The Use of DRIS for Nutritional Diagnosis in Oil Palm in the State of Pará

Abstract

ABSTRACT:The oil palm crop has expanded significantly in the state of Pará, which has not been followed in a proportional manner by studies aiming at increasing yield through plant nutrition. The objective of this study was to evaluate general and specific norms of the Diagnosis and Recommendation Integrated System (DRIS) for genetic materials of oil palm (African and interspecific hybrid) at two ages (young and adult plants) and evaluate possible deficiencies in fertilization and soil correction practices. The DRIS norms were composed of means, standard deviations, and coefficients of variation of bivariate, specific, and general relationships among nutrients of 144 leaf samples. The DRIS norms specific for genetic material did not differ from the general norms; however, a large number of differences were found between specific bivariate relationships for age groups, among themselves, and in relation to the general norms. The regression analysis between the nutritional balance index and yield were better explained when age groups were discriminated. In the young plants, the number of cases of stands with deficiencies followed the order Ca > Fe > B > S > Mn > K > Mg = Cu > Zn > N > P; and for adults, this order was Ca > Mn > Zn > Fe > S = B > N = Cu > K > Mg > P. The DRIS norms can be utilized in diagnostics regardless of genetic material; however, they must be specified for the age of the plant. Most of the stands showed deficiency in Ca and micronutrients, coinciding with the least used nutrients in oil palm crops in the state of Pará, as well as emphasizing the need for soil liming.

Sistema Integrado de Diagnóstico y Recomendación, su aplicación y utilidad en la agricultura. Una Revisión

“…The nutritional diagnosis of crops is done with the results of chemical fertility analysis of soils, using the nutritional requirements of the studied species (Chacón-Pardo et al, 2013a;González, 2017;Herrera, 2015) and frequently the interpretation of nutrient concentrations in leaf tissue with widely used methods such as Critical Levels and Sufficiency Ranges (Bangroo et al, 2010;Savita et al, 2016). These methods are based on the individual comparison of the nutrient concentration in the sample with an accepted value of normality for a certain phenological stage without taking into account the relationships between nutrients and their possible imbalances (Kania & Callejas, 2011).…”

Current Knowledge on Interspecific Hybrid Palm Oils as Food and Food Ingredient

“…Recent papers describe several characteristics of O × G hybrids, such as phenological stages, bunch morphology and yield [24,[38][39][40][41][42][43], agronomic performance [44][45][46][47], fruit abscission process [48], and genome size [15,49,50]. Even the mycorrhization process [51] and hydroponic cultivation [52] have been assessed, but limited investigations have been carried out regarding the interspecific hybrid palm oil (HPO) composition and its use in food products.…”

Chemical Characteristics and Nutritional Properties of Hybrid Palm Oils

“…Only in recent years, a wide range of characteristics of O×G interspecific hybrids has been thoroughly studied and described: yield and morphology [15][16][17][18][19]; phenological stages [20]; genome size [21,22]; sensitivity to water stress [23,24]; physiological and biochemical response to aluminum toxicity [25]; nutritional status [26]; seed germination [27]; fruit abscission process [28]; and mycorrhization process [29]. Even a comparative characterization of the physiological and biochemical performance of seedlings of O×G hybrids grown in hydroponics was carried out [30].…”