Rendimiento de achicoria ‘Folha larga’ y ‘Pão de açúcar’ en función de la densidad de plantación

1 recurso en línea (páginas 322-328) : ilustraciones color.La densidad de planta influye directamente en el potencial productivo de los cultivos y la mejor puede no ser la misma para todos. Debido a la falta de investigación en esta línea con achicoria, con el objetivo de estudiar el efecto de la densidad de plantas sobre el rendimiento de los dos cultivares de achicoria, de Folha Larga y Pão de Açúcar. Se evaluaron siete densidades de plantas (444.444, 370.370, 333.333, 277.778, 266.667, 222.222 y 185.185 plantas/ha), en un diseño de bloques al azar con cuatro repeticiones. Se evaluaron el peso fresco, altura de planta, número de hojas y la rendimiento. A pesar de la densidad no influyó en altura de la planta, había una disminución en el peso fresco y el número de hojas por planta y hubo un aumento de la rendimiento de los dos cultivares de mayor densidad.Plant density directly influences the productive potential of crops, and the best density is not the same for all cultivars. Because of a lack of research in this area with chicory, this study aimed to evaluate the effect of plant density on the production of two chicory cultivares, Folha Larga and Pão de Açúcar. Seven planting densities were evaluated (444,444; 370,370; 333,333; 277,778; 266,667; 222,222 and 185,185 plants/ha); the experiment design used a randomized block design with four replications. The fresh weight, plant height, leaf number and yield were evaluated. Despite the fact that density did not influence plant height, mass reduction was observed in the fresh weight and number of leaves per plant and there was an increase in yield of both cultivars with the higher density.Bibliografía: páginas 327-328

Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

International audienceThe shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora