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Mechanisms Responsible for Soil Phosphorus Availability Differences between Sprinkler and Furrow Irrigation.
J Environ Qual 2019; 48(5):1370-1379JE

Abstract

From a historical perspective, human-induced soil erosion and resulting soil phosphorus (P) losses have likely occurred for thousands of years. In modern times, erosion risk and off-site P transport can be decreased if producers convert from furrow to sprinkler irrigation, but conversion may alter nutrient dynamics. Our study goal was to determine soil P dynamics in furrow- (in place since the early 1900s) versus sprinkler-irrigated (installed within the last decade) soils from four paired producer fields in Idaho. Furrow- and sprinkler-irrigated soils (0-5 cm; Aridisols) contained on average 38 and 20 mg kg of Olsen-extractable P (i.e., plant-available P), respectively; extractable P values over 40 mg kg limit Idaho producers to P application based on crop uptake only. Soil samples were also analyzed using a modified Hedley extraction. Furrow-irrigated soils contained greater inorganic P concentrations in the soluble+aluminum (Al)-bound+iron (Fe)-bound, occluded, and amorphous Fe-bound pools. Phosphorus -edge X-ray absorption near-edge structure (XANES) spectroscopy was unable to detect Fe-associated P but indicated greater amounts of apatite-like or octacalcium phosphate-like P in furrow-irrigated producer soils, while sprinkler-irrigated fields had lower amounts of apatite-like P and greater proportions of P bound to calcite. Findings from a controlled USDA-ARS sprinkler- versus furrow-irrigation study suggested that changes in P dynamics occur slowly over time, as few differences were observed. Overall findings suggest that Fe redox chemistry or changes in calcium (Ca)-associated P in flooded conditions altered P availability under furrow irrigation, even in aridic, calcareous soils, contributing to greater Olsen-extractable P concentrations in long-term furrow-irrigated fields.

Authors

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Pub Type(s)

Journal Article

Language

eng

PubMed ID

31589736

Citation

Ippolito, James A., et al. "Mechanisms Responsible for Soil Phosphorus Availability Differences Between Sprinkler and Furrow Irrigation." Journal of Environmental Quality, vol. 48, no. 5, 2019, pp. 1370-1379.
Ippolito JA, Bjorneberg DL, Blecker SW, et al. Mechanisms Responsible for Soil Phosphorus Availability Differences between Sprinkler and Furrow Irrigation. J Environ Qual. 2019;48(5):1370-1379.
Ippolito, J. A., Bjorneberg, D. L., Blecker, S. W., & Massey, M. S. (2019). Mechanisms Responsible for Soil Phosphorus Availability Differences between Sprinkler and Furrow Irrigation. Journal of Environmental Quality, 48(5), pp. 1370-1379. doi:10.2134/jeq2019.01.0016.
Ippolito JA, et al. Mechanisms Responsible for Soil Phosphorus Availability Differences Between Sprinkler and Furrow Irrigation. J Environ Qual. 2019;48(5):1370-1379. PubMed PMID: 31589736.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mechanisms Responsible for Soil Phosphorus Availability Differences between Sprinkler and Furrow Irrigation. AU - Ippolito,James A, AU - Bjorneberg,Dave L, AU - Blecker,Steve W, AU - Massey,Michael S, PY - 2019/10/8/entrez PY - 2019/10/8/pubmed PY - 2019/10/12/medline SP - 1370 EP - 1379 JF - Journal of environmental quality JO - J. Environ. Qual. VL - 48 IS - 5 N2 - From a historical perspective, human-induced soil erosion and resulting soil phosphorus (P) losses have likely occurred for thousands of years. In modern times, erosion risk and off-site P transport can be decreased if producers convert from furrow to sprinkler irrigation, but conversion may alter nutrient dynamics. Our study goal was to determine soil P dynamics in furrow- (in place since the early 1900s) versus sprinkler-irrigated (installed within the last decade) soils from four paired producer fields in Idaho. Furrow- and sprinkler-irrigated soils (0-5 cm; Aridisols) contained on average 38 and 20 mg kg of Olsen-extractable P (i.e., plant-available P), respectively; extractable P values over 40 mg kg limit Idaho producers to P application based on crop uptake only. Soil samples were also analyzed using a modified Hedley extraction. Furrow-irrigated soils contained greater inorganic P concentrations in the soluble+aluminum (Al)-bound+iron (Fe)-bound, occluded, and amorphous Fe-bound pools. Phosphorus -edge X-ray absorption near-edge structure (XANES) spectroscopy was unable to detect Fe-associated P but indicated greater amounts of apatite-like or octacalcium phosphate-like P in furrow-irrigated producer soils, while sprinkler-irrigated fields had lower amounts of apatite-like P and greater proportions of P bound to calcite. Findings from a controlled USDA-ARS sprinkler- versus furrow-irrigation study suggested that changes in P dynamics occur slowly over time, as few differences were observed. Overall findings suggest that Fe redox chemistry or changes in calcium (Ca)-associated P in flooded conditions altered P availability under furrow irrigation, even in aridic, calcareous soils, contributing to greater Olsen-extractable P concentrations in long-term furrow-irrigated fields. SN - 1537-2537 UR - https://www.unboundmedicine.com/medline/citation/31589736/Mechanisms_Responsible_for_Soil_Phosphorus_Availability_Differences_between_Sprinkler_and_Furrow_Irrigation L2 - http://dl.sciencesocieties.org/publications/jeq/articles/48/5/1370 DB - PRIME DP - Unbound Medicine ER -