In recent years, several studies have been developed to understand the impact of fermentation on the final quality of coffee and have indicated that postharvest processing could be a determinant of quality. However, a trend has appeared as a scientific counterpoint, indicating that the interactions between soil, fruit, altitude, and slope exposures with respect to the Sun are important to understand the behavior of the microbiome in coffee. Studies on the microbiota of coffee have addressed its role during the fermentation process, however the knowledge of indigenous microorganisms harbored in fruits and soil of coffee trees growing in fields are essential, as they can contribute to fermentation. Therefore, the aim of this work was to evaluate the influence of topographic and edaphic factors on the bacterial and fungal communities present in the soil and in the fruits of Coffea arabica trees. Samples of fruits and soil were collected from different growing areas at different altitudes and soil conditions. The microbial DNA was extracted and sequenced. The results showed the contribution of environmental factors in the structure of bacterial and fungal communities. The richness, evenness and diversity of the mycobiome and bacteriome were higher in the soil than in the fruits, independent of altitude. In addition, coffee trees at higher altitudes tended to have more bacteria shared between the soil and fruits. The co-occurrence/co-exclusion network showed that bacteria-bacteria connections were greater in higher altitudes. On another hand, fungi-fungi and fungi-bacteria connections were higher in low altitudes. This was the first study that evaluates in deep the influence of environmental factors in the microbiota habiting fruits and soil coffee trees, which may affect the coffee beverage quality.
RESUMO-A cultivar de abacaxi 'Vitória' tem como principais características a resistência à fusariose, ausência de espinhos nas folhas, frutos de forma cilíndrica e de polpa branca. O objetivo deste trabalho foi avaliar o efeito de doses de N, P 2 O 5 e K 2 O no desenvolvimento da folha "D", massa dos frutos, produtividade, produção de mudas e qualidade da polpa do fruto -sólidos solúveis (SS) e acidez titulável (AT). Os tratamentos foram constituídos de cinco níveis de N: 0; 214; 428; 642 e 856 kg ha -1 ; cinco níveis de P 2 O 5 : 0; 75; 150; 225 e 300 kg ha -1 , e cinco níveis de K 2 O: 0; 150; 300; 450 e 600 kg ha -1 dispostos em fatorial fracionado do tipo (1/5) 5 3 em blocos. Doses crescentes de N promoveram maior crescimento da folha "D", produção de mudas, desenvolvimento do fruto e produtividade. A produtividade e a massa média do fruto com coroa alcançaram os valores máximos de 65,0 t ha -1 com 647 kg ha -1 de N e 1.247 g com 660 kg ha -1 de N, respectivamente. Os valores de AT e SS cresceram linearmente em função das doses de potássio implementadas, ao passo que a elevação das doses de nitrogênio apresentou efeito oposto. Mesmo com a baixa disponibilidade de P, não houve resposta a este nutriente. Termos para indexação: Ananas comosus var. comosus, Fusarium guttiforme, fertilização, NPK. EFFECT OF FERTILIZATION WITH NITROGEN, PHOSPHORUS AND POTASSIUM ON GROWTH, YIELD AND FRUIT QUALITY OF PINEAPPLE 'VITORIA'ABSTRACT-The pineapple cultivar Vitória has as main characteristics resistance to fusariosis, absence of spines on leaves, cylindrical fruit shape and white pulp. The objective of this study was to evaluate the effect of N, P 2 O 5 and K 2 O levels on "D" leaves development, fruit weight, yield, slip production and quality of fruit -soluble solids (SS) and titratable acidity (TA). The treatments consisted of five levels of N (0, 214, 428, 642 and 856 kg ha -1 ), five levels of P 2 O 5 (0, 75, 150, 225 and 300 kg ha -1 ), and five levels of K 2 O (0, 150, 300, 450 and 600 kg ha -1 ), arranged in fractional factorial design (1/5) 5 3 in blocks. Increasing doses of N promoted greater vegetative growth of "D" leaves, slip production, fruit development and yield. Yield and fruit weight with crown reached maximum values of 65.0 t ha -1 with 647 kg ha -1 of N and 1,247 g with 660 kg ha -1 of N, respectively. The values of TA (%) and SS increased linearly with the levels of potassium applied, while increasing the levels of nitrogen had the opposite effect. Even with the low availability of P there was no response to this nutrient.
abstRact:The cultivation of different species of cover crops enables the improvement and conservation of soil and organic matter, in addition to promoting significant yield increases in subsequent crops, with significant economic gains. The objective of this study was to evaluate the growth and productivity of green corn on different soil covers in an organic no-tillage system. The work used a randomized block design, with 6 repetitions and 5 treatments, consisting of 3 soil covers in an organic no-tillage system, with black oat straw, white lupine straw and straw of the intercropping oat/lupine, as well as 2 systems without straw and with revolved soil, an organic one and a conventional. Evaluations of culm diameter, plant height and insertion of the corn ears were carried out, at stages V5, V10 and R3, as well as of total number of marketable ears, the total productivity of ears with and without straw, average weight of ears with and without straw, productivity, average weight and percentage of marketable ears, length and diameter of marketable ears without straw. The organic no-tillage system on the white lupine straw in single and intercropped with black oat provided greater growth of corn plants at the early stages of culture. The use of white lupine single or intercropped with black oat showed itself as good option for straw training in an organic no-tillage system, ensuring satisfactory growth and productivity for the green corn crop.
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