O objetivo deste trabalho foi avaliar as características físicas, físico-químicas e químicas de frutos de nove genótipos de acerola (Malpighia sp.) cultivados no Município de Anápolis, GO, localizado a 1.000 m de altitude. Os resultados mostraram que nessa região se consegue produção de frutos com elevados teores de vitamina C (acima de 1.000 mg/100 mL de suco). Há, entretanto, uma considerável variabilidade entre os genótipos estudados. Os genótiposde número2, 6, 3, 1 e 7 destacaram-se, atendendo àsprincipais exigências da indústria de suco.

No abstract

There is a contemporary trend of change in the agricultural sector, aiming at the use of ecologically friendly inputs. This trend can be seen by the constant increase in the demand for organic products. However, as with other technologies, there is a need for studies to evaluate the effectiveness of its use. The present study aimed to evaluate the effects of the application of increasing doses of cattle manure on the development and productivity of chili peppers. The treatments consisted of increasing doses of cattle manure (0; 5; 10; 15; 20 Mg ha-1). The variables plant height, stem diameter, number of plant leaves and length, diameter, and fruit yield were evaluated. It was found that, with the maximum amount of cattle manure, there was an increase of 35.96%, 41.12%, 47.84%, and 161.64% concerning the control treatment, without the cattle manure application. Thus, it was concluded that the use of increasing doses of cattle manure, up to 20 Mg ha-1, is beneficial to the development and production of chili pepper.

No abstract

Alternativas aos métodos convencionais de produção de mudas devem ser buscados a todo momento, visando o aumento da qualidade e o retorno ao produtor. Nesse contexto, os resíduos da atividade pecuária, podem constar como opções ao agricultor. O objetivo deste trabalho foi avaliar o uso do esterco bovino como substrato alternativo em combinação com substrato comercial para a produção de mudas de melão. Para a composição dos experimentos foram semeadas duas variedades de melão (Cantaloupe e Amarelo) em bandejas de polietileno de 128 células, com cinco diferentes substratos: 100% esterco, 100% substrato comercial e três misturas de esterco bovino (EB) e substrato comercial (SC) (75/25; 50/50; 25/75, respectivamente), compondo os cinco tratamentos, com quatro repetições em blocos casualisados. Para o melão Cantaloupe, o esterco bovino proporcionou incrementos significativos nas características biométricas das mudas, elevados teores das clorofilas e massa seca de parte aérea e raiz; o tratamento 75% EB + 25% SB apresentou resultados semelhantes para os teores de clorofilas, altura de planta, número de folhas, comprimento de raiz e índice de qualidade de Dickson. Para o melão Amarelo, o esterco bovino não apresentou os mesmos resultados, não ocorrendo diferença entre os tratamentos para os resultados de Clorofilas a e total, altura de planta, número de folhas e comprimento de raiz. O esterco bovino curtido possui potencial para substituir parcialmente ou integralmente o substrato comercial na produção de mudas de meloeiro.

Mimosa setosissima is a tree species, considered rare once its occurrence is restricted to the Cerrado biome. Studies on this species may contribute to its conservation. Thus, the objective of this study was to characterize the fruits (physically) and seeds (physiologically) of M. setosissima to provide supporting information for the commercial and conservational propagation of the species. The pods (n=200 fruits) of M. setosissima were collected from plants present in the Cerrado Rupestre of the Serra dos Pirineus State Park, Goiás, Brazil. The fruit were separated into two maturation classes regarding to the color and texture of the pods (brown and green). The pods of each maturity stage were characterized by the following attributes: fresh weight, length, width, thickness, number of seeds, number of normal and abnormal seeds (dead/rotten/damaged/broken). A germination test was used to evaluate the physiological potential of seeds. The germination test applied in a factorial (2 × 2) randomized design, with two fruit ripening stages (brown and green) and two substrates (between paper and paper roll and on paper in a gerbox) (temperature 25ºC; 12-hour photoperiod; humidity 75%). The morphobiometrics of M. setosissima fruit depends on the maturity stage, where an increased growth was observed in brown fruits. The substrate "between paper and paper roll" is more appropriate to conduct the germination test of seeds M. setosissima. Seeds coming from green pods have a physiological performance higher than that of brown seed pods.

The jabuticaba is a native species that is seeing increased industrial exploitation because of its organoleptic and functional characteristics, making it attractive for food and pharmaceutical products. However, the fruit composition is not favorable for processing because of the abundance of seeds. Techniques already established for other crops should be studied to improve industrial use characteristics. Thus, the objective of this study was to evaluate the development and organoleptic quality of jaboticaba fruits as a function of exogenous applications of gibberellic acid on the stem of plants in three reproductive stages. The treatments consisted of four concentrations of gibberellic acid (0, 50, 100 and 200 mg L-1) applied to jabuticaba plant stems in three reproductive phenological stages (flower buds, anthesis and post-flowering). A randomized complete block design was used with a factorial scheme (4×3) with six replications. It was observed that applications during anthesis and after flowering resulted in lower seed mass values and seed numbers and higher pulp yield, on average 23.08, 22.97 and 20.87%, respectively. The treatment with flower buds and increased gibberellic acid concentrations also resulted in an increased pulp yield, up to a maximum of 12.58%. Thus, it was concluded that the application of increasing concentrations of gibberellic acid, up to 200 mg L-1, improves pulp yield without altering the organoleptic characteristics of jabuticaba fruits and that applications at post-flowering or anthesis provide higher quality for industrial uses.

Papaya is among the main fruit species produced in Brazil, representing high socioeconomic importance in productive regions. Changes in production methodologies aim to meet market demands and sector sustainability. In this sense, the use of organic compounds has been successfully used in the production of seedlings. The objective of the study was to evaluate the potential use of different sources of organic material for the composition of substrates used in the production of papaya seedlings, identifying the effects on the emergence and development of plants. Therefore, the treatments were composed of different substrates, namely: T1 – Soil; T2 – 75% soil and 25% chicken litter; T3 - 75% soil and 25% earthworm humus; T4 - 75% soil and 25% tanned cattle manure. When evaluating the characteristics, it was found that substrates composed of the fractions of earthworm humus and cattle manure allowed increases in the characteristics of shoot length, number of leaves, leaf area and stem circumference, while the presence of chicken litter interfered negatively on all the variables studied. It was concluded that organic compounds have the potential to favor the production of papaya seedlings. In this sense, the composition of the substrate alters the emergence and development of papaya seedlings, and the use of a fraction of 25% of earthworm humus allows the formation of seedlings with greater vigor, while the use of chicken litter in this same proportion should be avoided.