Paulo César Ferreira Linhares

Produção de beterraba fertilizada com jitirana em diferentes doses e tempos de incorporação ao solo

This study was conducted from July to November 2009, at Universidade Federal Rural do Semi-Arido (UFERSA), Mossoro, RN, Brazil, to assess the production of sugar beet (Beta vulgaris L.) fertilized with scarlet starglory (Merremia aegyptia L.) at different doses and times of soil incorporation. The experimental design was a randomized complete block with treatments arranged in a 4 x 4 + 1 factorial, with three replicates and 72 plants per plot, where the first factor consisted of the doses of scarlet starglory (5.4, 8.8, 12.2 and 15. 6 t ha-1 on dry basis), the second one by the times of soil incorporation (0, 10, 20, and 30 days after sowing - DAS), and additional treatment with 80 t ha-1 of cattle manure. The sugar beet cultivar grown was Early Wonder. The best productive performance for sugar beet was obtained in the dose of 15.6 t ha-1 of scarlet starglory incorporated into the soil at time 0 day. Economic indicators in the dose of scarlet starglory of 15.6 t ha-1 at time 0 day of its incorporation into the soil were higher than those obtained with the use of 80 t ha-1 of cattle manure. The cultivation of sugar beet is agro-economically viable with the use of scarlet starglory as green manure.

Quantidades e tempos de decomposição da jitirana no desempenho agronômico do coentro

The practice of green manuring promotes benefits to production systems of hortals. One experiment was carried out at experimental farm of Departament of plant Sciences, Federal Rural University of the Semi-Arid (UFERSA), Mossoro-RN, in the period from June to October 2009, with the aim of evaluating the agronomic performance of coriander under different amounts and decomposition times of and scarlet starglory incorporated into the soil. The experimental design was a randomized complete block with treatments arranged in a 4x4, with three replications, and 144 plants per plot, where the first factor consisted of the amounts of scarlet starglory (5.4, 8.8, 12.2 and 15.6Mg ha-1 dry matter), the second one by the times of soil incorporation (0, 10, 20, and 30 days before sowing - DAS). The cultivar planted of cilandro was Verdao. The characteristics evaluated in the cilandro were: plant height and number of stalks per plant, fresh mass and dry matter mass of shoots. Was significant interaction between for number stalks per plant. The best agronomic performance for cilantro was obtained in the dose of 15.6Mg ha-1 of scarlet starglory incorporated into the soil at time 30 days.

Desempenho agroeconômico da cenoura adubada com jitirana (Merremia aegyptia)

The use of spontaneous plants of the Caatinga biome as green manure is becoming a viable option for vegetable production in northeastern Brazil. Among these plants, the scarlet starglory is a spontaneous plant adapted to the climatic and soil conditions of the region, with high biomass production, rapid growth and low C/N ratio. We evaluated the agroeconomic performance of carrot (cv. Brasilia) depending on added amounts of scarlet starglory under the ground and of its moment of incorporation. The study was carried out in a rural area, in Mossoro, Rio Grande do Norte state, Brazil, from September to December 2009. The experimental design was randomized complete blocks with the treatments arranged in a factorial scheme (4x4) + 1, with three replications. The first factor was comprised of amounts of scarlet starglory placed between the carrot rows, in a depth of 15 cm (5.4, 8.8, 12.2 and 15.6 t ha-1 on a dry basis) and the second factor, of the incorporation moment of this material (0, 15, 30 and 45 days after sowing carrots). The additional treatment (control) was 40 t ha-1 of cattle manure applied 10 days before sowing. We evaluated the marketable and total yield of roots, percentage of the different classes of roots and the economic indicators of gross income, net income, rate of return and profit margin. No significant interaction between the amounts of scarlet starglory under the soil and the incorporation moment was determined in any of the characteristics examined for carrot. The best agroeconomic performance of carrot cropping was obtained by adding 15.6 t ha-1 of scarlet starglory to the soil. The optimization of this performance was achieved with the incorporation moment of 26 days after carrot sowing.

Qualidade fisiológica de sementes de coentro [Coriandrum sativum (L.)]

The quality quality of the seeds this related of direct form to it physiologic potential, acted by the germination and/or energy, expressing it capacity to originate normal plantules. The objective of the study was the analysis of the effects of the temperature and of the time of exhibition to the test of accelerated aging on the parameters: germination, germination in the first counting, emergency, Index of emergency speed, length of aerial part and mass dries. The rehearsal was driven in the delineamento entirely casualizado, with four repetitions. The seeds were submitted to two methods of accelerated aging: the traditional with distilled water and other with saturated solution of 40 g NaCl 100 mL-1 of water, in two temperatures (38 oC and 41 oC) and in three exhibition periods (48, 72 and 96 hours). Better the physiologic potential of the cilantro seeds can be verified, when submitted to the stressful conditions: in the temperature of 41 °C with the period of exhibition of 96 h (it Tests traditional aging) and in the temperature of 41 °C with period of exhibition of 48 h (with saturated solution). The germination tests and first counting evidenced differences in the quality physiologic initial of the seeds in function of the applied treatments.

Influência de partes vegetais de Tamarindus indica L. como efeito alelopático na germinação da alface

O presente trabalho teve como objetivo avaliar a existencia de substâncias capazes de interferir na germinacao de outras especies, e seu efeito sobre as sementes e plântulas de alface ( Lactuca sativa ). O experimento foi conduzido no laboratorio de analises de sementes do departamento de ciencias vegetais da Universidade Federal Rural do Semi-Arido, Mossoro – RN. O delineamento experimental utilizado foi inteiramente casualizado, em esquema fatorial 4 x 3 + 1, sendo o primeiro fator quatro concentracoes de extrato aquoso de tamarindo (0, 10, 25 e 50%) proveniente de tres partes distintas do vegetal (folha, cascas dos frutos maduro e casca do caule), com quatro repeticoes de 50 sementes. Os parâmetros avaliados foram a porcentagem de emergencia (E), primeira contagem de emergencia (PCE) e indice de velocidade de emergencia (IVE). Os resultados indicaram forte atividade alelopatica presente em todas as regioes estudadas do tamarindo sobre as variaveis analisadas no alface. Apenas a casca do fruto maduro na concentracao de 10% nao influenciou na emergencia, primeira contagem e indice de velocidade de emergencia, com valores na ordem de: 18%, 10% e 0,6, respectivamente .

Rendimento de coentro (Coriandrum sativum L. ) em sistema de adubação verde com a planta jitirana (Merremia aegyptia L. )

O coentro e a hortalica mais utilizada como condimento na regiao de Mossoro-RN. Um experimento foi conduzido na Fazenda Experimental Rafael Fernandes da Universidade Federal Rural do Semi-Arido - UFERSA, no periodo de maio a junho de 2010, com o objetivo de avaliar o rendimento de coentro sob diferentes quantidades da planta trepadeira jitirana, incorporada ao solo como adubo verde. O delineamento experimental usado foi o de blocos completos casualizados com sete tratamentos e tres repeticoes. Os tratamentos consistiram da incorporacao de sete quantidades de jitirana (3,0; 6,0; 9,0; 12,0; 15,0; 18,0 e 21,0 t ha-1 de materia seca de jitirana). A cultivar de coentro plantado foi a Verdao. As caracteristicas avaliadas foram: altura e numero de hastes por planta, rendimento e massa seca da parte aerea. O melhor desempenho agronomico do coentro foi observado na quantidade de 21,0 t ha-1 de jitirana. Para cada tonelada de jitirana incorporada ao solo observa-se um rendimento de coentro de 395 kg ha-1.

Eficiência econômica de cultivares de coentro consorciado com rabanete adubado com jitirana mais esterco bovino

Dentre as hortalicas cultivadas em sistema consorciado nas areas de producao familiar, encontra-se o coentro e o rabanete, especies de ciclo curto (de 30 a 35 dias para o coentro) e (de 25 a 30 dias para o rabanete). Essas especies sao cultivadas na regiao de Mossoro/RN em sistema orgânico de producao onde se utiliza esterco bovino como adubo. Assim, um experimento foi conduzido na Fazenda Experimental Rafael Fernandes, Mossoro-RN, no periodo de agosto a outubro de 2014, com o objetivo de avaliar a eficiencia economica de cultivares de coentro consorciado com rabanete adubado com jitirana mais esterco bovino. O trabalho foi conduzido no delineamento de blocos completos casualizados em esquema fatorial 2 x 5, com tres repeticoes. O primeiro fator foi constituido de duas cultivares de coentro (verdao e tabocas) consorciado com rabanete, cultivar Crimsom gigante e o segundo fator pelas doses de jitirana mais esterco bovino (0,0; 1,0; 2,0; 3,0 e 4,0 kg m- 2 de canteiro). Utilizou-se a proporcao de 1:1, ou seja, uma parte de jitirana para uma parte de esterco bovino. O espacamento utilizado para o rabanete foi de 0,10 x 0,10 m com uma planta por cova-1. Ja no coentro, o espacamento utilizado foi de 0,10 x 0,05 m com cinco plantas cova-1, correspondendo a 1000 plantas m- 2 de canteiro. As caracteristicas avaliadas para os indicadores economicos foram: renda bruta e renda liquida, taxa de retorno e indice de lucratividade. O melhor desempenho economico do sistema foi obtido na dose de 4,0 kg m- 2 de canteiro, com renda bruta de R

Avaliação biométrica de caracteres do melão de São Caetano (Momordica charantia L)

19.825,00, renda liquida de R

Períodos de incorporação da jitirana mais palha de carnaúba na produtividade de cenoura

16.519,00, taxa de retorno de R

Senna obtusifolia como adubo orgânico no cultivo da alface em sucessão a cultura do coentro

6,00 e indice de lucratividade de 78,7%. Economic efficiency of intercropping coriander and radish cultivars fertilized with manure bovine jitirana Abstract: Among the vegetables grown in intercropping system in the areas of family production, is the cilantro and radish, short-cycle species (30-35 days to coriander) and (25-30 days for radish). These species are grown in the region of Mossoro / RN in organic production system which uses cattle manure as fertilizer. Thus, an experiment was conducted at the Experimental Farm Rafael Fernandes, Mossoro-RN, in the period from August to October 2014, aiming to assess the economic efficiency of intercropping coriander and radish cultivars fertilized with manure jitirana beef. The work was conducted in a randomized complete block in a factorial 2 x 5, with three replications. The first factor consisted of two coriander cultivars (verdao and tabocas) intercropped with radish, cultivate Crimsom giant and the second factor by more jitirana doses of cattle manure (0.0, 1.0, 2.0, 3.0 and 4.0 kg m-2 site). We used the ratio of 1: 1, or a part of jitirana for a part of manure. The spacing used for the radish was 0.10 x 0.10 m with a plant per hill-1. You coriander, the spacing used was 0.10 x 0.05 m with five plants pit-1, corresponding to 1000 m 2 plants site. The characteristics evaluated for the economic indicators were gross income and net income, rate of return and profitability index. The better economic performance of the system was obtained at a dose of 4.0 kg m-2 site, with gross income of R