Quantifying Nitrate Leaching in Irrigated Wheat with Different Nitrogen Fertilization Strategies in an Alfisol

Consumption of water contaminated with nitrates is associated with important health effects such as methemoglobinemia and gastric cancer. Intensive agriculture, which uses large quantities of N fertilizer, is the main source of nitrates in water systems. There are several strategies to reduce leachi...

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Autores principales:	Claret M,Marcelino, Urrutia P,Roberto, Ortega B,Rodrigo, Best S,Stanley, Valderrama V,Natalia
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2011
Materias:	nitrates precision agriculture chlorophyll meter wheat
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100018
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spelling	oai:scielo:S0718-583920110001000182018-10-01Quantifying Nitrate Leaching in Irrigated Wheat with Different Nitrogen Fertilization Strategies in an AlfisolClaret M,MarcelinoUrrutia P,RobertoOrtega B,RodrigoBest S,StanleyValderrama V,Natalia nitrates precision agriculture chlorophyll meter wheat Consumption of water contaminated with nitrates is associated with important health effects such as methemoglobinemia and gastric cancer. Intensive agriculture, which uses large quantities of N fertilizer, is the main source of nitrates in water systems. There are several strategies to reduce leaching and increase Nitrogen Use Efficiency (NUE). An experiment was conducted with spring wheat (Triticum aestivum L.) under sprinkler irrigation (center pivot) to determine if adjusted N applications using precision agriculture tools and plant demand resulted in a lower groundwater nitrate load. Evaluated treatments were: produced fertilization (Pr), precision agriculture (Pa), chlorophyll meter (Sm), and control without N (W/N). The ceramic capsule methodology was used to evaluate N leaching losses that were sampled after each irrigation (six) and drainage water was also estimated. Differences among treatments in terms of N loss and grain yield were not significant (p > 0.05). However, N balance showed significant differences (p < 0.01) in soil residual N among treatments. A regression between applied and residual soil N after harvest showed that N, applied as fertilizer, explained 98% of residual soil N variation, which would probably be leached in the following winter since the soil would be bare. It was concluded that NUE can be improved to result in a lower environmental load by using precision agriculture tools and considering plant N demandinfo:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.71 n.1 20112011-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100018en10.4067/S0718-58392011000100018
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	nitrates precision agriculture chlorophyll meter wheat
spellingShingle	nitrates precision agriculture chlorophyll meter wheat Claret M,Marcelino Urrutia P,Roberto Ortega B,Rodrigo Best S,Stanley Valderrama V,Natalia Quantifying Nitrate Leaching in Irrigated Wheat with Different Nitrogen Fertilization Strategies in an Alfisol
description	Consumption of water contaminated with nitrates is associated with important health effects such as methemoglobinemia and gastric cancer. Intensive agriculture, which uses large quantities of N fertilizer, is the main source of nitrates in water systems. There are several strategies to reduce leaching and increase Nitrogen Use Efficiency (NUE). An experiment was conducted with spring wheat (Triticum aestivum L.) under sprinkler irrigation (center pivot) to determine if adjusted N applications using precision agriculture tools and plant demand resulted in a lower groundwater nitrate load. Evaluated treatments were: produced fertilization (Pr), precision agriculture (Pa), chlorophyll meter (Sm), and control without N (W/N). The ceramic capsule methodology was used to evaluate N leaching losses that were sampled after each irrigation (six) and drainage water was also estimated. Differences among treatments in terms of N loss and grain yield were not significant (p > 0.05). However, N balance showed significant differences (p < 0.01) in soil residual N among treatments. A regression between applied and residual soil N after harvest showed that N, applied as fertilizer, explained 98% of residual soil N variation, which would probably be leached in the following winter since the soil would be bare. It was concluded that NUE can be improved to result in a lower environmental load by using precision agriculture tools and considering plant N demand
author	Claret M,Marcelino Urrutia P,Roberto Ortega B,Rodrigo Best S,Stanley Valderrama V,Natalia
author_facet	Claret M,Marcelino Urrutia P,Roberto Ortega B,Rodrigo Best S,Stanley Valderrama V,Natalia
author_sort	Claret M,Marcelino
title	Quantifying Nitrate Leaching in Irrigated Wheat with Different Nitrogen Fertilization Strategies in an Alfisol
title_short	Quantifying Nitrate Leaching in Irrigated Wheat with Different Nitrogen Fertilization Strategies in an Alfisol
title_full	Quantifying Nitrate Leaching in Irrigated Wheat with Different Nitrogen Fertilization Strategies in an Alfisol
title_fullStr	Quantifying Nitrate Leaching in Irrigated Wheat with Different Nitrogen Fertilization Strategies in an Alfisol
title_full_unstemmed	Quantifying Nitrate Leaching in Irrigated Wheat with Different Nitrogen Fertilization Strategies in an Alfisol
title_sort	quantifying nitrate leaching in irrigated wheat with different nitrogen fertilization strategies in an alfisol
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100018
work_keys_str_mv	AT claretmmarcelino quantifyingnitrateleachinginirrigatedwheatwithdifferentnitrogenfertilizationstrategiesinanalfisol AT urrutiaproberto quantifyingnitrateleachinginirrigatedwheatwithdifferentnitrogenfertilizationstrategiesinanalfisol AT ortegabrodrigo quantifyingnitrateleachinginirrigatedwheatwithdifferentnitrogenfertilizationstrategiesinanalfisol AT bestsstanley quantifyingnitrateleachinginirrigatedwheatwithdifferentnitrogenfertilizationstrategiesinanalfisol AT valderramavnatalia quantifyingnitrateleachinginirrigatedwheatwithdifferentnitrogenfertilizationstrategiesinanalfisol
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Quantifying Nitrate Leaching in Irrigated Wheat with Different Nitrogen Fertilization Strategies in an Alfisol

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