Characteristics of phosphate sorption and sorbed-P release in paddy soils
Characteristics of phosphate sorption and sorbed-P release in paddy soils were studied using adsorption isotherm and ion exchange resin method. The results show that phosphate adsorption isotherm of 20 rice soils of Jinhua City of Zhejiang Province fitted in with Langmuir equation very well. The cor...
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Zhejiang University Press
2010-01-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
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| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2010.01.011 |
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| author | HE Song-duo ZHANG Qi-chun WANG Guang-huo |
| author_facet | HE Song-duo ZHANG Qi-chun WANG Guang-huo |
| author_sort | HE Song-duo |
| collection | DOAJ |
| description | Characteristics of phosphate sorption and sorbed-P release in paddy soils were studied using adsorption isotherm and ion exchange resin method. The results show that phosphate adsorption isotherm of 20 rice soils of Jinhua City of Zhejiang Province fitted in with Langmuir equation very well. The correlation coefficients were from 0.970 to 0.999. Parameters of Xm, X<sub>0.2</sub>, K and MBC (maximum buffer capacity) of the Langmuir equation might correlate with soil properties. The highest values of Xm, K, MBC and X<sub>0.2</sub> were found in red earth derived rice soils, which might relate to their high content of clay and Fe, Al oxides. Comparing with upland crops, which equilibrium P concentration of 0.2 mg·L<sup>-1</sup> may satisfy P demand for most crops, irrigated rice might need a less equilibrium P concentration in solution for its growth because the solution P could be more easily compensated through P release from soil particles in rice soils. It was found that the resin extractable P was proportional to soil adsorbed P (sum of soil Resin-P and newly adsorbed P from solution). The linear relationship was valid for all the soils studied, that is RAQ P=A+BX, where A and B are constants (r=0.941 to 0.999). It seemed that under water submerged condition, phosphate adsorbing saturation controlled the rate and quantity of P released from soil to the resin sink. Thus, for P fertilizer management in paddy soils, it pay our attention to maintain an adequate level of total soil P content or to maintain an adequate level of soil available P. |
| format | Article |
| id | doaj-art-8fcb8426d8b44bf4a7625fd9a1a1537d |
| institution | DOAJ |
| issn | 1008-9209 2097-5155 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Zhejiang University Press |
| record_format | Article |
| series | 浙江大学学报. 农业与生命科学版 |
| spelling | doaj-art-8fcb8426d8b44bf4a7625fd9a1a1537d2025-08-20T03:16:06ZengZhejiang University Press浙江大学学报. 农业与生命科学版1008-92092097-51552010-01-0136697310.3785/j.issn.1008-9209.2010.01.01110089209Characteristics of phosphate sorption and sorbed-P release in paddy soilsHE Song-duoZHANG Qi-chunWANG Guang-huoCharacteristics of phosphate sorption and sorbed-P release in paddy soils were studied using adsorption isotherm and ion exchange resin method. The results show that phosphate adsorption isotherm of 20 rice soils of Jinhua City of Zhejiang Province fitted in with Langmuir equation very well. The correlation coefficients were from 0.970 to 0.999. Parameters of Xm, X<sub>0.2</sub>, K and MBC (maximum buffer capacity) of the Langmuir equation might correlate with soil properties. The highest values of Xm, K, MBC and X<sub>0.2</sub> were found in red earth derived rice soils, which might relate to their high content of clay and Fe, Al oxides. Comparing with upland crops, which equilibrium P concentration of 0.2 mg·L<sup>-1</sup> may satisfy P demand for most crops, irrigated rice might need a less equilibrium P concentration in solution for its growth because the solution P could be more easily compensated through P release from soil particles in rice soils. It was found that the resin extractable P was proportional to soil adsorbed P (sum of soil Resin-P and newly adsorbed P from solution). The linear relationship was valid for all the soils studied, that is RAQ P=A+BX, where A and B are constants (r=0.941 to 0.999). It seemed that under water submerged condition, phosphate adsorbing saturation controlled the rate and quantity of P released from soil to the resin sink. Thus, for P fertilizer management in paddy soils, it pay our attention to maintain an adequate level of total soil P content or to maintain an adequate level of soil available P.https://www.academax.com/doi/10.3785/j.issn.1008-9209.2010.01.011rice soilphosphateadsorptiondesorption |
| spellingShingle | HE Song-duo ZHANG Qi-chun WANG Guang-huo Characteristics of phosphate sorption and sorbed-P release in paddy soils 浙江大学学报. 农业与生命科学版 rice soil phosphate adsorption desorption |
| title | Characteristics of phosphate sorption and sorbed-P release in paddy soils |
| title_full | Characteristics of phosphate sorption and sorbed-P release in paddy soils |
| title_fullStr | Characteristics of phosphate sorption and sorbed-P release in paddy soils |
| title_full_unstemmed | Characteristics of phosphate sorption and sorbed-P release in paddy soils |
| title_short | Characteristics of phosphate sorption and sorbed-P release in paddy soils |
| title_sort | characteristics of phosphate sorption and sorbed p release in paddy soils |
| topic | rice soil phosphate adsorption desorption |
| url | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2010.01.011 |
| work_keys_str_mv | AT hesongduo characteristicsofphosphatesorptionandsorbedpreleaseinpaddysoils AT zhangqichun characteristicsofphosphatesorptionandsorbedpreleaseinpaddysoils AT wangguanghuo characteristicsofphosphatesorptionandsorbedpreleaseinpaddysoils |