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Measurement of the maximum amount of water-extractable phosphorus in animal manure compost by continuous and sequential water extraction
| Content Provider | Scilit |
|---|---|
| Author | Komiyama, Teppei Ito, Toyoaki Saigusa, Masahiko |
| Copyright Year | 2014 |
| Description | Measuring the phosphorus (P) solubility in animal manure compost (AMC) is important to estimate both the risk of P loss from agricultural land and the P availability for crops in agriculture that use AMC as fertilizer. Water-extractable phosphorus (WEP) has most often been used to estimate P solubility in AMC. A single water extraction with a high ratio of compost to water is usually used to determine WEP, but in many cases, this may not evaluate the maximum WEP. In this study, we extracted the P included in AMC by using a continuous extraction method with a large amount of water, and tested this approach for 16 AMCs: four cattle manure composts, five swine manure composts, five layer (chicken) manure composts, and two broiler (chicken) litter composts. The P dissolution patterns were fitted to kinetic models, and the maximum WEP $(WEP_{max}$) was determined by the coefficient of the non-linear regression equation. The $WEP_{max}$ values corresponded to the sum of $H_{2}$O- and sodium bicarbonate $(NaHCO_{3}$)-extractable P measured using the modified Hedley sequential extraction method. The result also suggests that the maximum amount of WEP from AMC can be estimated rapidly using a sequential extraction (the Hedley method) that has been widely used to characterize P in manure or AMC. The maximum water-extractable magnesium (Mg) $(WEMg_{max}$) was significantly positively correlated with $WEP_{max}$ (r = 0.854, P < 0.01). This suggests that $WEP_{max}$ in the AMCs is affected by water-soluble magnesium compounds. |
| Related Links | http://www.tandfonline.com/doi/pdf/10.1080/00380768.2013.879836?needAccess=true |
| Ending Page | 207 |
| Page Count | 12 |
| Starting Page | 196 |
| ISSN | 00380768 |
| e-ISSN | 17470765 |
| DOI | 10.1080/00380768.2013.879836 |
| Journal | Soil Science and Plant Nutrition |
| Issue Number | 2 |
| Volume Number | 60 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2014-03-04 |
| Access Restriction | Open |
| Subject Keyword | Journal: Soil Science and Plant Nutrition Soil Science Animal Manure Compost Phosphorus Fractionation Water-extractable Phosphorus Continuous Water Extraction Nutrient Availability |
| Content Type | Text |
| Resource Type | Article |
| Subject | Soil Science Plant Science |
