The variables related to the agro-industrial quality in sugarcane considered as main tools are being used by producers to choose the varieties to be planted. In general, cultivars that present a better industrial yield for the manufacture of sugar and alcohol have great importance promoting crop sustainability. In this research, the objective was to evaluate the industrial quality of four sugarcane varieties during plant-cane, first and second ratoon crops. The experimental design was a randomized block, with four treatments and five replications. The varieties studied were RB867515, RB92579, SP813250 and VAT90212. In first and second ratoon cycles, the industrial quality of the four varieties was evaluated by determining the fiber content, apparent sucrose (Pol), purity, soluble solids (Brix) and total recoverable sugars (TRS). The results showed that varieties RB867515, RB92579, SP813250 and VAT90212 were similar for agro-industrial quality. In first ratoon crop, only fiber was same between varieties. The RB867515 evidenced larger soluble solids and recoverable sugars. In second ratoon crop, the RB92579 evidenced larger apparent sucrose (Pol) and soluble solids (Brix) and total recoverable sugars (TRS).

RESUMO:Objetivou-se com este trabalho avaliar o melhor tipo de bandeja e substrato a ser utilizado no processo de produção de mudas de alface. O experimento foi conduzido em casa de vegetação da UFRPE. O delineamento experimental foi em blocos casualizados em arranjo fatorial de 2 x 5 com 4 repetições. Os tratamentos consistiram de dois tipos de bandejas (polietileno e poliestireno), cinco tipos de substratos (comercial Baseplant 100%; Húmus 50% + Areia 50%; substrato comercial Baseplant 33% + Húmus 33% + Areia 33%; substrato comercial Baseplant 50% + Húmus 50% e substrato comercial Baseplant 50% + Areia 50%). O número de folhas foi influenciado pelo tipo de substrato, com destaque para os substratos húmus 50% + areia 50% e comercial Baseplant 50% + areia 50%, quanto a bandeja, a do tipo poliestireno proporcionou os melhores resultados para as variáveis estudadas com exceção do comprimento da parte aérea. Palavras chave: Lactuca sativa L, produção, plântulas. FORMATION OF LETTUCE SEEDLINGS IN DIFFERENT TRAYS AND SUBSTRATES ABSTRACT:The objective of this study was to evaluate the best type of tray and substrate to be used in lettuce seedlings production process. The experiment was conducted in the UFRPE greenhouse. The experimental design was a randomized block in factorial arrangement of 2 x 5 with 4 repetitions. The treatments consisted of two types of trays (polyethylene and polystyrene), five types of substrates (trade Baseplant 100%, humus 50% + sand 50%; commercial substrate Baseplant 33% + Humus 33% + sand 33%; commercial substrate Baseplant 50 % humus + 50% and commercial substrate Baseplant + 50% Sand 50%). The number of leaves was influenced by the type of substrate, especially the 50% humus + sand 50% and commercial Baseplant 50% + sand 50%, as the tray, the polystyrene type provided the best results for the variables with except for the shoot length. Keywords Lactuca sativa L; production; seedlings. IntroduçãoA alface (Lactuca sativa L.) constitui uma das hortaliças mais cultivadas no Brasil, isso por ser uma das mais consumidas pelos brasileiros e apresentar características de boa adaptação, além de, requerer pequenas áreas para produção. É uma cultura de grande

No abstract

Nowadays, the search for increase in the crop productivity with high organoleptic, physical and physiological quality of seeds remains one of the main objectives. Considering the importance of peanuts (Arachis hypogaea L.) for Brazilian agriculture and for the production of seeds, it is indispensable to use technological innovations aiming at the advancement of productivity and profitability for the seed producer. This study aimed to evaluate the yield and the components of peanut seed production of cultivar BR1, subjected to the foliar and seed application of Ca + B, Mo + P and Stimulate®. The design was randomized blocks with the use of three products (Ca + B, Mo + P, Stimulate ®), two types of applications (via foliar and seed), the PK culture, and the absolute control, following a factorial scheme of [(3 × 2) + 2]. The doses of 2.0 mL/kg (Ca + B), 1.6 mL/kg (Mo + P), and 15 mL/kg (Stimulate ®) via seeds were indicated the best for the development of the peanut crop due to its profitability and efficiency. The application of Ca + B, Mo + P, and Stimulate ® via seeds is beneficial for the initial counting, emergence, emergence speed index, biological productivity, pod production, seed production and leaf area.

The greater use of crop fields by increasing plant population is an alternative to minimize losses to the farmers who use crop intercropped provides other benefits such as lower incidence of diseases and pests, and better exploitation and enrichment agroecosystem. The objective of this study was to evaluate the effect of the population of peanuts with and without inoculation and intercropping with forage palm on growth, productivity and biomass peanut. The treatments consisted of different populations of peanut (one, two and three rows of peanut row spacing of two meters of cactus pear), with and without inoculant, analyzed in subdivided plot scheme (3 × 2), totalizing six treatments in a randomized block design with four replications. The variables evaluated were plant height, number of branches, shoot dry mass and root nodule number, nodule dry weight, biomass productivity and legumes. The largest population of plants in number of lines of peanut intercropped with forage cactus promotes greater total biomass production and yield of beans and does not alter the height, branch number, dry mass of aerial part roots and nodules. The inoculant application did not result in to increased productivity biomass and growth of peanut plants, their use is not indicated. The planting of a row of peanuts between the rows of palm is not economically recommended.