Evolution of the predictive criteria for the tropical fruit tree nutritional status

Abstract

The diagnosis of plant nutritional status that aims to balance essential elements in the plant is of utmost importance for sustainable agriculture. Nutritional diagnosis is a technique that has been implemented to maximize the economic return from fertilization and minimize losses to the environment. A balance can be defined as a relationship between components interacting in plant tissue, where some nutrients may be present in excess, deficiency or sufficiency. Diagnostic methods have been evolving constantly, allowing to interpret nutrient levels in isolation to more complex methods accounting for nutrient interactions.Additional keywords: Plant nutrition, nutrient composition, nutrient interaction, compositional nutrient diagnosis. ResumoA diagnose nutricional, ou seja, o conhecimento sobre o equilíbrio entre os elementos essenciais no tecido vegetal, é uma técnica empregada para elevar ao máximo o retorno econômico nas explorações agrícolas, preservando de forma racional o ambiente. O equilíbrio pode ser comparado a uma balança de pratos, na qual os nutrientes podem estar presentes em excesso, deficientes ou em teores adequados (informação relativa), considerando-se o teor dos demais componentes. A predição do diagnóstico do estado nutricional das plantas é de extrema importância para a agricultura durável, cujos métodos têm evoluído constantemente, permitindo uma interpretação imparcial dos teores dos nutrientes e de suas interações.Palavras-chave adicionais: Nutrição de plantas, composição nutricional, interação de nutrientes, CND.

Discriminant analysis in the selection of groups of peach cultivars

“…Sharpe et al (1989) reported that the nutritional status assessed at different times affected the nutrient balance of the peach tree grown in the United States. This concurs with observations made under Brazilian conditions for guava cultivation (Rozane et al, 2015b). However, at the same time, the assessment of the nutritional status of a crop under similar edaphoclimatic conditions reveals divergences in the nutritional balance within the crop when variations are present in the cultivar/variety, as reported by Parent et al 2013b However, although divergences between the nutritional patterns of each species, cultivar and edaphoclimatic cultivation condition are evident, the similarities in the nutritional patterns among the genotypes should also be taken into consideration (Parent et al, 2013a;Rozane et al, 2015a).…”

Seasonality in nutrient content of banana diagnostic leaf

“…A likely explanation may be associated with no water restriction in the period, which allows constant flow of nutrients especially for mass flow, the primary means of conduction nutrients to plants as reported by Malavolta (2006) and Oliveira et al (2010), in addition, in the winter, there is a greater accumulation of Degrees-days due to the lower incidence of radiation, thus reducing the photosynthetic efficiency of this plant (TAULYA et al, 2014). This allowed greater accumulation of nutrients in the leaves of both varieties observed in Tables 3 and 6; Rozane et al (2016) indicate that climatic conditions and different periods of harvest of the diagnostic leaf, even though of the same species, provide significant nutritional variations in the nutritional balance of the diagnostic leaf, which ensures that it is reflected in the data of tables 3 and 6 since the nutrients generally tend to migrate to the bunch from stage 4.…”

Machine Learning, Compositional and Fractal Models to Diagnose Soil Quality and Plant Nutrition

“…The CND based on clr aimed initially to replace DRIS for regional diagnosis [16,42,[65][66][67][68][69][70][71][72][73][74][75][76][77][78][79][80]. Thereafter, a website service was made available to Brazilian growers (https://www.registro.unesp.br/#!/sites/cnd/).…”