Comparing nitrate leaching in lettuce crops cultivated under agroecological, transition, and conventional agricultural management in central Chile

ABSTRACT Nitrogen overfertilization is a common horticultural practice in central Chile, leading to the risk of nitrate leaching and contamination of aquifers and groundwater. The aim of the present study was to evaluate the effect of organic amendments on NO - leaching. Three sites with different m...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	González-Miranda,Isabel, Vidal,Kooichi, Peñaloza,Patricia
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2021
Materias:	Inorganic fertilizers Lactuca sativa nitrogen organic amendments pore water rhizons soil management
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000200210
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-58392021000200210
record_format	dspace
spelling	oai:scielo:S0718-583920210002002102021-05-28Comparing nitrate leaching in lettuce crops cultivated under agroecological, transition, and conventional agricultural management in central ChileGonzález-Miranda,IsabelVidal,KooichiPeñaloza,Patricia Inorganic fertilizers Lactuca sativa nitrogen organic amendments pore water rhizons soil management ABSTRACT Nitrogen overfertilization is a common horticultural practice in central Chile, leading to the risk of nitrate leaching and contamination of aquifers and groundwater. The aim of the present study was to evaluate the effect of organic amendments on NO - leaching. Three sites with different management systems were selected: Agroecological (AE, 3-yr agroecological management), Transition (TR, starting agroecological management), and Conventional (CN, traditional conventional management). Two lettuce (Lactuca sativa L.) growing cycles (autumn-winter and spring-summer) were implemented at each site. Nutrition at AE and TR was based on organic fertilizers and microorganisms, and inorganic N fertilizers were used at CN. The pore water was sampled at the beginning and at the end of each cycle at the 70 cm depth. Lettuce yields and unit weight were measured. There was a significant effect of the site and time of sampling (both p = 0.000) on the NO - concentration in leached water. At the beginning of the first cycle, nitrate leaching was 2.2 times higher at TR and CN (370 ± 81 mg L-1) compared with AE (163 ± 54 mg L-1), reflecting the loss of previously accumulated soil N. Afterward, leaching at CN remained higher than at AE and CN, significantly varying between sampling times; however, it decreased by 37% to 80% compared with the initial measurement. Leaching at both AE and TR remained stable within a low range of 38 to 96 mg L-1. Results showed that organic soil management is able to maintain a low rate of nitrate leaching in the soil compared with conventional management.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.81 n.2 20212021-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000200210en10.4067/S0718-58392021000200210
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Inorganic fertilizers Lactuca sativa nitrogen organic amendments pore water rhizons soil management
spellingShingle	Inorganic fertilizers Lactuca sativa nitrogen organic amendments pore water rhizons soil management González-Miranda,Isabel Vidal,Kooichi Peñaloza,Patricia Comparing nitrate leaching in lettuce crops cultivated under agroecological, transition, and conventional agricultural management in central Chile
description	ABSTRACT Nitrogen overfertilization is a common horticultural practice in central Chile, leading to the risk of nitrate leaching and contamination of aquifers and groundwater. The aim of the present study was to evaluate the effect of organic amendments on NO - leaching. Three sites with different management systems were selected: Agroecological (AE, 3-yr agroecological management), Transition (TR, starting agroecological management), and Conventional (CN, traditional conventional management). Two lettuce (Lactuca sativa L.) growing cycles (autumn-winter and spring-summer) were implemented at each site. Nutrition at AE and TR was based on organic fertilizers and microorganisms, and inorganic N fertilizers were used at CN. The pore water was sampled at the beginning and at the end of each cycle at the 70 cm depth. Lettuce yields and unit weight were measured. There was a significant effect of the site and time of sampling (both p = 0.000) on the NO - concentration in leached water. At the beginning of the first cycle, nitrate leaching was 2.2 times higher at TR and CN (370 ± 81 mg L-1) compared with AE (163 ± 54 mg L-1), reflecting the loss of previously accumulated soil N. Afterward, leaching at CN remained higher than at AE and CN, significantly varying between sampling times; however, it decreased by 37% to 80% compared with the initial measurement. Leaching at both AE and TR remained stable within a low range of 38 to 96 mg L-1. Results showed that organic soil management is able to maintain a low rate of nitrate leaching in the soil compared with conventional management.
author	González-Miranda,Isabel Vidal,Kooichi Peñaloza,Patricia
author_facet	González-Miranda,Isabel Vidal,Kooichi Peñaloza,Patricia
author_sort	González-Miranda,Isabel
title	Comparing nitrate leaching in lettuce crops cultivated under agroecological, transition, and conventional agricultural management in central Chile
title_short	Comparing nitrate leaching in lettuce crops cultivated under agroecological, transition, and conventional agricultural management in central Chile
title_full	Comparing nitrate leaching in lettuce crops cultivated under agroecological, transition, and conventional agricultural management in central Chile
title_fullStr	Comparing nitrate leaching in lettuce crops cultivated under agroecological, transition, and conventional agricultural management in central Chile
title_full_unstemmed	Comparing nitrate leaching in lettuce crops cultivated under agroecological, transition, and conventional agricultural management in central Chile
title_sort	comparing nitrate leaching in lettuce crops cultivated under agroecological, transition, and conventional agricultural management in central chile
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000200210
work_keys_str_mv	AT gonzalezmirandaisabel comparingnitrateleachinginlettucecropscultivatedunderagroecologicaltransitionandconventionalagriculturalmanagementincentralchile AT vidalkooichi comparingnitrateleachinginlettucecropscultivatedunderagroecologicaltransitionandconventionalagriculturalmanagementincentralchile AT penalozapatricia comparingnitrateleachinginlettucecropscultivatedunderagroecologicaltransitionandconventionalagriculturalmanagementincentralchile
_version_	1714205409969963008

Comparing nitrate leaching in lettuce crops cultivated under agroecological, transition, and conventional agricultural management in central Chile

Ejemplares similares