Coffee Science_v.18, 2023
URI permanente para esta coleçãohttps://thoth.dti.ufv.br/handle/123456789/13916
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Item Initial growth of Coffea canephora: Simulation of organomineral system and Limnoperna fortunei as soil improvement(Universidade Federal de Lavras, 2023-08-17) Barbosa, Mariana Cristina; Sena, Karla Nascimento; Maltoni, Kátia LucieneThe use of residues can be an alternative to mineral fertilization. Manures, sources of nutrients and organic matter, are successfully used in family farming. Another residue that can be used for soil acidity amelioration is the shell of the golden mussel (Limnoperna fortunei), which is rich in CaCO3. This work evaluated the contribution of ground golden mussel shells (GMS) in combination with cattle (CTM) and sheep (SHM) manure to the initial growth of Conilon coffee in an acidic sandy soil. The experiment was carried out in protected cultivation in pots (30 kg) with two Conilon coffee cultivars. The treatments consisted of two doses of CTM (0 or 67 t ha-1) and four doses of GMS (0, 1, 2 and 3 t ha-1), with three replications. Each treatment was incorporated into the soil before the introduction of the seedlings in the experimental units, and 60 days later, a dose of SHM was applied on the soil surface (20 t ha-1). After 180 days, the soil fertility was analysed, and the seedling height, stem diameter, root volume and fresh and dry mass of the aerial parts and roots were measured. Furthermore, the Dickson Quality Index (DQI) was calculated. Both the sheep and the bovine manure increased the pH, the contents of P, MO, K+, Ca2+, and Mg2+, and the cations exchange capacity (CEC) of the soil. The addition of GMS increased the pH and the Ca2+ content while reducing the potential acidity of the soil. A pH above 6.0 reduced the levels of micronutrients in the soil. The use of CTM and SHM shows promise in the initial growth of coffee seedlings (height - H, FMAP, fresh and dry mass of the aerial parts - DMAP, FAR, fresh and dry mass of the root system – DMR diameter, RV root volume and Dickson Quality Index ). Ipiranga 501 surpassed Verdebras G35 in aerial fresh and dry mass, root volume and IQD, with or without the addition of 3 t ha-1 of ground GMS.Item Growth promoting fungi increase the quality of Coffea canephora seedlings Pierre ex a. Froehner(Universidade Federal de Lavras, 2023-04-28) Alves, Jucélia Rodrigues; Celestino, Flávio Neves; Moraes, Alisson Gomes de; Reis, Ricardo Arizono dos; Grecco, Eduardo DomingosGrowth promoting fungi have shown an important role in the development of agricultural crops. Among these fungi, the genus Trichoderma stands out, and the entomopathogenic fungi of the genus Beauveria and Metarhizium have been gaining greater importance. Thus, the aim of the present study was to evaluate the vegetative growth of conilon coffee seedlings inoculated with growth promoting fungi. For the production of seedlings, cuttings of clone A1 of conilon coffee were used, in standard substrate. The growth promoting fungi Trichoderma harzianum, Beauveria bassiana and Metarhizium anisopliae were used at a concentration of 1 x 107 conidia.mL-1, inoculated via soil and leaf. Vegetative growth evaluations were performed at 180 days after cutting. The treatments corresponded to a 4 x 2 factorial arrangement, in a randomized block design, with three replications, totaling 24 plots. The data were submitted to analysis of variance and the means compared by the Scott-Knott grouping method (p ≤ 0.05). The treatments did not promote gains in plant height, stem diameter, root length, root fresh mass, leaf area, shoot/root fresh and dry mass of conilon coffee seedlings. Growth promoting fungi T. harzianum and B. bassiana promoted a greater number of leaf pairs, greater fresh mass of aerial part and greater dry mass of aerial part. Additionally, T. harzianum promoted greater root dry mass in conilon coffee seedlings. Only for the parameter number of leaf pairs, the inoculation via soil was greater than via leaf, while for the other parameters there was no difference regarding the inoculation method.Item Production of Coffea canephora seedlings through cuttings in a nursery and hydroponics using different containers(Universidade Federal de Lavras, 2023-07-19) Lima, Amador Eduardo de; Castro, Elisa de Melo; Cunha, Samuel Henrique Braga da; Guimarães, Rubens José; Chalfun, Nilton Nagib Jorge; Carvalho, Alex Mendonça de; Alves, Eduardo; Carvalho, Milene Alves FigueiredoThe production of seedlings is a determining factor for the establishment and success of the coffee plantation. The objective of this study was to evaluate the production of Coffea canephora seedlings by cuttings in a modified hydroponic system and in a conventional nursery, using different containers. At the end of the experiment, growth (height, stem diameter, total number of pairs of leaves, leaf area, root area, dry matter weight of leaves, stem and root), physiological (chlorophyll a, b and total and stomatal conductance) and anatomical (stomatal density, functionality and opening) characteristics were analyzed. For statistical analysis, a completely randomized design (CRD) was used, with five treatments and six replications, with ten plants per plot. Seedlings produced in a modified hydroponic system using 50- and 120-cm³ tubettes show better vegetative growth and physiological characteristics compared to those produced in a nursery. Seedling management in a modified hydroponic system using 120-cm³ tubettes provides greater cutting survival percentage, number of remaining leaves and emission of shoots. In nurseries, the use of polyethylene bags provides better seedling quality and survival in relation to the use of tubettes, regardless of volume.