Analysis of growth and nutrient accumulation in shoot of physic nut plants under two edaphoclimatic conditions of Minas Gerais State

?rea de concentra??o: Produ??o vegetal.Os resultados de pesquisa para o pinh?o-manso ainda s?o incipientes, principalmente no que diz respeito ?s suas demandas nutricionais e ?s recomenda??es de aduba??o. Neste contexto, objetivou-se com esse trabalho avaliar o crescimento e ac?mulo de nutrientes na parte a?rea do pinh?o-manso (Jatropha curcas L.) em dois locais de Minas Gerais. Os experimentos independentes seguiram os mesmos procedimentos, no per?odo de maio de 2010 a mar?o de 2013 e em locais distintos caracterizados a seguir: Latossolo Vermelho distr?fico no munic?pio de Curvelo, MG e o outro, em Neossolo Quartzar?nico ?rtico t?pico no munic?pio de Diamantina, MG. Os experimentos foram conduzidos em delineamento experimental em blocos casualizados com tr?s repeti??es, sendo os tratamentos as ?pocas de avalia??o das plantas de pinh?o-manso para ambos os experimentos. As ?pocas de coletas foram de aproximadamente a cada 30 dias a partir do plantio das mudas no campo num per?odo de 1.036 dias que corresponderam a 36 avalia??es. Foram avaliadas a massa seca de folhas, de caule, de frutos e parte a?rea em plantas de pinh?o-manso em cada ?poca de avalia??o, e a partir desses dados foram avaliados os par?metros de crescimento: taxa de crescimento relativo (TCR), taxa de crescimento absoluto (TCA), taxa de crescimento acumulado da cultura (TCAC) e efici?ncia fotossint?tica (EF). Foi feita a correla??o entre as vari?veis clim?ticas e a produ??o de massa seca na parte a?rea. Ap?s as avalia??es de crescimento, as amostras foram preparadas e submetidas ?s an?lises qu?micas do material vegetal dos teores de nutrientes. De acordo com os resultados, pode-se concluir que o crescimento e ac?mulo de nutrientes do pinh?o-manso foram mais acentuados nas condi??es edafoclim?ticas de Curvelo do que em Diamantina. Os par?metros de crescimento TCR, TCA, TCAC e EF s?o ?ndices morfofisiol?gicos importantes que representam e auxiliam o esclarecimento da din?mica do ac?mulo de mat?ria seca pelas plantas de pinh?o-manso. A temperatura ? a vari?vel clim?tica que apresenta uma maior correla??o com a produ??o de massa seca na parte a?rea de plantas de pinh?o-manso. A sequ?ncia de extra??o para os macronutrientes foi: K>Ca>N>P>S>Mg para Diamantina e N>Ca>K>P>Mg>S para Curvelo, e para os micronutrientes a ordem foi: Mn>B>Fe>Zn>Cu para Diamantina e Mn>Fe>B>Zn>Cu para Curvelo na parte a?rea aos 1.036 dias ap?s o plantio das mudas de pinh?o-manso no campo.Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017.The results of research for physic nut are still incipient, especially with regarding their nutritional demands and fertilization recommendations. In this context, the objective of this work was to evaluate the growth and accumulation of nutrients in shoot of Physic nut (Jatropha curcas L.) at two sites in Minas Gerais. The independent experiments followed the same procedures, from May 2010 to March 2013 and in distinct places characterized as: Dystrophic Red Latosol in the municipality of Curvelo, MG and the other, in typical Quartzarenic Neosoil in the municipality of Diamantina, MG. The experiments were conducted in a randomized blocks designed with three replicates, with the treatments being the evaluation times of the physic nut plants for both experiments. The collection times were approximately every 30 days from the planting of the seedlings in the field during a period of 1,036 days corresponding to 36 evaluations. The dry matter of leaves, stem, fruits and shoot were evaluated in physic nut plants at each evaluation period, and from these data the growth parameters were evaluated: relative growth rate (TCR), absolute growth rate (TCA), crop cumulative growth rate (TCAC) and photosynthetic efficiency (EF). The correlation between the climatic variables and the dry matter production in shoot was made. After the growth evaluations, the samples were prepared and submitted to the chemical analyzes of the nutrient contents of the plant material. According to the results, it can be concluded that the growth and nutrient accumulation of the physic nut were more accentuated in the edaphoclimatic conditions of Curvelo than in Diamantina. The growth parameters TCR, TCA, TCAC and EF are important morphophysiological indexes that represent and help to clarify the dynamics of the accumulation of dry matter by physic nuThe temperature is the climatic variable that presents a greater correlation with the dry matter production in shoot of physic nut plants. The extraction sequence for macronutrients was: K> Ca> N> P> S> Mg for Diamantina and N> Ca> K> P> Mg> S for Curvelo, and for micronutrients the order was: Mn> B> Fe > Zn> Cu for Diamantina and Mn> Fe> B> Zn> Cu for Curvelo in the shoot at 1,036 days after the planting of the physic nut seedlings in the field