DRIS norms for evaluating the nutritional state of apple tree

Nachtigall, G. R.; Dechen, Antonio Roque

doi:10.1590/s0103-90162007000300011

Cited by 23 publications

(11 citation statements)

References 7 publications

(13 reference statements)

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“…Serra et al (2010) também relataram menores coeficientes de determinação para o N na cultura do algodoeiro. Esses baixos valores de R 2 para o N pode indicar que o balanço do nutriente na planta seja muito sensível às concentrações dos outros nutrientes, enquanto o balanço dos demais elementos seriam influenciados principalmente por variações em suas próprias disponibilidades, conforme sugerido para a cultura da maçã (Nachtigall & Dechen, 2007).…”

Section: Resultsunclassified

Níveis críticos e faixas de suficiência de nutrientes derivados de métodos de avaliação do estado nutricional da palma-de-óleo

Matos

Fernandes

Wadt

2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi determinar níveis críticos e faixas de suficiência de nutrientes para a palma-de-óleo (Elaeis spp.), a partir de métodos de avaliação do estado nutricional das plantas. Utilizaram-se os métodos chance matemática (ChM), sistema integrado de diagnose e recomendação (DRIS) e diagnose da composição nutricional (CND), além da avaliação do nível crítico obtido pela distribuição normal reduzida (DNR) em dados de produtividade e do teor de nutrientes de 144 amostras foliares de plantios no Pará. As regressões dos índices DRIS e CND com os teores foliares foram todas significativas, e o menor coeficiente de determinação foi encontrado para N. Os intervalos das faixas de suficiência obtidos com os métodos ChM, DRIS e CND nos talhões nutricionalmente equilibrados foram, em geral, mais estreitos do que os reportados na literatura, com poucos diagnósticos concordantes, sobretudo para K. Os níveis críticos obtidos pela DNR situaram-se dentro do intervalo das faixas nutricionais obtidas com os outros métodos. Os métodos ChM, DRIS, CND e DNR são adequados para a obtenção de valores de referência nutricionais e indicaram N, Ca, S, Mn e Zn como os nutrientes com maior frequência de deficiência nos talhões de palma-de-óleo avaliados.Termos para indexação: Elaeis guineensis, Elaeis oleifera, chance matemática, diagnose da composição nutricional, DRIS, nutrição de plantas. Critical levels and nutrient sufficiency ranges derived from methods for assessing the nutritional status of oil palmAbstract -The objective of this work was to determine critical levels and nutrient sufficiency ranges for oil palm (Elaeis spp.), using methods for assessing the nutritional status of the plants. The methods of mathematical chance (ChM), diagnosis and recommendation integrated system (DRIS), and compositional nutrient diagnosis (CND), besides the critical level obtained by the reduced normal distribution (DNR), were used in productivity data and in nutrient content of 144 leaf samples of oil palm plantations in the state of Pará, Brazil. The regressions of the DRIS and CND indexes with leaf nutrient contents were all significant, and the lowest coefficient of determination was found for N. The sufficiency range intervals obtained with the ChM, DRIS, and CND methods in the nutritionally balanced stands were, in general, narrower than the ones reported in the literature, with few concordant diagnostics, mainly for K. The critical levels obtained with DNR were within the nutritional range intervals obtained with the other methods. ChM, DRIS, CND, and DNR are suited methods for obtaining nutritional reference values, and they indicated N, Ca, S, Mn, and Zn as the nutrients with the highest frequency of deficiency in the evaluated oil palm orchards.

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Section: Resultsunclassified

Níveis críticos e faixas de suficiência de nutrientes derivados de métodos de avaliação do estado nutricional da palma-de-óleo

Matos

Fernandes

Wadt

2016

Pesq. agropec. bras.

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“…Our results are in accordance with previous studies [20,22,23] and demonstrate that the development of the fruit trees nutritional status depends significantly on the proportion between their vegetative and generative growth. This finding is in contrast with the philosophy of the particular nutrient diagnostic systems, especially concerning the causality of the relationship between the crop nutrition status and the crop load [33,34]. Such relation appears reasonable for annual crops as their yield is tightly related to their actual growth connected to their nutrition status, but hardly applicable in perennial crops.…”

Section: Interpretation Of the Relationship Of The Crop Load And Nutritional Status Of Fruit Treesmentioning

confidence: 75%

“…These models consider the content of particular nutrients and allow evaluation of the nutrient ratios. They operate with a premise that the maximum crop yield can be achieved only when contents of important nutrients are near the ideal or optimum values that are obtained from high yield reference populations [32][33][34]. The question remains, whether the philosophy of these models fully cohere with the above-mentioned demand of perennial plant for nutrients.…”

Section: Introductionmentioning

confidence: 99%

Linking Mineral Nutrition and Fruit Quality to Growth Intensity and Crop Load in Apple

et al. 2021

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Diagnostic of the nutritional status in fruit trees can be estimated using different models. However, these models usually do not fully match the character of the perennial crops and their accuracy needs to be improved. This study aimed at deepening the understanding of the aspects controlling mineral content of macro- and micronutrients and fruit quality of the apple trees with respect to the crop load and vegetative shoot growth. The focus was given on description of the nutrient content variability in time and space, its relation to important physiological events, and conditions altering their gradient in leaf and fruit. The evaluation was carried out with six years old 'Golden Delicious' apple trees on M9, planted in an experimental orchard. Flowering rate, total yield, shoot growth intensity, mean fruit weight and quality along with mineral content of leaves, and fruit in different development stages were analysed according to intensity of natural or regulated flowering and fruit set, respectively. We found that aside of macroelements, iron, and manganese depended on the crop load. For nitrogen, phosphorus, and potassium content, their gradient increased up to 10–25% within the sufficiency range as the trees tried to maintain certain level of these nutrients in leaves and fruit simultaneously during deficit. In contrary, the higher content of Mg, Fe, and Mn related to the avoidance of deficit through up to 20–30% higher uptake in trees with higher crop load. Phosphorus, potassium, and calcium content in short fruiting shoots was more stage dependent, showing relation with the timing of cessation of particular meristematic growth activity. If no intense deficit occurred, the trees kept unrestricted initial investment of nutrients in the fruit during cell division stage whatever the crop load was. Their content at the later development stages appeared to be more dependent upon the consumption by particular sink. These findings allowed to improve the interpretation of the fruit trees nutrition status due to adaptation of the reference nutrient content in low cropping trees by a reduction of 5–10% N and P, 10–15% Ca, as well as by an increase of 15–20% K content in leaves at the stage with fruit size of 20 mm, and without change in P content at the stage of about 70% of final fruit size.

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“…The predominant soils in these areas are the Humic Xanthic Hapludox and Tipic Hapumbrept. The methodology used for the collection of the samples, for the accomplished analytical determinations and for the establishment of the DRIS norms for the apple tree crop is described in Nachtigall & Dechen (2007).…”

Section: Methodsmentioning

confidence: 99%

Testing and validation of DRIS for apple tree

Nachtigall

Dechen

2007

Sci. agric. (Piracicaba, Braz.)

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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.

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DRIS norms for evaluating the nutritional state of apple tree

Cited by 23 publications

References 7 publications

Níveis críticos e faixas de suficiência de nutrientes derivados de métodos de avaliação do estado nutricional da palma-de-óleo

Níveis críticos e faixas de suficiência de nutrientes derivados de métodos de avaliação do estado nutricional da palma-de-óleo

Linking Mineral Nutrition and Fruit Quality to Growth Intensity and Crop Load in Apple

Testing and validation of DRIS for apple tree

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