| 杨雪芹,王旭东.羧甲基纤维素钠与土壤复合后对吸附磷素的影响[J].干旱地区农业研究,2008,(6):97~100 |
| 羧甲基纤维素钠与土壤复合后对吸附磷素的影响 |
| Effect of carboxylmethylcellulose complexed with soil on phosphorus absoption |
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| DOI：10.7606/j.issn.1000-7601.2008.06.18 |
| 中文关键词: 羧甲基纤维素(CMC) 磷吸附 土 |
| 英文关键词:carboxylmethylcellulose（CMC） phosphorus absorption Lou soil |
| 基金项目:陕西省自然科学基金(2003C106)； 西北农林科技大学专项(01140506) |
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| 中文摘要: |
| 用不同浓度的羧甲基纤维素钠处理土壤(土),研究土被处理前后对磷素的吸附特性特征。结果表明:土壤经0.1%、0.2%CMC处理后,与对照相比,在低加入磷浓度(小于50 μg/ml)时,增加了磷的吸附量,在高加入磷浓度(大于50 μg/ml)时,减小了磷的吸附量;0.4%CMC处理土样,总体增加了磷的吸附量。吸附热力学参数显示,CMC处理土壤后(0.4%CMC处理除外),土壤对磷的最大吸附量(Xm)降低,但吸附强度和最大缓冲容量(MBC)呈增大趋势。 |
| 英文摘要: |
| Carboxylmethylcellulose was widely used as fertilizer and soil amendments for improving fertilizer utilization and soil structure．While the effect of carboxylmethylcellulose complexed with soil on nutrients absorption especially on phosphorus adsorption was less reported．In this paper Lou soil was added with carboxylmethylcellulose at different rate and phosphorus adsorption of Lou soil with or without carboxylmethylcellulose was studied．The results showed that compared with CK（Lou soil without carboxylmethylcellulose） phosphorus adsorption amount increased in Lou soil with carboxylmethylcellulose at the ratio of 0．1％ and0．2％（mass percent） when added phosphorus concentration was less then 50μg／ml but decreased when added phosphorus concentration was more then 50 μg／ml while phosphorus absorption amount by Lou soil mixed with CMC at the ratio of 0．4％ was generally increased．The thermodynamic indexes showed that although maximum absorption amount of phosphorus was decreased by soil with carboxylmethylcellulose except the treatment at the ratio of 0．4％ the absorption affinity and maximum buffer capacity were increased. |
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