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URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3352
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Item Coffee seedling growthafter legume cultivation in soils with contrasting phosphorus contents(Editora UFLA, 2021) Pereira, Djalma Silva; Costa, Liovando Marciano da; Carmo, Davi Lopes do; Rocha, Ana Caroline Teixeira; Pereira, Antônio AlvesCoffee seedling growth depends on soil phosphorus (P) availability and may be influenced by from pre-cultivation with legumes. Efficient and sustainable ways to increase the bioavailability of P through the recovery of P adsorbed by the soil matrix should be sought. This study proposed to evaluate the growth and P-use efficiency of coffee seedlings cultivated in soils with different P availability after cultivation with legumes. The experiment was carried out in a fully randomized design. Treatments were arranged in a factorial scheme [(2 x 4) + 1]: two soil types, pre-cultivation with four legume species, and one control (without pre-cultivation). The studied soils comprised a Typical Acriferic Red Oxisol (LVwf) with low-P availability and a Typical Chernossolic Litholytic Entisol (RLm) with high-P availability. The legume species Crotalaria juncea, Cajanus cajan, Canavalia ensiformis, and Mucuna aterrima were previously cultivated for 45 days. Afterwards, coffee seedlings were transplanted to the pots, which were then grown for 120 days until evaluations. We assessed the following parameters: plant height (H), stem diameter (SD), shoot dry matter (SDM), root dry matter (RDM), total dry matter (TDM), and shoot contents of macronutrients. Our results showed that coffee seedlings grew more when cultivated in the high-P availability soil, with increments of 13.05% in H, 4.86% in SD, 46.98% in SDM, 17.61% in RDM, and 41.80% in TDM.We also observed an increase of 28.09% in shoot P contents for coffee seedlings grown in RLm. Moreover, pre-cultivation with C. juncea provided the largest increases in coffee seedling growth compared to the control. When grown after C. ensiformis cultivation, coffee seedlings had the highest shoot contents of P, Ca, Mg, and S, which, compared to control, increased by 45%, 39%, 18%, and 17%, respectively.Item Decomposition and nitrogen mineralization from green manures intercropped with coffee tree(Editora UFLA, 2018-01) Cardoso, Rosileyde Gonçalves Siqueira; Pedrosa, Adriene Woods; Rodrigues, Mateus Cupertino; Santos, Ricardo Henrique Silva; Cecon, Paulo Roberto; Martinez, Herminia Emilia PrietoThe knowledge about the rate of decomposition and nitrogen mineralization of green manures provides synchronization with the higher absorption stage by the coffee tree. The rate of decomposition and nitrogen mineralization varies according to the species of green manure and with the environmental factors. The aim of the present study was to evaluate the decomposition and nitrogen mineralization of two green manures intercropped with coffee trees for three different periods. The experiment was divided into two designs for statistical analysis, one referring to the characterization of plant material (fresh mass, dry matter, dry matter content, nitrogen concentration and accumulation in the jack bean (Canavalia ensiformis) and hyacinth bean (Dolichos lablab) and another to evaluate the rate of decomposition and N mineralization of these species. The decomposition rate decreased in both species as their growth time increased in the field. The decomposition was influenced by the phenology of green manures. Nitrogen mineralization of the jack bean decreased as the growth period in the field increased and was faster than hyacinth bean only when cut at 60 days. The N mineralization was slower than mass decomposition in both species.Item Intercropping period between species of green manures and organically-fertilized coffee plantation(Editora UFLA, 2018-01) Cardoso, Rosileyde Gonçalves Siqueira; Pedrosa, Adriene Woods; Rodrigues, Mateus Cupertino; Santos, Ricardo Henrique Silva; Martinez, Hermínia Emília Prieto; Cecon, Paulo RobertoThe adequate supply of nitrogen to coffee plantation is one of the main challenges of organic agriculture. The aim of the present study was to evaluate the effect of organic fertilization with two legume species in different intercropping periods on nitrogen nutrition, initial growth and productivity of coffee plantation. The experimental design was in randomized blocks, in 2x4 split-plot factorial design, being that the plot consisted of two intercrops (coffee+jack bean and coffee+hyacinth bean) and the four intercropping periods (30, 60, 90 and 120 days after sowing of the legume), and the subplot by 50% and 100% of fertilization for the coffee plantation. The increase in the intercropping period between legumes and coffee plantation favored a greater increase in height and node number of coffee trees, besides showing higher heights when fertilized with 50% of the recommended dose and intercropped with hyacinth bean. The intercropping with the hyacinth bean resulted in a larger crown diameter of coffee trees in 2010 and a larger diameter accumulated in the two evaluated years. Higher N contents were found in coffee trees fertilized with 100% of the recommended dose. The legumes supplied the nutritional requirements of the coffee harvest fertilized with 50% of the dose. The bean yield of the processed coffee is not affected by the intercropping with the green manures of jack bean or hyacinth bean.Item Consorciação em cafeeiros orgânicos por diferentes períodos com feijão-de-porco ou lablabe(Editora UFLA, 2014-10) Moreira, Guilherme Musse; Barrella, Tatiana Pires; Martins Neto, Fábio Lúcio; Martinez, Herminia Emilia Prieto; Santos, Ricardo Henrique SilvaObjetivou-se, neste trabalho, avaliar o efeito de períodos de consorciação com lablabe ou feijão-de-porco sobre o crescimento e produtividade de cafeeiros. Os tratamentos corresponderam à combinação fatorial entre leguminosas e períodos de consorciação (30, 60, 90 e 120 dias após plantio) mais uma testemunha. O experimento foi conduzido durante dois anos em Rio Pomba, Minas Gerais, Brasil. Foram avaliadas a produção de massa das leguminosas, o crescimento e produção dos cafeeiros. Houve acúmulo linear de massa das leguminosas em função do tempo de consorciação. No primeiro ano, o feijão- de-porco (2,65 t ha -1 ) acumulou mais massa que a lablabe (1,89 t ha -1 ). No segundo ano, a lablabe acumulou 5,74 t ha -1 e o feijão-de-porco 2,89 t ha -1 , aos 120 dias. No primeiro ano, o aumento do período de consorciação com a lablabe resultou em redução do diâmetro de copa e do número de folhas por ramo dos cafeeiros. Já no segundo ano, o cafeeiro cresceu mais quando consorciado com a lablabe do que com feijão-de-porco. Comparativamente à testemunha, as leguminosas reduzem a produtividade dos cafeeiros com a consorciação, apresentando contudo efeitos diferentes em função da espécie e período de consorciação.