Green Index to Estimate Crop Nitrogen Status in Potato Processing Varieties

Nitrogen is the most important nutrient in growing potatoes (Solanum tuberosum L.) because either a deficit or excess in its supply can affect yield and quality, resulting in economic losses. To make a rational use of this nutrient, it is necessary to monitor N status during crop development. The gr...

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Autores principales:	Giletto,Claudia Marcela, Díaz,Cecilia, Rattín,Jorge Edgardo, Echeverría,Hernán Eduardo, Caldiz,Daniel Osmar
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2010
Materias:	nitrogen chlorophyll meter potato varieties
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100015
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spelling	oai:scielo:S0718-583920100001000152018-10-01Green Index to Estimate Crop Nitrogen Status in Potato Processing VarietiesGiletto,Claudia MarcelaDíaz,CeciliaRattín,Jorge EdgardoEcheverría,Hernán EduardoCaldiz,Daniel Osmar nitrogen chlorophyll meter potato varieties Nitrogen is the most important nutrient in growing potatoes (Solanum tuberosum L.) because either a deficit or excess in its supply can affect yield and quality, resulting in economic losses. To make a rational use of this nutrient, it is necessary to monitor N status during crop development. The green index (IV) could be a valuable method to assess N sufficiency. In experiments with variable N supply, the IV was assessed during crop growth and an N sufficiency index was derived (ISN-IV). The relationship between tuber yield and the IV and ISN-IV was established, as well as the association between the IV and ISN-IV and N concentration in the following varieties: Innovator, Bannock Russet and Gem Russet. During the vegetative growth stage, the IV and ISN-IV were respectively above 40 SPAD units and 93%; while N concentration in the plant was above 4% in the three varieties, which suggests the N supply was sufficient. During the tuber-bulking stage, the necessary IV and ISN-IV thresholds to reach maximum yields were 40.6 and 35 SPAD units and 93.7 and 91% at 89 and 103 days after planting, respectively. We concluded that the chlorophyll meter is an appropriate tool to determine the nutritional status in potato crops. The IV and ISN-IV values showed that the crop achieved maximum yields when N levels are above the threshold values found in this research.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.70 n.1 20102010-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100015en10.4067/S0718-58392010000100015
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	nitrogen chlorophyll meter potato varieties
spellingShingle	nitrogen chlorophyll meter potato varieties Giletto,Claudia Marcela Díaz,Cecilia Rattín,Jorge Edgardo Echeverría,Hernán Eduardo Caldiz,Daniel Osmar Green Index to Estimate Crop Nitrogen Status in Potato Processing Varieties
description	Nitrogen is the most important nutrient in growing potatoes (Solanum tuberosum L.) because either a deficit or excess in its supply can affect yield and quality, resulting in economic losses. To make a rational use of this nutrient, it is necessary to monitor N status during crop development. The green index (IV) could be a valuable method to assess N sufficiency. In experiments with variable N supply, the IV was assessed during crop growth and an N sufficiency index was derived (ISN-IV). The relationship between tuber yield and the IV and ISN-IV was established, as well as the association between the IV and ISN-IV and N concentration in the following varieties: Innovator, Bannock Russet and Gem Russet. During the vegetative growth stage, the IV and ISN-IV were respectively above 40 SPAD units and 93%; while N concentration in the plant was above 4% in the three varieties, which suggests the N supply was sufficient. During the tuber-bulking stage, the necessary IV and ISN-IV thresholds to reach maximum yields were 40.6 and 35 SPAD units and 93.7 and 91% at 89 and 103 days after planting, respectively. We concluded that the chlorophyll meter is an appropriate tool to determine the nutritional status in potato crops. The IV and ISN-IV values showed that the crop achieved maximum yields when N levels are above the threshold values found in this research.
author	Giletto,Claudia Marcela Díaz,Cecilia Rattín,Jorge Edgardo Echeverría,Hernán Eduardo Caldiz,Daniel Osmar
author_facet	Giletto,Claudia Marcela Díaz,Cecilia Rattín,Jorge Edgardo Echeverría,Hernán Eduardo Caldiz,Daniel Osmar
author_sort	Giletto,Claudia Marcela
title	Green Index to Estimate Crop Nitrogen Status in Potato Processing Varieties
title_short	Green Index to Estimate Crop Nitrogen Status in Potato Processing Varieties
title_full	Green Index to Estimate Crop Nitrogen Status in Potato Processing Varieties
title_fullStr	Green Index to Estimate Crop Nitrogen Status in Potato Processing Varieties
title_full_unstemmed	Green Index to Estimate Crop Nitrogen Status in Potato Processing Varieties
title_sort	green index to estimate crop nitrogen status in potato processing varieties
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100015
work_keys_str_mv	AT gilettoclaudiamarcela greenindextoestimatecropnitrogenstatusinpotatoprocessingvarieties AT diazcecilia greenindextoestimatecropnitrogenstatusinpotatoprocessingvarieties AT rattinjorgeedgardo greenindextoestimatecropnitrogenstatusinpotatoprocessingvarieties AT echeverriahernaneduardo greenindextoestimatecropnitrogenstatusinpotatoprocessingvarieties AT caldizdanielosmar greenindextoestimatecropnitrogenstatusinpotatoprocessingvarieties
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Green Index to Estimate Crop Nitrogen Status in Potato Processing Varieties

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