| Effect of carboxylmethylcellulose complexed with soil on phosphorus absoption |
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| DOI：10.7606/j.issn.1000-7601.2008.06.18 |
| Key Words: carboxylmethylcellulose（CMC） phosphorus absorption Lou soil |
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| Abstract: |
| 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. |