Chlorine Nutrition of Oil Palm Tree (Elaeis Guinq Jacq) in Eastern Amazon

Abstract

In Brazil, the status of chlorine (Cl) nutrition in plants is still poorly studied. The micronutrient Cl plays an important role in cultures such as coconut and oil palm trees. This study aimed to evaluate the status of chlorine nutrition in oil palm trees as a function of planting age, which ranged from two to eight years of cultivation. The experiment was conducted in Tailândia, state of Pará, Brazil. The soil of the area is characterized as Yellow Latosol of medium texture. A total of four oil palm trees were sampled for each age and the following variables were analyzed: leaf, petioles, rachis, palm heart, arrows, stipe, male inflorescences, peduncles, spikelets and fruits, as well as the accumulated, recycled and immobilized levels of Cl. Oil palm trees proved to be demanding in Cl and the accumulation in the different vegetative organs increased with the development of the plant. The stipe was the main storing vegetative organ of this micronutrient. The highest demand of Cl (16.9-26.0 g/kg) occurred in the palm heart, while for male inflorescence, the values ranged from 3.3-4.1 g/kg of Cl. The levels of Cl recycled by the plant were higher than the immobilized and exported levels considering the development up to 4 years of age. After this age, the levels of recycled Cl are lower than those immobilized. As for the amount of Cl exported by clusters in 8-year-old plants, the values were 3.2 and 1.3 times lower than the recycled and immobilized levels, respectively.

A new approach to the nutritional status of manganese in oil palm plants cultivated in the eastern Amazon

“…On the other hand, male inflorescences showed less variation (26%) in Mn concentrations (82.0 to 103.75 mg kg -1 of Mn). Viégas et al (2020), evaluating Cl in oil palm trees, also observed greater variation in the nutrient contents in the palm heart of the plants. According to these authors, these variations alter the metabolism of the plant and, consequently, the uptake rates of nutrients, since at the beginning of vegetative development the production is still relatively low (6 to 8 t ha -1 year -1 bunches), gradually increasing until the plants reach eight years, reaching the maximum yield of 20 to 30 t ha -1 year -1 of bunches.…”

“…The nutritional needs of oil palm are large and vary widely, depending on yield, planted genotype, spacing, palm age, type and soil cover conditions, climate, and other environmental factors (Woittiez et al, 2017). About the micronutrients, there are few long-term studies developed with oil palm plants, however, some reports are found in the literature (Viégas et al, 2019;Viégas et al, 2020;Viégas et al, 2021). The evaluation of commercial oil palm nutrition in Pará pointed to Zn and Mn as the most deficient micronutrients in this palm tree (Matos et al, 2016).…”

Phosphorus in Oil Palm Cultivated in the Oriental Amazon

“…Variation of P concentrations was higher in palm heart (Table 3). Viegas et al (2020) evaluated Cl in oil palm and observed greater variation in P concentrations in palm heart of plants. According to the authors, these variations alter plant metabolism and, consequently, the absorption rates of nutrients.…”

Evaluation of the omission of nutrients in the mineral development and composition of young cupuaçuzeiro plants (Theobroma grandiflorum (Willd. ex Spreng.) Schum.) progeny 61

“…Based on this, some researchers seek to remedy the existing gaps in the field of soil fertility in the Amazon region, researching the nutritional needs of the main crops for the region (Lima et al, 2018;Silva et al, 2018;Mera et al, 2020;Viégas et al, 2020;Tanaka et al, 2020;Lima et al, 2020). Research, Society and Development, v. 10, n. 1, e36110111721, 2021 (CC BY 4.…”