Subsoil ‑ potassium depletion accounts for the nutrient budget in high ‑ potassium agricultural soils

Subsoil ‑ potassium depletion accounts for the nutrient budget in high ‑ potassium agricultural soils

Continuous potassium (K) removal without replenishment is progressively mining Argentinean soils. Our goals were to evaluate the sensitivity of soil‑K to K budgets, quantify soil‑K changes over time along the soil profile, and identify soil variables that regulate soil‑K depletion. Four on‑farm trials under two crop rotations including maize, wheat and soybean were evaluated. Three treatments were compared: (1) control (no fertilizer applied); (2) application of nitrogen, phosphorus, and sulfur fertilizers ‑NPS‑; and (3) pristine condition. After nine years, crops removed from 258 to 556 kg K ha−1. Only two sites showed a decline in the exchangeable‑K levels at 0–20 cm but unrelated to K budget. Topsoil exchangeable‑K levels under agriculture resulted 48% lower than their pristine conditions, although still above response levels. Both soil exchangeable‑K and slowly‑exchangeable K vertical distribution patterns (0–100 cm) displayed substantial depletion relative to pristine conditions, mainly concentrated at subsoil (20–100 cm), with 55–83% for exchangeable‑K, and 74–95% for slowly‑ exchangeable‑K. Higher pristine levels of exchangeable‑K and slowly‑exchangeable‑K and lower clay and silt contents resulted in higher soil‑K depletion. Soil K management guidelines should consider both topsoil and subsoil nutrient status and variables related to soil K buffer capacity.

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Main Authors: Correndo, Adrián Alejandro, Rubio, Gerardo, García, Fernando Oscar, Ciampitti, Ignacio Antonio
Format: Texto biblioteca
Language:eng
Subjects:POTASSIUM, SUBSOIL, NUTRIENT BUDGET, ,
Online Access:http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=55719
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spelling KOHA-OAI-AGRO:557192024-02-23T13:38:30Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=55719http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=AAGSubsoil ‑ potassium depletion accounts for the nutrient budget in high ‑ potassium agricultural soilsCorrendo, Adrián AlejandroRubio, GerardoGarcía, Fernando OscarCiampitti, Ignacio Antoniotextengapplication/pdfContinuous potassium (K) removal without replenishment is progressively mining Argentinean soils. Our goals were to evaluate the sensitivity of soil‑K to K budgets, quantify soil‑K changes over time along the soil profile, and identify soil variables that regulate soil‑K depletion. Four on‑farm trials under two crop rotations including maize, wheat and soybean were evaluated. Three treatments were compared: (1) control (no fertilizer applied); (2) application of nitrogen, phosphorus, and sulfur fertilizers ‑NPS‑; and (3) pristine condition. After nine years, crops removed from 258 to 556 kg K ha−1. Only two sites showed a decline in the exchangeable‑K levels at 0–20 cm but unrelated to K budget. Topsoil exchangeable‑K levels under agriculture resulted 48% lower than their pristine conditions, although still above response levels. Both soil exchangeable‑K and slowly‑exchangeable K vertical distribution patterns (0–100 cm) displayed substantial depletion relative to pristine conditions, mainly concentrated at subsoil (20–100 cm), with 55–83% for exchangeable‑K, and 74–95% for slowly‑ exchangeable‑K. Higher pristine levels of exchangeable‑K and slowly‑exchangeable‑K and lower clay and silt contents resulted in higher soil‑K depletion. Soil K management guidelines should consider both topsoil and subsoil nutrient status and variables related to soil K buffer capacity.Continuous potassium (K) removal without replenishment is progressively mining Argentinean soils. Our goals were to evaluate the sensitivity of soil‑K to K budgets, quantify soil‑K changes over time along the soil profile, and identify soil variables that regulate soil‑K depletion. Four on‑farm trials under two crop rotations including maize, wheat and soybean were evaluated. Three treatments were compared: (1) control (no fertilizer applied); (2) application of nitrogen, phosphorus, and sulfur fertilizers ‑NPS‑; and (3) pristine condition. After nine years, crops removed from 258 to 556 kg K ha−1. Only two sites showed a decline in the exchangeable‑K levels at 0–20 cm but unrelated to K budget. Topsoil exchangeable‑K levels under agriculture resulted 48% lower than their pristine conditions, although still above response levels. Both soil exchangeable‑K and slowly‑exchangeable K vertical distribution patterns (0–100 cm) displayed substantial depletion relative to pristine conditions, mainly concentrated at subsoil (20–100 cm), with 55–83% for exchangeable‑K, and 74–95% for slowly‑ exchangeable‑K. Higher pristine levels of exchangeable‑K and slowly‑exchangeable‑K and lower clay and silt contents resulted in higher soil‑K depletion. Soil K management guidelines should consider both topsoil and subsoil nutrient status and variables related to soil K buffer capacity.POTASSIUMSUBSOILNUTRIENT BUDGETPOTASSIUMScientific Reports
institution UBA FA
collection Koha
country Argentina
countrycode AR
component Bibliográfico
access En linea
En linea
databasecode cat-ceiba
tag biblioteca
region America del Sur
libraryname Biblioteca Central FAUBA
language eng
topic POTASSIUM
SUBSOIL
NUTRIENT BUDGET
POTASSIUM

POTASSIUM
SUBSOIL
NUTRIENT BUDGET
POTASSIUM
spellingShingle POTASSIUM
SUBSOIL
NUTRIENT BUDGET
POTASSIUM

POTASSIUM
SUBSOIL
NUTRIENT BUDGET
POTASSIUM
Correndo, Adrián Alejandro
Rubio, Gerardo
García, Fernando Oscar
Ciampitti, Ignacio Antonio
Subsoil ‑ potassium depletion accounts for the nutrient budget in high ‑ potassium agricultural soils
description Continuous potassium (K) removal without replenishment is progressively mining Argentinean soils. Our goals were to evaluate the sensitivity of soil‑K to K budgets, quantify soil‑K changes over time along the soil profile, and identify soil variables that regulate soil‑K depletion. Four on‑farm trials under two crop rotations including maize, wheat and soybean were evaluated. Three treatments were compared: (1) control (no fertilizer applied); (2) application of nitrogen, phosphorus, and sulfur fertilizers ‑NPS‑; and (3) pristine condition. After nine years, crops removed from 258 to 556 kg K ha−1. Only two sites showed a decline in the exchangeable‑K levels at 0–20 cm but unrelated to K budget. Topsoil exchangeable‑K levels under agriculture resulted 48% lower than their pristine conditions, although still above response levels. Both soil exchangeable‑K and slowly‑exchangeable K vertical distribution patterns (0–100 cm) displayed substantial depletion relative to pristine conditions, mainly concentrated at subsoil (20–100 cm), with 55–83% for exchangeable‑K, and 74–95% for slowly‑ exchangeable‑K. Higher pristine levels of exchangeable‑K and slowly‑exchangeable‑K and lower clay and silt contents resulted in higher soil‑K depletion. Soil K management guidelines should consider both topsoil and subsoil nutrient status and variables related to soil K buffer capacity.
format Texto
topic_facet
POTASSIUM
SUBSOIL
NUTRIENT BUDGET
POTASSIUM
author Correndo, Adrián Alejandro
Rubio, Gerardo
García, Fernando Oscar
Ciampitti, Ignacio Antonio
author_facet Correndo, Adrián Alejandro
Rubio, Gerardo
García, Fernando Oscar
Ciampitti, Ignacio Antonio
author_sort Correndo, Adrián Alejandro
title Subsoil ‑ potassium depletion accounts for the nutrient budget in high ‑ potassium agricultural soils
title_short Subsoil ‑ potassium depletion accounts for the nutrient budget in high ‑ potassium agricultural soils
title_full Subsoil ‑ potassium depletion accounts for the nutrient budget in high ‑ potassium agricultural soils
title_fullStr Subsoil ‑ potassium depletion accounts for the nutrient budget in high ‑ potassium agricultural soils
title_full_unstemmed Subsoil ‑ potassium depletion accounts for the nutrient budget in high ‑ potassium agricultural soils
title_sort subsoil ‑ potassium depletion accounts for the nutrient budget in high ‑ potassium agricultural soils
url http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=55719
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
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AT garciafernandooscar subsoilpotassiumdepletionaccountsforthenutrientbudgetinhighpotassiumagriculturalsoils
AT ciampittiignacioantonio subsoilpotassiumdepletionaccountsforthenutrientbudgetinhighpotassiumagriculturalsoils
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