Critical value of soil Olsen-P for potato production systems in volcanic soils of Chile

Abstract: The critical value of soil Olsen-P (mg Olsen-P kg-1) is the value of soil Olsen-P above which the probability of crop response to P fertilization is small or null. The aim of the present study was to determine the critical value of soil Olsen-P for potato tuber yield in volcanic soils. The...

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Autores principales:	Sandaña,Patricio, Orena,Sandra, Rojas,José Santos, Kalazich,Julio, Uribe,Marco
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2018
Materias:	Tuber yield Phosphorus deficiency P-Olsen P supply P rate
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000400965
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spelling	oai:scielo:S0718-951620180004009652019-02-05Critical value of soil Olsen-P for potato production systems in volcanic soils of ChileSandaña,PatricioOrena,SandraRojas,José SantosKalazich,JulioUribe,Marco Tuber yield Phosphorus deficiency P-Olsen P supply P rate Abstract: The critical value of soil Olsen-P (mg Olsen-P kg-1) is the value of soil Olsen-P above which the probability of crop response to P fertilization is small or null. The aim of the present study was to determine the critical value of soil Olsen-P for potato tuber yield in volcanic soils. The data used in this study were taken from 41 experiments of P fertilization conducted in southern Chile from 1977 to 2015 by the National Potato Center at the Instituto de Investigaciones Agropecuarias (INIA). To identify the critical values of soil Olsen-P, relationships between relative yields and initial soil P-Olsen were assessed using three models (linear-plateau, boundary and Mitscherlich function). Across experiments, the average fresh tuber yield was 41.9 Mg ha-1 and varied between 4 and 89 Mg ha-1. Fresh tuber yield decreased up to 92% by P deficiency; however, yield reduction was concentrated between 20 and 40%. The critical Olsen P values determined were 41, 33 and 11 mg Olsen-P kg-1 obtained (P < 0.01) with linear-plateau, boundary function and Mitscherlich function, respectively. However, linear-plateau and Mitscherlich functions showed lower coefficient of determinations (R2 = 0.23 - 0.31) than the boundary function (R2 = 0.97). Therefore, we suggest that the critical Olsen-P value of 33 mg P kg-1 determined with the boundary function is more appropriate for potato growers than the critical value determined with the other models. This information will be valuable for optimizing strategies for P fertilizer management in potato production systems aimed at achieving optimal crop yield and minimizing potential environmental risk.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.18 n.4 20182018-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000400965en10.4067/S0718-95162018005002801
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Tuber yield Phosphorus deficiency P-Olsen P supply P rate
spellingShingle	Tuber yield Phosphorus deficiency P-Olsen P supply P rate Sandaña,Patricio Orena,Sandra Rojas,José Santos Kalazich,Julio Uribe,Marco Critical value of soil Olsen-P for potato production systems in volcanic soils of Chile
description	Abstract: The critical value of soil Olsen-P (mg Olsen-P kg-1) is the value of soil Olsen-P above which the probability of crop response to P fertilization is small or null. The aim of the present study was to determine the critical value of soil Olsen-P for potato tuber yield in volcanic soils. The data used in this study were taken from 41 experiments of P fertilization conducted in southern Chile from 1977 to 2015 by the National Potato Center at the Instituto de Investigaciones Agropecuarias (INIA). To identify the critical values of soil Olsen-P, relationships between relative yields and initial soil P-Olsen were assessed using three models (linear-plateau, boundary and Mitscherlich function). Across experiments, the average fresh tuber yield was 41.9 Mg ha-1 and varied between 4 and 89 Mg ha-1. Fresh tuber yield decreased up to 92% by P deficiency; however, yield reduction was concentrated between 20 and 40%. The critical Olsen P values determined were 41, 33 and 11 mg Olsen-P kg-1 obtained (P < 0.01) with linear-plateau, boundary function and Mitscherlich function, respectively. However, linear-plateau and Mitscherlich functions showed lower coefficient of determinations (R2 = 0.23 - 0.31) than the boundary function (R2 = 0.97). Therefore, we suggest that the critical Olsen-P value of 33 mg P kg-1 determined with the boundary function is more appropriate for potato growers than the critical value determined with the other models. This information will be valuable for optimizing strategies for P fertilizer management in potato production systems aimed at achieving optimal crop yield and minimizing potential environmental risk.
author	Sandaña,Patricio Orena,Sandra Rojas,José Santos Kalazich,Julio Uribe,Marco
author_facet	Sandaña,Patricio Orena,Sandra Rojas,José Santos Kalazich,Julio Uribe,Marco
author_sort	Sandaña,Patricio
title	Critical value of soil Olsen-P for potato production systems in volcanic soils of Chile
title_short	Critical value of soil Olsen-P for potato production systems in volcanic soils of Chile
title_full	Critical value of soil Olsen-P for potato production systems in volcanic soils of Chile
title_fullStr	Critical value of soil Olsen-P for potato production systems in volcanic soils of Chile
title_full_unstemmed	Critical value of soil Olsen-P for potato production systems in volcanic soils of Chile
title_sort	critical value of soil olsen-p for potato production systems in volcanic soils of chile
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000400965
work_keys_str_mv	AT sandanapatricio criticalvalueofsoilolsenpforpotatoproductionsystemsinvolcanicsoilsofchile AT orenasandra criticalvalueofsoilolsenpforpotatoproductionsystemsinvolcanicsoilsofchile AT rojasjosesantos criticalvalueofsoilolsenpforpotatoproductionsystemsinvolcanicsoilsofchile AT kalazichjulio criticalvalueofsoilolsenpforpotatoproductionsystemsinvolcanicsoilsofchile AT uribemarco criticalvalueofsoilolsenpforpotatoproductionsystemsinvolcanicsoilsofchile
_version_	1714206588220211200

Critical value of soil Olsen-P for potato production systems in volcanic soils of Chile

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