体比对照低，但解吸量高于对照；施加石灰含量为0．45％、PAM含量为0．1％的处理，土壤能有效缓解NH4^＋-N、NO3^--N向深层土壤迁移的趋势。
Bibliography:Lime; Polyacrylamide; Acid soil ; Nitrogen
CHEN Shi-jun, PAN Wen-jie, MENG Yu-shan,ZONG Xue-feng, WANG San-gen （ 1. Department of Life Sciences, Qiannan National Normal College, Guizhou Duyun 558000, Cina ;2. College of Agronomy and Biotechnlo- by, Southwest University, Chongqing Beibei 400716, China ;3. Guizhou Tobacco Research Institute, Guizhou Guiyang 550081, China）
51-1213/S
The nitrogen adsorption, desorption and leaching experiments were conducted to study the effects of lime and polyacrylamide on nitrogen adsorption, desorption and translocation in acid soil, so as to explore the improvement way of acid soil in the southern tobacco-grown area. The results showed that Langmuir isotherm equation could well describe the soil adsorption characteristics. Application of lime and PAM in acid soil could increase adsorption quantity, maximum adsorption quantity, adsorption capacity and maximum buffer capacity, and the adsorption quantity of nitrogen had reached the maximum at 0.45 % lime and 0. 1% PAM, then desce
ISSN:1001-4829