Carlos Rogério Mauch

Potencial fisiológico de sementes de mogango e desempenho das plantas no campo

O objetivo desse estudo foi comparar a eficiencia de diferentes testes de vigor na avaliacao da qualidade fisiologica em sementes de mogango, relacionando os resultados obtidos em laboratorio com o desempenho das plantas no campo. Os lotes foram avaliados pelos testes de germinacao, primeira contagem, envelhecimento acelerado tradicional e com uso de solucao salina nao saturada de NaCl, (ambos a 41oC/48 e 72h) e comparados com a emergencia e o desenvolvimento inicial das plantas no campo. As plantas foram avaliadas aos quinze, vinte cinco e trinta e cinco dias apos a semeadura. Foram determinados o comprimento de parte aerea e de raiz, numero de folhas e massa seca de planta. O delineamento experimental foi inteiramente casualizado, utilizando-se quatro tratamentos (lotes) com quatro repeticoes. Conclui-se que o teste de envelhecimento acelerado tradicional por 72h permitiu classificar os lotes em diferentes niveis de vigor, e e o mais adequado para avaliacao do potencial fisiologico de sementes de mogango. Diferencas acentuadas quanto de vigor entre lotes de sementes de mogango influenciaram o desempenho inicial da cultura, especialmente o comprimento da parte aerea e a materia seca da planta.

RESPOSTA DE CULTIVARES DE BATATA A NÍVEIS DE INFESTAÇÃO DE LARVA-ALFINETE

A cultura da batata e considerada uma das mais importantes do mundo, superada em producao, apenas pelo trigo, milho e arroz. O cultivo da batata sofre com problemas fitossanitarios decorrentes do ataque de insetos, com destaque para a Diabrotica speciosa (Germar 1824) (Coleoptera: Chrysomelidae), cujas injurias por suas larvas causam consideraveis danos aos tuberculos. Assim, o objetivo desse trabalho foi avaliar a producao de tuberculos de duas cultivares de batata quando as plantas foram infestadas com diferentes densidades larvais de D. speciosa em diferentes epocas de desenvolvimento das plantas em casa de vegetacao, nas safras de verao e outono. Plantas das cultivares, Agata e BRS Clara, foram infestadas com 0, 5, 15, 30 e 40 larvas/planta, aos 14, 30, 40 e 50 dias apos a emergencia (DAE) das plantas. O numero de cinco larvas agrava o indice de ataque aos tuberculos de ambas as cultivares, no verao, periodo favoravel para o desenvolvimento do inseto.

Growth and conversion of solar energy of grafted tomato plants under protected cultivation

The grafting technique favors cultivation tomato under conditions environment adverse, being the effects on the physiology of scarce plants. Thus, this study aimed to evaluate the growth and solar energy conversion efficiency in grafted tomato and not grafted in greenhouse. The grafting was performed by grafting of cleft and the treatments consisted of tomato plants grafted on hybrid Kaguemusha® and not grafted. The samples for growth analysis were performed at intervals of fourteen days after transplanting (DAT) by the end of the crop cycle. At each harvest, plants were separated into organs, being determined to total dry matter (Wt), rates of dry matter production (Ct) and relative growth (Rw), net assimilation (Ea), leaf area index (L), growth rate, leaf area (Ca), relative growth of leaf area (Ra), leaf area ratio (Fa), leaf weight (Fw), specific leaf area (Sa), conversion efficiency solar energy (?) and assimilation rate of fruit (Efr). From the analysis of data growth, the plants grafted on the hybrid Kaguemusha® had higher Wt, Ct, Rw, Ea and ? compared to non-grafted that showed a high Fa and Fw. Therefore, the stress caused by grafting did not affect the growth at the end of the development cycle of tomato plants, being important feature to keep the crop yield.

Partição de Assimilados e Biometria de Duas Cultivares de Pimenta em Ambiente Protegido

The study aimed to comparatively evaluate the partition of assimilates between biometrics and two cultivars of pepper over the crop cycle. Plants were collected from the fourteenth day after transplanting (DAT) at regular intervals of fourteen days after the transplant by the end of the crop cycle. Evaluations were made of dry leaves (W f ), stem (W C ), root (W R ), fruit (W FR ) and the rate of dry matter production of leaves (C f ), stem (C C ), root (C r ), fruit (C FR ), number of leaves and plant height. The cultivar Vulcao presented a higher allocation of dry matter in leaf, stem and root, but the Doce gave a higher dry matter accumulation in fruit which is the part of commercial interest.

Yield and qualitative characteristics of grafted tomato

The objective of this study was to evaluate the productivity, classification and postharvest quality of fruits of tomato plants (cv. Gaucho) and the grafting of these plants with hybrid tomato plants (cv. Kaguemusha) by the terminal stake method. Plants were grown in a greenhouse in the municipality of Pelotas, state of Rio Grande do Sul (RS) using a complete randomized block design with 20 replications. Grafted tomato plants produced fruits with higher average weight (g) and total phenols when compared to non-grafted plants. Produtividade e características qualitativas do tomateiro submetidas à enxertia** Yield and qualitative characteristics of grafted tomato Tiago Pedó1* Tiago Zanatta Aumonde1 Leandro da Conceição Oliveira2 Leonardo Nora1 Carlos Rogério Mauch1 1Universidade Federal de Pelotas – UFPel, Campus Universitário, 96010-900, Pelotas, RS, Brasil 2Instituto Federal Sul-rio-grandense – IFSul, Av. Ildefonso Simões Lopes, 2791, Bairro Arco-íris, Campus Pelotas-Visconde da Graça, 96060-290, Pelotas, RS, Brasil **Parte integrante da Dissertação de Mestrado do primeiro autor. Mestrado financiado pelo CNPq. Autor Correspondente: *E-mail: tiago.pedo@gmail.com PALAVRAS-CHAVE Solanum lycopersicum L. Distribuição Produção Pós-colheitaThe objective of this work was to evaluate the productivity, classification and postharvest quality of fruits of tomato plants (cv. Gaucho), and graft these plants with plants of tomato hybrid (cv. Kaguemusha), by the method of terminal stake. Plants were grown in a greenhouse in the city of Pelotas, using randomized complete block design with 20 replications. Grafted tomato plants resulted fruits with highest average mass (g) and total phenols, compared to non-grafted.

O trabalho cooperativo e a agricultura familiar de base ecológica: atuações para um desenvolvimento sustentável a partir da realidade local

This study aimed to characterize the associated farmers to Cooperativa Sul Ecologica de Agricultores Familiares Ltda., and to understand the organization of the cooperative institution. For this, we conducted semi-structured interviews with the family farmers ecological base and development agents along Cooperative, together the use of secondary sources. Since the Cooperative presents their work ethics and press for horizontal beginning, it allows collective decision making. In addition, your audience - family farmers ecological base - has an active history of sustainable and cooperative work. Therefore, we can measure both the public research on the family farm as the institution Cooperativa Sul Ecologica actual actions and what Costabeber & Caporal established as ecologically based agriculture.

Caracterização cromossômica de Anthurium gaudichaudianum (Araceae), uma espécie nativa do Brasil

The karyotype of Anthurium gaudichaudianum Kunth, a species belonging to the Araceae family, is described for the first time. The species is native to Brazil, occurring from the state of Rio Grande do Sul to the state of Sao Paulo, and the specimens examined were collected from Brazilian Atlantic Forest, in the woods of the municipalities of Torres and Peruibe, located in the states of Rio Grande do Sul, and Sao Paulo, Brazil, respectively. Anthurium gaudichaudianum has 2n = 2x = 30 and its karyotype is formed by three pairs of metacentric chromosomes, nine pairs of submetacentric chromosomes and three pairs of acrocentric chromosomes, one of them with satellites (6 m + 18 sm + 6 a). The size of the chromosomes vary from nearly 6.0 to 2.8 μm. The complement of 30 chromosomes for A. gaudichaudianum found in our study is in accordance with the findings of 2n number for most of species in this large genus.