Diagnóstico quantitativo e qualitativo da arborização de uma praça pública e de um mirante no município de Icapuí-CE Quantitative and qualitative diagnosis of the afforestation of a public square and a belvedere in the municipality of Icapuí-CE

Com o objetivo de avaliar a potencialidade do uso de esterco de poedeira, comparativamente à adubação convencional na produtividade da Brachiaria brizantha na Zona da Mata Rondoniense, foi desenvolvido um experimento na Fazenda Experimental da Universidade Federal de Rondônia, Campus Rolim de Moura. O delineamento experimental utilizado foi o de blocos casualizados, com três repetições. Os tratamentos constavam de adubação com seis doses de esterco de poedeira (0, 5, 10, 20, 40 e 80 t ha-1) e adubação convencional com 120 kg ha-1 de N, 100 kg ha-1 de P2O5 e 60 kg ha-1 de K2O. Foram realizados sete cortes de avaliação no período de janeiro a julho de 2014, com intervalo de 25 dias entre cada corte e a uma altura de 15 cm do solo, com uma parcela útil de 0,25 m2. As dosagens de 40 e 80 t ha-1 de EP obtiveram as maiores produções de massa fresca e seca sendo superior estatisticamente a adubação convencional, enquanto as doses de 10 e 20 t ha-1 de EP não diferiram do tratamento convencional. Já a testemunha e a dose de 5 t ha-1 de EP foram inferiores ao tratamento com adubação convencional. A produção de matéria seca da Brachiaria brizantha respondeu linearmente ao incremento de adubação orgânica, a maior produção acumulada durante as sete coletas foi estimada em 24720 kg ha-1 MS na dose de 80 t ha-1 de EP. Desta forma conclui-se que a adubação da Brachiaria brizantha com esterco de poedeira se mostrou eficiente comparativamente à adubação convencional quando utilizado dosagem igual ou superior a 10 t ha-1, nas condições edafoclímaticas da zona da mata rondoniense.

The need to diversify agricultural production has fostered the cultivation of several crops under environmental conditions atypical to their origin, justifying the extreme importance of studies on the agricultural management of crops in semiarid regions. In this context, this study aimed to evaluate the effects of irrigation depth and potassium doses on fig quality under semiarid conditions. The experiment was conducted in a 4 × 4 split-split-plot design, in randomized block design, with three replicates. The plots corresponded to four irrigation levels (50%, 75%, 100%, and 125% ETc), the subplots consisted of four potassium doses (0, 60, 120, and 240 g K2O plant−1), and the sub-subplot corresponded to the crop years (2018/19 and 2019/20). Results showed that water deficit reduced fig productivity, and the irrigation levels equal to or greater than 100% ETc performed cumulatively throughout the growing cycles. Therefore, irrigation depths from 85.19% to 95.16% ETc are recommended for greater water-use efficiency and fruit quality. Furthermore, potassium fertilization mitigated water stress in fig plants, allowing for reduced irrigation levels, especially in the second year, without compromising fruit traits.

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Pitanga (Eugenia uniflora L.) is an exotic fruit species of significant economic importance. However, due to genetic variability, its exploitation is hampered by the lack of homogeneous fruit production. In this scenario, this study aimed to select pitanga genotypes according to the physical and physicochemical parameters of fruits grown under semi-arid conditions. The study was developed at the Federal Rural University of the Semi-Arid Region with genotypes resulting from the open pollination of the pitanga variety ‘Tropicana”. Thirty-nine pitanga genotypes were evaluated for fruit mass, fruit length, fruit diameter, soluble solids (SS), titratable acidity (TA), ascorbic acid (AA), pH, and SS/TA ratio. The pitanga genotypes showed high variability. The clustering method separated the genotypes according to desirable traits. Genotype A12 showed the largest fruit sizes, whereas genotype A8 showed the highest SS and TA contents. Genotypes A2, A13, A34, and A39 showed fruits with the highest AT values. On the other hand, genotypes A11, A16, A45, A9, A26, and A44 showed the most significant contents of pH and SS/TA. Highlights The grouping of two genotypes depends on the environmental conditions, mainly on the effect of two genotypes per year. The analysis of principal components allows selecting the genotypes based on their desired characteristics. The physical and chemical composition of two pitanga fruits are affected by climatic conditions, genotypes and years of cultivation.