With the need of a large-scale seedling production, the application of purple nutsedge extract may represent a promising alternative, contributing to the fruit species propagation. The aim of this study was to evaluate the effects of nutsedge extract on the survival rate, rooting and biomass of acerola’s mini-cuttings. The experimental design was a completely randomized block, with a 5x2 factorial arrangement (five aqueous purple nutsedge extracts of nutsedge (0%, 25%, 50%, 75% and 100%) and two types of mini-cuttings, a pair of entire leaves and a pair of half leaves) resulting in 10 treatments with 5 repetitions and 8 mini-cuttings per repetition. The evaluations were performed at 75 days after planting, when destructive analysis were carried out for morphological characteristics. The evaluates variables were mini-cuttings survival percentage, percentage of mini-cuttings with sprouts, percentage of mini-cuttings with callus, percentage of minicuttings with roots, root system length, shoot dry mass, root dry mass, total dry biomass and the ratio between shoot and root dry mass. For the experiment conditions, the nutsedge extract positively influenced the survival percentage and percentage of sprouting of acerola’s mini-cuttings, however the extract application did not influence the mini-cuttings biomass of, being the results observed with or without the cut on mini-cuttings leaves.

Qualidade de frutos da goiabeira cv. Paluma submetida a podas de frutificação em diferentes épocas no município de Mossoró -RN Nativa, Sinop, v.5, n.1, p.5-8, jan./fev. 2017. Pesquisas Agrárias e Ambientais

A fenologia pode ser definida como o estudo dos eventos periódicos da vida da planta em função da sua reação às condições do ambiente, e sua importância está relacionada ao manejo que pode ser desenvolvido para as culturas em função desses resultados. Com o objetivo de avaliar a fenologia do coqueiro, um experimento foi conduzido no pomar didático da Universidade Federal Rural do Semi-Árido-UFERSA. A área experimental foi composta por coqueiros da variedade anão verde com quatro anos de idade, propagadas via sementes e plantadas no espaçamento de 7,5 m x 7,5 m, irrigadas por microaspersão. Foram selecionadas, aleatoriamente, quarenta plantas, para as quais foram realizadas as observações fenológicas semanalmente, durante o período de janeiro a outubro de 2015. Foram analisadas as seguintes variáveis: altura da planta, comprimento e diâmetro do estipe, comprimento da folha n° 14, emissão do 2º, 3° e 4° cacho, número de folhas vivas, número de inflorescências totais por planta, número médio de frutos com 5, 6, 7 e 8 meses de idade, número de frutos totais e porcentagem de abortamento de frutos do cacho com 5, 6, 7 e 8 meses de idade. Os caracteres vegetativos e reprodutivos são influenciados pela idade da planta, assim como pelas condições climáticas.

<p>The production of quality coffees, with different sensory characteristics, is strongly related to drying techniques. Experiments were carried out on coffee fruits, with the presence and absence of the fruit turnover process during drying in the yard, Catuaí Vermelho 144 coffee fruits, from the Cerrado Mineiro, processed dry and wet. The treatments consisted of natural parchment, natural green, peeled parchment and demucilated parchment fruits, which were dried in a concrete yard. They were conducted in a completely randomized design, with 4 post-harvest processes, 2 types of drying (with or without tillage) and 3 replications, totaling 24 plots. Natural green and natural parchment coffees were more responsive in the final scores, when not stirred during the drying process in the yard, unlike the coffees obtained by wet processing. Peeled coffees obtained the highest scores for the attributes, regardless of the adoption or not of stirring during the drying process in the yard. It was possible to obtain scores above 80 points by the SCA protocol, without stirring the coffee in the yard.</p>

-The aim of this study was to evaluate different organic substrates and phosphorus doses on the growth and leaf content of nitrogen, phosphorus and potassium in rootstocks of Tamarindus ). The experiment was conducted in a randomized block design (RBD), with 12 treatments (substrates), four replications and 10 plants per plot, totaling 480 plants. The goat manure and the organic compound were the most suitable treatments for the production of rootstocks of the tamarind tree. The maximum dose of 7.5 g kg -1 of simple superphosphate caused the highest levels of phosphorus and potassium in the dry mass of shoots. The nutrients in the dry matter of shoots accumulated in the following order: N > K > P.