Macronutrient dynamics in leaves and bunches of black pepper

Abstract

The objective of this work was to determine the macronutrient dynamics in leaves and bunches of black pepper (Piper nigrum) throughout the plant reproductive cycles. The experiment was carried out in a commercial field of 'Bragantina' black pepper. Leaves and bunches were sampled every 21 days for one year, during two crop cycles. The bunches were sampled from the twenty eighth day after the appearance of inflorescences until the complete fruit maturation. Samples of leaves and bunches were dried, and the contents of N, P, K, Ca, Mg, and S were determined. N, K, and Ca were the most common macronutrients found in the bunches and leaves of black pepper. The accumulation of dry matter in the bunches was similar for both cycles and it was adjusted to the linear and quadratic models. The accumulation and content of macronutrients followed the dry matter behavior trend. Macronutrient contents in leaves oscillate during the year, and K and Mg vary more than N, P, Ca, and S. The macronutrient contents in black pepper leaves and bunches depends on the plant vegetative stage, and this variation should be considered in the planning of the fertilization management.

Aspectos morfológicos de crescimento e produção de cultivares de pimenteira-do-reino em tutor sustentável de glirícidia na mesorregião do Baixo Tocantins – Pará

“…Pesquisas como a realizada por Paracampo et al (2022), que indicaram que a composição química da pimenta preta produzida em municípios do nordeste do Pará, Brasil, foi influenciada pelas práticas agrícolas e grau tecnológico empregado no sistema de produção, assim como também, os estudos realizados por Dalazen et al (2020;2022), que avaliaram a concentração de macro e micronutrientes de folhas e cachos de pimenteira-do-reino durante um ciclo de dois anos, verificando que o estágio de desenvolvimento da planta influencia a concentração dos nutrientes nos órgãos da planta, devendo o estágio ser considerado para o planejamento da adubação, são indicativos de pesquisas futuras complementares a apresentada aqui, que devem ser repetidas considerando o uso de gliricídia como tutor vivo da pimenteira-do-reino, para verificar possíveis diferenças com o sistema convencional, e fortalecer o emprego desta tecnologia sustentável (gliricídia) no campo com o enriquecimento de informações adicionais a produtores e extensionistas.…”

Simulated herbicide application between rows of black pepper crops

“…It is the world's most valued spice, due to its high economic and social importance to growers. Black pepper crops are concentrated in tropical climate regions, as India, Indonesia, Vietnã, Brazil, and China (Dalazen et al, 2020).…”

Nitrogen effects on leaf gas exchange, vegetative growth and yield of black pepper plants using Gliricidia sepium as living support

“…The authors speculate that adjustments in fertilization could attenuate the competition for nutrients between black pepper and G. sepium in the first year of cultivation under field conditions, inducing a greater vegetative growth and initial grain yield of black pepper (Rodrigues et al, 2019). Such inference has not been examined yet and considering that black pepper requires high amounts of nitrogen (Sim, 1971;Veloso et al, 1999;Veloso et al, 2000;Dalazen et al, 2020), particularly during the following 12 months after planting the seedlings in the field (Chiba and Terada, 1976;Rodrigues et al, 2019), one can hypothesize that adjustments in the nitrogen fertilizing in the first year of cultivation may attenuate the competition for nutrients between black pepper and G. sepium (LS), enhancing both vegetative growth and initial fruit yield of black pepper. The production of biomass depends on the photosynthetic activity, and this is directly related to the gaseous exchanges of the leaves.…”