RESPONSE OF HYDROPONIC LETTUCE CULTIVARS TO DIFFERENT TREATMENTS OF NITROGEN: GROWTH AND FOLIAR NITRATE CONTENT

The nitrogen requirements of lettuce (Lactuca sativa L.) cultivars for obtaining plants of a high phenotypical quality and low nitrate foliar content were studied in this research. Butterhead (Divina and Prima cvs.) and loose-leaf (Grand Rapids and Brisa cvs.) lettuces were grown in a modified hydro...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Lastra,Olga, Tapia,María Luisa, Razeto,Bruno, Rojas,Mainor
Lenguaje:	English
Publicado:	Universidad de Tarapacá. Facultad de Ciencias Agronómicas 2009
Materias:	Lactuca sativa hydroponic lettuces cultivars nitrogen requirements
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292009000100010
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-34292009000100010
record_format	dspace
spelling	oai:scielo:S0718-342920090001000102009-07-14RESPONSE OF HYDROPONIC LETTUCE CULTIVARS TO DIFFERENT TREATMENTS OF NITROGEN: GROWTH AND FOLIAR NITRATE CONTENTLastra,OlgaTapia,María LuisaRazeto,BrunoRojas,Mainor Lactuca sativa hydroponic lettuces cultivars nitrogen requirements The nitrogen requirements of lettuce (Lactuca sativa L.) cultivars for obtaining plants of a high phenotypical quality and low nitrate foliar content were studied in this research. Butterhead (Divina and Prima cvs.) and loose-leaf (Grand Rapids and Brisa cvs.) lettuces were grown in a modified hydroponic floating system. Plants were subjected to four treatments differential of nitrogen and are in mg of nitrogen L-1: solution 1: 100 NO3- -N; solution 2:150 NO3--N and 50 NH4+ -N; solution 3: 200 NO3--N and 100 NH4+-N; solution 4: 250 NO3- -N and 150 NH4+ -N meanwhile as base solution was used modified Hoagland II solution. Cultivar responses to treatments were different so much in growth as foliar nitrate content. While the greatest growth was observed in‘Grand Rapids’ and ‘Brisa’ in solution 1 with the lowest nitrogen content in which NO3- -N only was supplied, the opposite was observed in ‘Divina’ and ‘Prima’ in solution 4 and where NO3-and NH4+ were supplied. These results showed that the nutritional requirements cultivars are different. Moreover, greatest plant growth was observed in cultivars where the foliar nitrate content was highest. High levels of nitrate in vegetable crops have been associated with human health problem. The four cultivars in all treatments showed foliar nitrate contents below the limits established by the European Commission Legislation. This study permit to optimize the growth under such conditions.info:eu-repo/semantics/openAccessUniversidad de Tarapacá. Facultad de Ciencias AgronómicasIdesia (Arica) v.27 n.1 20092009-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292009000100010en10.4067/S0718-34292009000100010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Lactuca sativa hydroponic lettuces cultivars nitrogen requirements
spellingShingle	Lactuca sativa hydroponic lettuces cultivars nitrogen requirements Lastra,Olga Tapia,María Luisa Razeto,Bruno Rojas,Mainor RESPONSE OF HYDROPONIC LETTUCE CULTIVARS TO DIFFERENT TREATMENTS OF NITROGEN: GROWTH AND FOLIAR NITRATE CONTENT
description	The nitrogen requirements of lettuce (Lactuca sativa L.) cultivars for obtaining plants of a high phenotypical quality and low nitrate foliar content were studied in this research. Butterhead (Divina and Prima cvs.) and loose-leaf (Grand Rapids and Brisa cvs.) lettuces were grown in a modified hydroponic floating system. Plants were subjected to four treatments differential of nitrogen and are in mg of nitrogen L-1: solution 1: 100 NO3- -N; solution 2:150 NO3--N and 50 NH4+ -N; solution 3: 200 NO3--N and 100 NH4+-N; solution 4: 250 NO3- -N and 150 NH4+ -N meanwhile as base solution was used modified Hoagland II solution. Cultivar responses to treatments were different so much in growth as foliar nitrate content. While the greatest growth was observed in‘Grand Rapids’ and ‘Brisa’ in solution 1 with the lowest nitrogen content in which NO3- -N only was supplied, the opposite was observed in ‘Divina’ and ‘Prima’ in solution 4 and where NO3-and NH4+ were supplied. These results showed that the nutritional requirements cultivars are different. Moreover, greatest plant growth was observed in cultivars where the foliar nitrate content was highest. High levels of nitrate in vegetable crops have been associated with human health problem. The four cultivars in all treatments showed foliar nitrate contents below the limits established by the European Commission Legislation. This study permit to optimize the growth under such conditions.
author	Lastra,Olga Tapia,María Luisa Razeto,Bruno Rojas,Mainor
author_facet	Lastra,Olga Tapia,María Luisa Razeto,Bruno Rojas,Mainor
author_sort	Lastra,Olga
title	RESPONSE OF HYDROPONIC LETTUCE CULTIVARS TO DIFFERENT TREATMENTS OF NITROGEN: GROWTH AND FOLIAR NITRATE CONTENT
title_short	RESPONSE OF HYDROPONIC LETTUCE CULTIVARS TO DIFFERENT TREATMENTS OF NITROGEN: GROWTH AND FOLIAR NITRATE CONTENT
title_full	RESPONSE OF HYDROPONIC LETTUCE CULTIVARS TO DIFFERENT TREATMENTS OF NITROGEN: GROWTH AND FOLIAR NITRATE CONTENT
title_fullStr	RESPONSE OF HYDROPONIC LETTUCE CULTIVARS TO DIFFERENT TREATMENTS OF NITROGEN: GROWTH AND FOLIAR NITRATE CONTENT
title_full_unstemmed	RESPONSE OF HYDROPONIC LETTUCE CULTIVARS TO DIFFERENT TREATMENTS OF NITROGEN: GROWTH AND FOLIAR NITRATE CONTENT
title_sort	response of hydroponic lettuce cultivars to different treatments of nitrogen: growth and foliar nitrate content
publisher	Universidad de Tarapacá. Facultad de Ciencias Agronómicas
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292009000100010
work_keys_str_mv	AT lastraolga responseofhydroponiclettucecultivarstodifferenttreatmentsofnitrogengrowthandfoliarnitratecontent AT tapiamarialuisa responseofhydroponiclettucecultivarstodifferenttreatmentsofnitrogengrowthandfoliarnitratecontent AT razetobruno responseofhydroponiclettucecultivarstodifferenttreatmentsofnitrogengrowthandfoliarnitratecontent AT rojasmainor responseofhydroponiclettucecultivarstodifferenttreatmentsofnitrogengrowthandfoliarnitratecontent
_version_	1714203655420248064

RESPONSE OF HYDROPONIC LETTUCE CULTIVARS TO DIFFERENT TREATMENTS OF NITROGEN: GROWTH AND FOLIAR NITRATE CONTENT

Ejemplares similares