| 加入不同量生物质炭盐渍化土壤盐分淋洗的差异与特征 |
| |
| 引用本文： | 岳 燕,郭维娜,林启美.加入不同量生物质炭盐渍化土壤盐分淋洗的差异与特征[J].土壤学报,2014,51(4):914-919. |
| |
| 作者姓名： | 岳 燕 郭维娜 林启美 |
| |
| 作者单位： | 中国农业大学资源与环境学院,中国农业大学资源与环境学院,中国农业大学资源与环境学院 |
| |
| 基金项目： | 国家十二五科技支撑计划项目 |
| |
| 摘 要： | 生物质炭作为土壤调理剂,能够显著地改良培肥土壤,但对盐渍化土壤盐分淋洗的影响缺乏研究和了解。本研究采用土柱模拟试验,将蘑菇棒生物质炭按照不同的质量比(0%、2%、5%、10%),添加到内蒙古河套地区硫酸盐盐渍化土壤0～20 cm的土层中,并进行淋洗,测定淋出液和土壤盐分及主要盐分离子含量,以期了解生物质炭对土壤盐分和主要盐分离子洗脱的影响。结果表明:加入生物质炭的土柱,淋洗液出现的时间提前了5～36 d,电导率降低至5 mS cm-1缩短了41～100 d;生物质炭加入量越大,淋洗液出现的时间越早,电导率降低至5 mS cm-1所需的时间也越少。其中,生物质炭用量2%的处理,淋洗结束表层脱盐效果较好,含盐量与对照相比降低了34.25%。显然,向盐渍化土壤加入生物质炭,不仅能够缩短盐分洗脱时间,而且提高洗盐效率,但对盐分离子洗脱先后顺序及其速率,并没有表现出明显的影响。
|
| 关 键 词： | 盐渍化土壤 土柱 生物质炭 盐分淋洗 |
| 收稿时间： | 2013/9/11 0:00:00 |
| 修稿时间： | 2014/2/28 0:00:00 |
Salt leaching in the saline soil relative to rate of biochar applied |
| |
| Yue Yan,Guo Weina and Lin Qimei.Salt leaching in the saline soil relative to rate of biochar applied[J].Acta Pedologica Sinica,2014,51(4):914-919. |
| |
| Authors: | Yue Yan Guo Weina and Lin Qimei |
| |
| Affiliation: | College of Resources and Environment,China Agricultural University,Beijing,100193,College of Resources and Environment,China Agricultural University,Beijing,100193,College of Resources and Environment,China Agricultural University,Beijing,100193 |
| |
| Abstract: | Biochar, as a soil conditioner, can significantly improve soil fertility. But few data have been obtained on the impacts of biochar on salt leaching of saline soil. In this experiment, different rates of mushroom medium biochar (0%, 2%, 5%, 10%, w/w) were added into 0-20 cm surface soil in a sulfate saline soil column collected from Hetao Inner Mongolia. Following washing with deionized water, the eluent was collected and measured for electrical conductivity (EC) and main ions. The aim was to investigate the effect of biochar on leaching of salts and ions from the saline soil. The results showed that the eluent from biochar-amended columns appeared much earlier, by 5~36 days ahead. The duration of EC reduction to lower than 5ms/cm was shortened by 41~100 days. Moreover, the more the biochar added, the earlier the eluent was collected and the sooner the EC was reduced to lower than 5ms/cm. Biochar addition at 2% rate has a better desalting effect, and salt content in surface soil decreased by 34.25% than the control column.It was thus obvious that the biochar could shorten salt leaching time and increase salt leaching efficiency as well. However, biochar addition had not significant effect on the leaching order and rate of the salt ions. |
| |
| Keywords: | saline soil soil columns biochar salt-leaching |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《土壤学报》浏览原始摘要信息 |
|
点击此处可从《土壤学报》下载全文 |
|
