Camu-camu Root Distribution under Different Nitrogen and Potassium Doses through Drip Fertigation

Abstract

Camu-camu is an native species in domestication processes. Therefore, studies related to the root system are necessary to evaluate the best cultivation practices for an orchard. Two trials were conducted, one with nitrogen (N) and the other with potassium (K), at doses of 0, 40, 80, 160, and 320 kg · ha -1 . Root distribution was determined using nondestructive analyses in which two-dimensional (2D) root images were obtained from trenches under the plants' canopy. Variables included width (measured in cubic millimeters), area (measured in square millimeters), and length (measured in millimeters, and were analyzed using Safira software (version 2010, Embrapa, Brazil). To have better spatial visualization of variable distribution in the soil profile, data were analyzed using the ordinary kriging technique with the geoR software package and R software (version 2016). Both N and K doses influenced positively the camu-camu root system with regard to length, volume, and area. Better root distribution was verified with 80 kg · ha L1 N and 160 kg · ha L1 K doses. The nondestructive analysis via 2D images allowed sound characterization of root spatial distribution.Camu-camu is an native species of the Amazon Basin that attracts attention as a result of its high content of vitamin C, reaching up to 7355 mg/100 g pulp in native populations of Roraima State (Chagas et al., 2015). It is currently considered functional food, with

Spatial distribution and effective depth of roots of camu-camu with and without mulch

“…Para isso, foram abertas seis trincheiras a 0,5 m de distância do caule da planta, com dimensões de 1,40 m de largura x 1,80 m de comprimento x 1,40 m de profundidade, em forma longitudinal à linha das plantas de camu-camu. A avaliação das raízes foi realizada na parede vertical da trincheira sob a projeção das plantas de acordo com a metodologia de Melo et al (2019), para isso, o solo foi escarificado ao longo da parede com um jato de água para expor as raízes. Após este procedimento as raízes foram pintadas com tinta spray de cor verde para aumentar o contraste em relação ao solo da parede da trincheira (Figura 2A, 2B, 2C y 2D).…”

Interculturalidad, educación, ciencias, desarrollo y sociedad

“…Thus, "propagation of promising camu-camu subsamples becomes a viable alternative for the obtainment of homogeneous plants with desirable characteristics, and which are adapted to the soil and climatic conditions of a particular region" (Almeida et al, 2014;Delgado et al, 2015;Melo et al, 2019). Therefore, the availability of plant material which is genetically uniform, productive and presents excellent propagation capacity is key to the expansion and promotion of camu-camu culture in Northern Amazon, especially in Roraima state.…”

Potential Vulnerability of Natural Populations of Camu-camu (Myrciaria dubia) to Anthropogenic Stressors in Southwestern Amazon

“…Agronomic research has concentrated on adapting the species for cultivation on terra firme (Melo et al, 2019;Monteiro et al, 2020;Pinedo-Panduro et al, 2010) and selecting favored traits i.e., higher concentration of vitamin C, larger fruits and resistance to pests (Chagas et al, 2015, Pinedo-Panduro et al, 2010Yuyama & Valente, 2011). Germplasm collections with specimens from all the Amazon basin are active in Brazil at INPA (Instituto Nacional de Pesquisa da Amazônia) and EMBRAPA, with ex-situ collections in Manaus, Belem and Boa Vista (Nascimento et al, 2013;Sakazaki et al, 2022;Yuyama & Valente, 2011), and in Peru at IIAP (Instituto de Investigaciones de la Amazonía Peruana) from western Amazonia (Pinedo-Panduro et al, 2020;Šmíd et al, 2017).…”