Low-molecular-weight organic acids as a phosphorus nutrient amendment for Solanum melongena production in calcareous soils of the Central Texas Region
| dc.contributor.advisor | Mix, Ken | |
| dc.contributor.author | Osorio, Dagoberto J. | |
| dc.contributor.committeeMember | Booth, Chad | |
| dc.contributor.committeeMember | Fulton, Lawrence | |
| dc.date.accessioned | 2017-09-06T21:03:11Z | |
| dc.date.available | 2017-09-06T21:03:11Z | |
| dc.date.issued | 2015-05 | |
| dc.description.abstract | Phosphorus (P) is a vital component for crop production systems and a non-renewable fertilizer resource. Although P applications to farms has been considered a root cause of increased global yields, it has come at the expense of increased phosphate rock (PR) depletion, the main derivative of P fertilizers which is estimated to decline by 2050. On the other hand, soils frequently contain enough native P for production yet it is unavailable due to P fixation. Low-molecular-weight organic acids (LMWOA) are largely responsible for mineralizing P in the soil rhizosphere and making it plant available in soil solution. This study investigated the potential of two LMWOAs, oxalic and citric acid, to mineralize fixed P in bulk soils and the effects on production of eggplant. Two calcareous soils were used, including an alkaline (pH 7.6-7.8) vertisol from the Houston Black series and a slightly acidic (pH 6.5-6.8) mollisol from the Tarpley soil series. Results showed oxalic and citric acid in the high pH calcareous soil mineralized P in amounts equivalent to applied triple superphosphate (TSP) fertilizer (p > 0.05) while eggplant yields indicated no significant difference (p > 0.05) between LMWOA applications and TSP fertilizer. In the low pH calcareous soil, LMWOA treatments were significantly less effective at mineralizing native soil P and matching eggplant yield (p < 0.05) when compared to TSP fertilizer applications. | |
| dc.description.department | Agricultural Sciences | |
| dc.format | Text | |
| dc.format.extent | 128 pages | |
| dc.format.medium | 1 file (.pdf) | |
| dc.identifier.citation | Osorio, D. J. (2015). Low-molecular-weight organic acids as a phosphorus nutrient amendment for Solanum melongena production in calcareous soils of the Central Texas Region (Unpublished thesis). Texas State University, San Marcos, Texas. | |
| dc.identifier.uri | https://hdl.handle.net/10877/6825 | |
| dc.language.iso | en | |
| dc.subject | citric acid | |
| dc.subject | oxalic acid | |
| dc.subject | phosphorus | |
| dc.subject | P fixation | |
| dc.subject | calcareous soils | |
| dc.subject | low-molecular-weight organic acids | |
| dc.subject | eggplant production | |
| dc.subject | vertisol | |
| dc.subject | mollisol | |
| dc.title | Low-molecular-weight organic acids as a phosphorus nutrient amendment for Solanum melongena production in calcareous soils of the Central Texas Region | |
| dc.type | Thesis | |
| thesis.degree.department | Agriculture | |
| thesis.degree.discipline | Agricultural Education | |
| thesis.degree.grantor | Texas State University | |
| thesis.degree.level | Masters | |
| thesis.degree.name | Master of Education |