Evaluation of On-Farm Quick Tests on Slurries from Southern Chile Dairy Farms

Currently in Chile, there is a lack of tools to determine the real-time nutrient contribution of slurries. This study aims to evaluate three quick tests for their accuracy in estimating the total contents of N (TN), P (TP), K (TK), and ammonium-N (N-NH4+) in dairy slurries. The quick tests included...

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Autores principales:	Salazar S,Francisco, Rosas U,Marianela
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2012
Materias:	Slurry organic residue chemical analysis nutrients
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000300021
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spelling	oai:scielo:S0718-583920120003000212018-10-01Evaluation of On-Farm Quick Tests on Slurries from Southern Chile Dairy FarmsSalazar S,FranciscoRosas U,Marianela Slurry organic residue chemical analysis nutrients Currently in Chile, there is a lack of tools to determine the real-time nutrient contribution of slurries. This study aims to evaluate three quick tests for their accuracy in estimating the total contents of N (TN), P (TP), K (TK), and ammonium-N (N-NH4+) in dairy slurries. The quick tests included the Agros Nova Meter, Quantofix N Volumeter, and a hydrometer. While the Agros and Quantofix meters directly measure the ammonium-N content; the hydrometer indirectly estimates the total content of N, P, and K based on linear relationships with the slurry DM. Samples (73) were collected from dairy farms along Southern Chile (39° to 44° S and 71 to 73° W). Analyses were carried out on laboratory conditions using conventional techniques as well as using each of the quick tests. Results were subjected to straight-line regression analyses. Agros and Quantofix N-NH4+ measurements were accurate (P < 0.01; r² > 0.80). The hydrometer estimations of TN, TP, and TK were also reliable (P < 0.01). Best results were obtained with P (r² = 0.87) and N (r² = 0.79) total contents. To evaluate the kits on-farm and transfer those to dairy producers may constitute a next step towards an efficient management of organic residues in dairy farms in Chile.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.72 n.3 20122012-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000300021en10.4067/S0718-58392012000300021
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Slurry organic residue chemical analysis nutrients
spellingShingle	Slurry organic residue chemical analysis nutrients Salazar S,Francisco Rosas U,Marianela Evaluation of On-Farm Quick Tests on Slurries from Southern Chile Dairy Farms
description	Currently in Chile, there is a lack of tools to determine the real-time nutrient contribution of slurries. This study aims to evaluate three quick tests for their accuracy in estimating the total contents of N (TN), P (TP), K (TK), and ammonium-N (N-NH4+) in dairy slurries. The quick tests included the Agros Nova Meter, Quantofix N Volumeter, and a hydrometer. While the Agros and Quantofix meters directly measure the ammonium-N content; the hydrometer indirectly estimates the total content of N, P, and K based on linear relationships with the slurry DM. Samples (73) were collected from dairy farms along Southern Chile (39° to 44° S and 71 to 73° W). Analyses were carried out on laboratory conditions using conventional techniques as well as using each of the quick tests. Results were subjected to straight-line regression analyses. Agros and Quantofix N-NH4+ measurements were accurate (P < 0.01; r² > 0.80). The hydrometer estimations of TN, TP, and TK were also reliable (P < 0.01). Best results were obtained with P (r² = 0.87) and N (r² = 0.79) total contents. To evaluate the kits on-farm and transfer those to dairy producers may constitute a next step towards an efficient management of organic residues in dairy farms in Chile.
author	Salazar S,Francisco Rosas U,Marianela
author_facet	Salazar S,Francisco Rosas U,Marianela
author_sort	Salazar S,Francisco
title	Evaluation of On-Farm Quick Tests on Slurries from Southern Chile Dairy Farms
title_short	Evaluation of On-Farm Quick Tests on Slurries from Southern Chile Dairy Farms
title_full	Evaluation of On-Farm Quick Tests on Slurries from Southern Chile Dairy Farms
title_fullStr	Evaluation of On-Farm Quick Tests on Slurries from Southern Chile Dairy Farms
title_full_unstemmed	Evaluation of On-Farm Quick Tests on Slurries from Southern Chile Dairy Farms
title_sort	evaluation of on-farm quick tests on slurries from southern chile dairy farms
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000300021
work_keys_str_mv	AT salazarsfrancisco evaluationofonfarmquicktestsonslurriesfromsouthernchiledairyfarms AT rosasumarianela evaluationofonfarmquicktestsonslurriesfromsouthernchiledairyfarms
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Evaluation of On-Farm Quick Tests on Slurries from Southern Chile Dairy Farms

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