title: Novel Applications for Oxalate-Phosphate-Amine Metal-Organic-Frameworks (OPA-MOFs): Can an Iron-Based OPA-MOF Be Used as Slow-Release Fertilizer?
abstract: A porous iron-based oxalate-phosphate-amine metal-organic framework material (OPA-MOF) was investigated as a microbially-induced slow-release nitrogen (N) and phosphorus (P) fertilizer. Seedling growth, grain yields, nutrient uptake of wheat plants, and soil dynamics in incubated soil, were investigated using OPA-MOF vs standard P (triple-superphosphate) and N (urea) fertilizers in an acidic Ferralsol at two application rates (equivalent 120 and 40 kg N ha(-1)). While urea hydrolysis in the OPA-MOF treatment was rapid, conversion of ammonium to nitrate was significantly inhibited compared to urea treatment. Reduced wheat growth in OPA-MOF treatments was not caused by N-deficiency, but by limited P-bioavailability. Two likely reasons were slow P-mobilisation from the OPA-MOF or rapid P-binding in the acid soil. P-uptake and yield in OPA-MOF treatments were significantly higher than in nil-P controls, but significantly lower than in conventionally-fertilised plants. OPA-MOF showed potential as enhanced efficiency N fertilizer. However, as P-bioavailability was insufficient to meet plant demands, further work should determine if P-availability may be enhanced in alkaline soils, or whether central ions other than Fe, forming the inorganic metal-P framework in the MOF, may act as a more effective P-source in acid soils.
authors.affiliation: School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, 2480, Australia.
authors.forename: Manuela
authors.initials: M
authors.lastname: Anstoetz
authors.affiliation: Southern Cross Plant Science, Southern Cross University, Lismore, NSW, 2480, Australia.
authors.forename: Terry J
authors.initials: TJ
authors.lastname: Rose
authors.affiliation: School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, 2480, Australia.|Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, 2480, Australia.
authors.forename: Malcolm W
authors.initials: MW
authors.lastname: Clark
authors.affiliation: School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, 2480, Australia.|Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, 2480, Australia.
authors.forename: Lachlan H
authors.initials: LH
authors.lastname: Yee
authors.affiliation: Southern Cross Plant Science, Southern Cross University, Lismore, NSW, 2480, Australia.
authors.forename: Carolyn A
authors.initials: CA
authors.lastname: Raymond
authors.affiliation: Southern Cross Plant Science, Southern Cross University, Lismore, NSW, 2480, Australia.|NSW Department of Primary Industries, Wollongbar Primary Industries Institute, Wollongbar, NSW, 2477, Australia.
authors.forename: Tony
authors.initials: T
authors.lastname: Vancov
mesh_terms: D000588:Amines; D005308:Fertilizers; D007501:Iron; D010070:Oxalates; D010710:Phosphates; D012987:Soil; D014908:Triticum / Q000254:growth & development*
chemical_list: D000588:Amines; D005308:Fertilizers; D010070:Oxalates; D010710:Phosphates; D012987:Soil; D007501:Iron