RESUMO Analisou-se, neste trabalho, o crescimento inicial do baru em solução nutritiva com omissão individualizada dos nutrientes minerais em casa de vegetação. O delineamento experimental utilizado foi o inteiramente casualizado com 13 tratamentos e quatro repetições, sendo: Solução Hoagland & Arnon completa e omissões individualizadas de N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, Mo e Zn. Avaliaram-se, aos 60 dias após, a instalação do experimento, características morfológicas: altura, diâmetro do coleto, número de folhas e de folíolos. Foram calculados o índice de Dickson e a relação da massa seca da raiz/massa seca da parte aérea. A massa seca das raízes e da parte aérea foi determinada e analisados os teores e acúmulo de nutrientes na parte aérea das mudas. Realizou-se a análise de variância dos dados coletados por meio do programa computacional Sisvar. O crescimento de mudas de baru, com exceção da variável altura, foi influenciado pela omissão de nutrientes na solução nutritiva sendo os principais nutrientes limitantes o K, Ca, Mg, Fe, Mn e Mo. A absorção dos nutrientes pelo baru ocorre de forma diferenciada em função das omissões nutricionais individualizadas aplicadas à solução de cultivo.

ABSTRACT This study analyzed the initial growth of baru in nutrient solutions with individualized omission of mineral nutrients in greenhouse. The experimental design was completely randomized with 13 treatments and four replicates: Complete Hoagland & Arnon solution and with individualized omissions of N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, Mo and Zn. At 60 days the following morphological characteristics were evaluated: height, root collar diameter, number of leaves and number of leaflets. In addition, the Dickson quality index and root/shoot ratio were calculated and root dry matter, shoot dry matter and the contents and accumulations of nutrients in the shoots of the seedlings were analyzed. Analysis of variance of the collected data was performed using the computational program Sisvar. The growth of baru seedlings, except for the variable height, was influenced by the omission of nutrients in the nutrient solution and the main limiting nutrients are K, Ca, Mg, Fe, Mn, and Mo. The absorption of nutrients by baru plants occurs differently under the individualized nutritional omissions applied to the nutrient solution.

Este trabalho foi realizado com o objetivo de testar substratos obtidos a partir da combinação de um composto orgânico oriundo de resíduos do processo de fabricação de celulose, com um substrato base de controle. O estudo foi realizado no viveiro florestal da Universidade Federal de Lavras utilizando-se sementes do híbrido Eucalyptus “urograndis”. Foram testados seis tratamentos com doses crescentes de composto orgânico. O experimento foi implantado em delineamento inteiramente casualizado, com seis tratamentos, cinco repetições e 30 mudas por parcela. A avaliação dos substratos foi mensurada através da análise do crescimento das plantas, ao longo do tempo e de sua qualidade, ao final do processo de produção. Quanto às análises de crescimento e à qualidade das mudas, os tratamentos que continham 60 e 80% de composto orgânico apresentaram as melhores respostas. Concluiu-se que a produção de mudas de Eucalyptus “urograndis” com os substratos testados mostrou-se tecnicamente viável de acordo com as características e os índices analisados.

This work was performed aiming to test substrates obtained from the combination of an organic compound, derived from waste of manufacturing process of cellulose, with a base substrate for control. The study was conducted at the Forest Nursery of the Federal University of Lavras using seeds of the hybrid Eucalyptus “urograndis”. Six treatments with increasing doses of organic compound were tested. The experiment was implemented in a completely randomized design, with six treatments, five replications and 30 seedlings per plot. The substrate evaluation was measured through the analysis of plant growth throughout the experiment and the seedlings qualities at the end of production process. As for the analysis of growth and quality of seedlings, the treatments with 60 and 80% of organic compound presented the bests response. It was concluded that the seedling production of Eucalyptus “urograndis” with the substrates analysed proved technically feasiable according to the analysed characteristics and indexes.

Planet transformations caused by human intervention in the last 200 years are largely due to chemical impact. Therefore, this study aimed to identify and analyze the environmental perception of undergraduate students and lecturers in the Chemistry course of the Federal University of Lavras, accounting for the topics "Environmental Definition" and "Relationship between Chemistry and Environment". Two thematic axes for discussion were proposed using theories of Social Representation and Environmental Complexity, with the aim of stimulating the conservationist reasoning and actions. Such axes were proposed to give support to the education of chemists at the undergraduate level.