Short-term alleviation of aluminum phytotoxicity by urea application in acid soils from south China
文献类型：期刊论文
| 作者 | Zeng, QR; Liao, BH; Zhang, LT; Zhou, XH; Tang, HX |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2006 |
| 卷号 | 63期号:5页码:860-868 |
| 关键词 | soils urea application pH Al toxicity |
| 英文摘要 | A laboratory experiment was conducted to study effects of urea fertilizer on the chemical composition of soil solutions over time, and to determine Al toxicity as a function of rates of urea application. The experiment revealed that addition of urea fertilizer to soils caused drastic changes in soil pH during the hydrolysis and nitrification stages of urea transformation in the experiment. These pH changes, depending on the N rate of urea application and time courses, had variable effects on soil exchangeable Al, extracted with artificial solutions containing 1 mol l(-1) KCl. The Al mobilization rate could be resolved into two phases: A declining phase for Al was attributed to the urea-induced hydrolysis while a second rising phase was dependent with the nitrification of added N fertilizer. The decreases in exchangeable Al reached the greatest in 4-7 days after fertilization, consistent with soil pH increase. Decreased Al availability had been observed as a consequence of increasing urea addition and soil pH when using Root elongation of maize seedlings as the estimators. Results from the present study demonstrate that urea fertilizer to the surface of soils may lead to a temporary immobilization of Al and, therefore, alleviated Al toxicity to plant seedlings. (c) 2005 Elsevier Ltd. All rights reserved. |
| WOS记录号 | WOS:000237648900017 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/23028]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zeng, QR,Liao, BH,Zhang, LT,et al. Short-term alleviation of aluminum phytotoxicity by urea application in acid soils from south China[J]. CHEMOSPHERE,2006,63(5):860-868. |
| APA | Zeng, QR,Liao, BH,Zhang, LT,Zhou, XH,&Tang, HX.(2006).Short-term alleviation of aluminum phytotoxicity by urea application in acid soils from south China.CHEMOSPHERE,63(5),860-868. |
| MLA | Zeng, QR,et al."Short-term alleviation of aluminum phytotoxicity by urea application in acid soils from south China".CHEMOSPHERE 63.5(2006):860-868. |
入库方式： OAI收割
来源：生态环境研究中心
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