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| Registros recuperados : 71 | |
| Registros recuperados : 71 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Uva e Vinho. |
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Data corrente: |
20/06/2007 |
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Data da última atualização: |
13/04/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - A |
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Autoria: |
NACHTIGALL, G. R.; DECHEN, A. R. |
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Afiliação: |
GILMAR RIBEIRO NACHTIGALL, CNPUV; Antonio Roque Dechen, USP/DECHEN. |
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Título: |
Testing and validation of DRIS for apple tree. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Scientia Agricola, Piracicaba, v. 64, n. 3, p. 288-294, 2007. |
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Idioma: |
Inglês |
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Conteúdo: |
To evaluate three procedures of the calculation of DRIS indices, as well as the efficiency of DRIS as a method for the interpretation of apple tree leaf analyses. This study uses data collected in apple producing areas of the Rio Grande do Sul and Santa Catarina States, Brazil. The concentrations of nitrogen, phosphorus, potassium, calcium, magnesium, boron, copper, iron, manganese, and zinc were determined in the leaf samples. The validation of the DRIS method used results of an experiment of potassium fertilization. The DRIS indices were calculated using two criteria for the choice of the ratio order of nutrients (F value ? ratio of variance of the relationships among nutrients between the reference group and the low productivity group, and R value - correlation coefficients between the productivity and the relationship between pairs of nutrients) and three forms of calculation of nutrient functions (methods of Beaufils, Jones and Elwali & Gascho). The Nutritional Balance Index (NBI) presented negative correlation with the productivity in all combinations. The DRIS method described by Elwali & Gascho, using the F value, presented a performance similar to the criterion of sufficiency range, and it can be used for the interpretation of foliar analysis of apple trees, because it presents values of the nutritional balance index that indicates the nutritional status of the plants, and for the efficiency in the nutritional diagnosis of the crop. Key words: Malus Domestica, foliar diagnosis, nutritional balance MenosTo evaluate three procedures of the calculation of DRIS indices, as well as the efficiency of DRIS as a method for the interpretation of apple tree leaf analyses. This study uses data collected in apple producing areas of the Rio Grande do Sul and Santa Catarina States, Brazil. The concentrations of nitrogen, phosphorus, potassium, calcium, magnesium, boron, copper, iron, manganese, and zinc were determined in the leaf samples. The validation of the DRIS method used results of an experiment of potassium fertilization. The DRIS indices were calculated using two criteria for the choice of the ratio order of nutrients (F value ? ratio of variance of the relationships among nutrients between the reference group and the low productivity group, and R value - correlation coefficients between the productivity and the relationship between pairs of nutrients) and three forms of calculation of nutrient functions (methods of Beaufils, Jones and Elwali & Gascho). The Nutritional Balance Index (NBI) presented negative correlation with the productivity in all combinations. The DRIS method described by Elwali & Gascho, using the F value, presented a performance similar to the criterion of sufficiency range, and it can be used for the interpretation of foliar analysis of apple trees, because it presents values of the nutritional balance index that indicates the nutritional status of the plants, and for the efficiency in the nutritional diagnosis of the crop. Key words: Malus Domestica, folia... Mostrar Tudo |
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Palavras-Chave: |
Doagnose foliar; DRIS; Equilíbrio nutricional. |
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Thesagro: |
Fruticultura; Maçã. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/195825/1/ScientiaAgricolaNachtigall-2007-v64.pdf
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Marc: |
LEADER 02064naa a2200193 a 4500
001 1541791
005 2019-04-13
008 2007 bl uuuu u00u1 u #d
100 1 $aNACHTIGALL, G. R.
245 $aTesting and validation of DRIS for apple tree.$h[electronic resource]
260 $c2007
520 $aTo evaluate three procedures of the calculation of DRIS indices, as well as the efficiency of DRIS as a method for the interpretation of apple tree leaf analyses. This study uses data collected in apple producing areas of the Rio Grande do Sul and Santa Catarina States, Brazil. The concentrations of nitrogen, phosphorus, potassium, calcium, magnesium, boron, copper, iron, manganese, and zinc were determined in the leaf samples. The validation of the DRIS method used results of an experiment of potassium fertilization. The DRIS indices were calculated using two criteria for the choice of the ratio order of nutrients (F value ? ratio of variance of the relationships among nutrients between the reference group and the low productivity group, and R value - correlation coefficients between the productivity and the relationship between pairs of nutrients) and three forms of calculation of nutrient functions (methods of Beaufils, Jones and Elwali & Gascho). The Nutritional Balance Index (NBI) presented negative correlation with the productivity in all combinations. The DRIS method described by Elwali & Gascho, using the F value, presented a performance similar to the criterion of sufficiency range, and it can be used for the interpretation of foliar analysis of apple trees, because it presents values of the nutritional balance index that indicates the nutritional status of the plants, and for the efficiency in the nutritional diagnosis of the crop. Key words: Malus Domestica, foliar diagnosis, nutritional balance
650 $aFruticultura
650 $aMaçã
653 $aDoagnose foliar
653 $aDRIS
653 $aEquilíbrio nutricional
700 1 $aDECHEN, A. R.
773 $tScientia Agricola, Piracicaba$gv. 64, n. 3, p. 288-294, 2007.
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Embrapa Uva e Vinho (CNPUV) |
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