| Full text | |
| Author(s): |
Silva, Iris Amanda A.
[1]
;
de Macedo, Osmir Fabiano L.
[1]
;
Cunha, Graziele C.
[1]
;
Oliveira, Rhayza Victoria Matos
[1]
;
Romao, Luciane P. C.
[2, 1]
Total Authors: 5
|
| Affiliation: | [1] Fed Univ Sergipe UFS, Dept Chem, BR-49100000 Sao Cristovao, SP - Brazil
[2] UNESP, Inst Chem, Natl Inst Alternat Technol Detect Toxicol Evaluat, POB 355, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Cellulose; v. 28, n. 6 MAR 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Urea-based multi-coated slow release fertilizer was produced using water hyacinth, humic substances, and chitosan, with water rich in natural organic matter as a solvent. Elemental analysis showed that the nitrogen content of the fertilizer (FERT) was around 20%. Swelling tests demonstrated the effectiveness of the water hyacinth crosslinker, which reduced the water permeability of the material. Leaching tests showed that FERT released a very low concentration of ammonium (0.82 mg L-1), compared to the amount released from urea (43.1 mg L-1). No nitrate leaching was observed for FERT, while urea leached 13.1 mg L-1 of nitrate. In water and soil, FERT showed maximum releases after 30 and 40 days, respectively, while urea reached maxima in just 2 and 5 days, respectively. The results demonstrated the promising ability of FERT to reduce nitrogen losses, as well as to minimize environmental impacts in the soil-plant-atmosphere system and to improve the efficiency of nitrogen fertilization. {[}GRAPHICS] . (AU) | |
| FAPESP's process: | 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies |
| Grantee: | Maria Valnice Boldrin |
| Support Opportunities: | Research Projects - Thematic Grants |