Abstract
Partial acidulation of phosphate rock (PR) or compaction of PR with soluble P fertilizers can improve the usefulness of unreactive PR for use as P fertilizer. A greenhouse study was conducted to evaluate nonconventional phosphate fertilizers derived from a low reactive Sukulu Hills PR from Uganda. Raw PR (which contained 341.0 g kg−1 Fe2O3), beneficiated or concentrate PR, partially acidulated PR (PAPR) and PR compacted with triple superphosphate (TSP) were evaluated. Compacted materials had a P ratio of PR:TSP = 50:50. PAPR materials were made by 50% acidulation with H2SO4. TSP was used as a reference fertilizer. Fertilizers were applied to an acidic (pH = 5.4) Hiwassee loam (clayey, kaolinitic, thermic Rhodic Kanhapludults) at rates of 0, 50, 100, 200, 300 and 400 mg P kg−1 soil. Two successive corn (Zea mays L.) crops were grown for 6 weeks. Compacted concentrate PR + TSP and raw PR + TSP were 94.4 and 89.7% as effective as TSP, respectively, in increasing dry-matter yields for the first corn crop. PAPR from the concentrate was 54.8% as effective as TSP. Raw PR, concentrate PR and the PAPR from the raw PR were ineffective in increasing dry-matter yields. The same trends were obtained when P uptake was used to compare effectiveness. Ineffectiveness of the raw PR and its corresponding PAPR was attributed to a high Fe2O3 content in the raw PR. Bray I and Pi paper were found to be nearly equally suitable at estimating available P in the soils treated with responsive fertilizer materials. Mehlich 1 overestimated available P in soil treated with raw PR, concentrate PR or the PAPR from the raw PR.
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References
Allen SE, Terman GL and Clements LB (1976) Greenhouse techniques for soil-plant-fertilizer research. NFDC-TVA Bulletin Y-104
AOAC (1984) Official methods of analysis. 14th ed. Association of Official Agricultural Chemists, Arlington, VA, USA
Barnhisel R and Bertsch PM (1982) Aluminum. In Page ALet al. (eds). Methods of soil analysis. Part 2. 2nd ed Agronomy 9: 275-300. ASA, CSSA, and SSSA, Madison, WI, USA
Bationo A, Chien SH, Henao J, Christianson CB and Mokwunye AU (1990) Agronomic evaluation of two unacidulated and partially acidulated phosphate rocks indigenous to Niger. Soil Sci Soc Am J 54: 1772–1777
Bolan NS, Hedley MJ, Harrison R and Braithwaite AC (1990) Influence of manufacturing variables on characteristics and the agronomic value of partially acidulated phosphate fertilizers. Fert Res 26: 119–138
Bray RH and Kurtz LT (1945) Determination of total, organic, and available forms of phosphorus in soils. Soil Sci 59: 39–45
Chien SH, Sompongse D, Henao J and Hellums DT (1987) Greenhouse evaluation of phosphorus availability from compacted phosphate rocks with urea or with urea and triple superphosphate. Fert Res 14: 245–256
Chien SH and Hammond LL (1988) Agronomic evaluation of partially acidulated phosphate rocks in the tropics. IFDC's experience. Paper series IFDC-P7. IFDC, Muscle Shoals, AL
Chien SH, Sale PWG and Friesen DK (1990) A discussion of the methods for comparing the relative effectiveness of phosphate fertilizers varying in solubility. Fert Res 24: 149–157
Day PR (1965) Particle fractionation and particle-size analysis. In: Black CAet al. (ed.) Methods of soil analysis. Part 1. Agronomy Monograph 9: 545-565. ASA, CSSA, SSSA, Madison, WI, USA
Hammond LL, Chien SH and Mokwunye AU (1986) Agronomic value of unacidulated and partially acidulated phosphate rocks indigenous to the tropics. Adv Agron 40: 89–140
Hammond LL, Chien SH, Roy AH and Mokwunye AU (1989) Solubility and agronomic effectiveness of partially acidulated phosphate rocks as influenced by their iron and aluminum oxide content. Fert Res 19: 93–98
Holmgren GGS, Juve RL and Geschwender RC (1977) A mechanically controlled variable rate leaching device. Soil Sci Soc Am J 41: 1207–1208
Hue NV and Evans CE (1986) Procedures used for soil and plant analysis by the Auburn University Soil Testing Laboratory. Dep Ser 106. Alabama Agric Exp Stn, USA
Jackson ML (1956) Soil Chemical Analysis - Advanced Course. (Fifth printing 1969). Published by the author, Department of Soil Science, Madison, WI. 53706 USA
Khasawneh FE and Doll EC (1978) The use of phosphate rock for direct application to soils. Adv Agron 30: 159–206
Kisitu VB (1991) Fertilizer material occurrences in Uganda. Fert Res 30: 187–189
Kpomblekou K, Chien SH, Henao J, and Hill WA (1991) Greenhouse evaluation of phosphate fertilizers produced from Togo phosphate rock. Commun in Soil Sci Plant Anal 22: 63–73
Lehr JR and McClellan GH (1972) A revised laboratory reactivity scale for evaluating phosphate rocks for direct application. Bull Y-43, TVA-NFDC, Muscle Shoals, Alabama, USA
Leon, LA, Fenster WE, and Hammond LL (1986) Agronomic potential of eleven phosphate rocks from Brazil, Colombia, Peru, and Venezuela. Soil Sci Soc Am J 50: 798–802
McClellan, GH (1991) Use of East and Southeast African indigenous agrominerals for fertilizer production. Fert Res 30: 125–126
Mehlich, A (1953) Determination of P, Ca, Mg, K, Na and NH4 by North Carolina soil testing laboratories. Mimeo. N.C. Dep of Agric, Raleigh, NC, USA.
Menon, RG, Chien SH, and Hammond LL (1989a) Comparison of Bray I and Pi tests for evaluating plant-available phosphorus from soils treated with different partially acidulated phosphate rocks. Plant and Soil 114: 211–216
Menon, RG, Chien SH, and Hammond LL (1989b) The Pi soil phosphorus test: A new approach to testing for soil phosphorus. Reference Manual R-7. International Fertilizer Development Center. Muscle Shoals, Alabama, USA.
Menon, RG, and Chien SH (1990) Phosphorus availability to maize from partially acidulated phosphate rocks and phosphate rocks compacted with triple superphosphate. Plant Soil 127: 123–128
Menon, RG, Chien SH and Hammond LL (1990) Development and evaluation of the Pi soil test for plant-available phosphorus. Commun in Soil Sci Plant Anal 21: 1131–1150
Menon, RG, Chien SH and Abd el Nabi Gadalla (1991) Phosphate rocks compacted with superphosphates vs. partially acidulated rocks for bean and rice. Soil Sci Soc Am J 55: 1480–1484
Murphy, J and Riley JP (1962) A modified single solution method for the determination of phosphate in natural waters. Anal Chemic Acta 27: 31–36
Schultz, JJ (1986) Sulfuric acid-based partially acidulated phosphate rock: Its production, cost, and use. Tech. Bull. IFDC-T-31, International Fertilizer Development Center (IFDC), Muscle Shoals, Alabama, USA
Van Kauwenbergh, SJ and McClellan GH (1990) Mineralogy of sedimentary apatites and the relationship to phosphate rock reactivity. Paper presented at the National Workshop on Fertilizer Efficiency held in Cisarua, Indonesia, November 12–13, 1990
Van Kauwenbergh SJ (1991) Overview of phosphate deposits in East and Southeast Africa. Fert Res 30: 127–150
Verma DP, Chien SH, Christianson, CB and Pardhasardhi G (1993) Comparison of efficiency of Mussoorie partially acidulated phosphate rock and single superphosphate in a shallow Alfisol of the Indian semiarid tropics. Fert Res 36: 29–33
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Butegwa, C.N., Mullins, G.L. & Chien, S.H. Agronomic evaluation of fertilizer products derived from Sukulu Hills phosphate rock. Fertilizer Research 44, 113–122 (1995). https://doi.org/10.1007/BF00750800
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DOI: https://doi.org/10.1007/BF00750800