Quenching of phosphorus fixation with organic wastes in a bauxite mine overburden |
| |
Authors: | Vincent Fitzgerald Wright Bryson Alando Brown Mark Anglin Harris |
| |
Institution: | (1) College of Natural and Applied Sciences, Northern Caribbean University, Mandeville, Jamaica, WI; |
| |
Abstract: | Capabilities of two phosphate-rich organic wastes to quench phosphorus (P) fixation in a stored high-phosphorus-fixing tropical
bauxite overburden were examined in a field experiment. Prior grinding and ensiling of shrimp shell waste facilitated increased
solubility and hence phosphorus fixation quenching in the soil. Normal plant-available P concentrations were exhibited by
the overburden for up to 4 months after application despite the cultivation and harvesting of plants in the treated beds.
Ten-year-old, stored overburden treated with ensiled shrimp shell silage, or chicken manure exhibited P levels of 1.0 and
1.1%, respectively, 4 months after treatment application. This represents a small excess over normal concentrations of free
P in the overburdens. These P levels dropped to 0.055 and 0.060%, respectively, after 8 months. The capacity of the soil to
fix phosphorus was thus rapidly “filled” with an excess of P in the overburden. However, increased P fixation in the second
4-month period was attributed to the inherently high levels of Ca2+ in the ground. Therefore, amelioration based on quarterly applications promises a long-term corrective for P-fixing in stored
bauxite overburdens. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|