Consórcios com potencial de uso como adubo verde no município de Paty do Alferes-RJ.

Foi feito um experimento sob condições de campo no município de Paty do Alferes-RJ, com a finalidade de avaliar os efeitos dos consórcios, mucuna-preta (Mucuna aterrima) e crotalaria (Crotalaria juncea), consorciados com o milho (Zea mays cv. BR-116), na produção de fitomassa e acumulo de nitrogênio nas plantas dessas espécies e das plantas invasoras. O delineamento experimental foi O de blocos ao acaso, com quatro repetições e os três tratamentos: mucuna-preta + milho; crotalaria + milho e milho. A produção de fitomassa seca no tratamento só com milho foi significantemente (p<0,05) maior quando comparada com a produção do milho no consórcio, aproximadamente o dobro e nove vezes maior que nos consórcios com mucuna-preta e crotalaria respectivamente. No consórcio mucuna preta + milho, a leguminosa contribuiu com 61 % da produção da fitomassa seca, enquanto no consórcio crotalaria+ milho a contribuição foi de 89%. Não foi observado plantas invasoras nas parcelas do consorcio de mucuna-preta + milho. A fitomassa seca do milho nas parcelas sem consórcio apresentou um teor de N (0,69%) menor do que no milho consorciado com a crotalaria (1,36%) e com mucuna-preta (1,25%).0 teor de N da mucuna-preta (3,12%) no consórcio foi maior do que com a crotalaria (2,18%). A produção de N total do consórcio mucuna-preta + milho foi significantemente (p<0,05) maior 54 e 338% do que a do consórcio crotalaria + milho e do tratamento com milho, respectivamente, enquanto o tratamento crotalaria + milho superou o tratamento so com milho, em 185%. A produyao de N da mucuna-preta no consórcio foi 32% maior do que o da crotalaria. A mucuna-preta e a crotalaria no consórcio com o milho, num intervalo de 105 dias, do plantio até o corte, produziram cerca de 4,8 e 3,7 kg de N ha-1dia-1, respectivamente. Isto faz destas leguminosas um grande potencial para uso como adubo verde na região de Paty do Alferes-RJ. A field experiment was set up at the Municipality of Paty do Alferes, RJ, aiming the evaluation of intercropping the summer green manure velvet bean (Mucuna aterrima) and sunnhemp (Crotalaria juncea) with maize (Zea mays cv BR 116) on the biomass production and N accumulation in these species and in the weeds. The experimental design was in randomised blocks with four replications. The treatments were velvet bean + maize, sunnhemp + maize and maize. The dry mass production of the maize treatment was significantly higher (p<0.05) than maize intercropped with green manure. Maize only areas produced the double and nine-fold the dry mass accumulated by maize intercropped with velvet bean and sunnhemp, respectively. In the velvet bean maize intercrop the legume contributed to 61 % of total mass production while sunnhemp contributed to 89% of the total mass when intercropped with maize. There were no weeds in the plots with the intercrop of maize and velvet bean. The dry mass of maize in the pure maize plots had a N content (0.69%) lower than maize intercropped with sunnhemp (1.36%) and with velvet bean (1.25%). The N content in velvet bean (3.12%) was higher than that in sunnhemp (2.18%). The total N accumulated in the maize - velvet bean intercropping was 54% and 338% higher (p<0.05) than that accumulated in maize-sunnhemp intercropping and in pure maize crop, respectively, while the treatment maize-sunnhemp surpassed the pure maize treatment in 185%. The N production in velvet bean intercropped with maize was 32% higher than that in sunnhemp under the same condition. Velvet bean and sunnhemp intercropped with maize yielded respectively 4.8 and 3.7 kg N ha-1 day-1 during 105 days that comprised the planting-cut interval. This pointed out that these legumes have a strong potential to be used as green manure in the region of Paty do Alferes, RJ.Parceria: PESAGRO

X, Y and Z States

Many new states in the charmonium mass region were recently discovered by BaBar, Belle, CLEO-c, CDF, D0, BESIII, LHCb and CMS Collaborations. We use the QCD Sum Rule approach to study the possible structure of some of these states.Comment: Contribution for the proceedings of the "XII Quark Confinement and the Hadron Spectrum - CONF12" conferenc

DigitalPinDirector: A digital pinscreen editor for images and realtime animation in low cost personal computers

This paper presents the main characteristics of the traditional Pinscreen, the way it works, its problems and results achieved. The first Digital Pinscreen system is presented, along with its main characteristics and limitations. The rest of the paper describes and presents the DigitalPinDirector: a system that enables a full and true creative access to the unique visual and animation characteristics of the Pinscreen.info:eu-repo/semantics/publishedVersio

Adubação Verde na Produção Orgânica de Abacaxi na Chapada Diamantina, BA.

A prática da adubação verde promove benefícios ao solo, dentre estes, aumenta os teores de matéria orgânica, favorece a ciclagem de nutrientes e mantém a cobertura do solo. O presente trabalho objetivou avaliar a produção de biomassa vegetal e os estoques de carbono (C) e macronutrientes na matéria seca de diferentes espécies de adubos verdes utilizados em pré-plantio na cultura do abacaxi

Introdução de mudas de leguminosas arbóreas em pastagem de Brachiaria decumbens e B. brizantha.

En un Latossolo Vermelho-Amarelo, en Itatiaia-RJ, Brasil, se evaluaron el desarrollo y la sobrevivencia de plantas de las especies arbustivas siguientes, establecidas con y sin protección en pasturas de Brachiaria decumbens y B. brizantha en pastoreo: 1- Gliricidia (Gliricidia sepium), 2- Albizia (Pseudomanea guachapele), 3- Mulungu (Erythrina verna), 4- Jurema Preta (Mimosa tenuiflora), 5- Sabia (Mimosa caesalpiniifolia), 6- Angico Vermelho (Anadenanthera macrocarpa), 7- Olosericia (Acacia holosericea), 8- Acacia Auriculada (Acacia auriculiformis), 9- Jurema Branca (Mimosa anemisiana), 10- Orelha de Negro (Enterolobium contortisiliquum), 11- Guapuruvu (Schizolobium parahyba), 12- Mulungu do Alto (Erythrina poeppigiana), 13- Coração de Negro (Albizia lebbeck), 14- Leucena (Leucaena leucocephala), 15- Jacaranda Bico de Pato (Machaerium hirlum), 16- Canafistula (Peltophorum dubium). Los resultados mostraron que, Leucena y Gliricidia tuvieron um pobre desarrollo cuando fueron plantadas sin protección contra el consumo por los animales. Por el contrario, Jurema Preta mostro uma alta tolerância al dano por animales em pastoreo. The introduction of unprotected young plants of 16 leguminous tree species into Brachiaria decumbens and B. brizantha pastures under grazing was evaluated in four different moments of the year at the Itatiaia Municipality, RJ. Two variables related to plant height and number of sproutings were used for the evaluations. These variables were correlated (r= 0,92; p< 0.0001). The nil hypothesis was rejected by the four Manova tests, thus the results of this experiment were analysed by means of multidimensional variance analysis in order to better explore the combined information of the variables. The statistical difference of the means by the Scott-Knott test of the 64 treatments of the principal canonical variable, suggested the formation of four groups with the Jurema Preta (Mimosa tenuiflora) group standing out at the 4th evaluation. Difference among treatments means for each variable, calculated by Bonferroni confidence intervals, revealed that the greatest plant height and the highest number of sproutings were found for Jurema Preta. The results related to the variables with grazing obtained from Jurema Preta confirm its recommendation for the region as the tree legume with the highest chances of growth whether introduced into pastures under grazing without protection.Parceria: PESAGRO

Coherent States Expectation Values as Semiclassical Trajectories

We study the time evolution of the expectation value of the anharmonic oscillator coordinate in a coherent state as a toy model for understanding the semiclassical solutions in quantum field theory. By using the deformation quantization techniques, we show that the coherent state expectation value can be expanded in powers of $\hbar$ such that the zeroth-order term is a classical solution while the first-order correction is given as a phase-space Laplacian acting on the classical solution. This is then compared to the effective action solution for the one-dimensional \f^4 perturbative quantum field theory. We find an agreement up to the order \l\hbar, where \l is the coupling constant, while at the order \l^2 \hbar there is a disagreement. Hence the coherent state expectation values define an alternative semiclassical dynamics to that of the effective action. The coherent state semiclassical trajectories are exactly computable and they can coincide with the effective action trajectories in the case of two-dimensional integrable field theories.Comment: 20 pages, no figure