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Influência da Fertirriga o da Nitrogenada na Produtividade da Cultura da Mamoneira  [cached]
Albanise Barbosa Marinho,Levi Gon?alves Moreira,Thales Vinícius de Araújo Viana,André Henrique P. Albuquerque
Revista Brasileira de Agricultura Irrigada , 2010, DOI: 10.7127/rbai.v4n100024
Abstract: Dentre as oleaginosas utilizadas no Programa Brasileiro de Biodiesel (ProBiodiesel), a mamoneira destaca-se devido a alta adaptabilidade à condi es adversas do clima e à multiplicidade de aplica es industriais do seu óleo. O objetivo do presente trabalho foi avaliar os efeitos de doses crescentes de nitrogênio, aplicadas via fertirriga o, na cultura da mamoneira (Ricinus communis L.) cultivar IAC-Guarani. O experimento foi implantado em uma área experimental da Universidade Federal do Ceará, no município de Fortaleza (03o44’S, 38o33’W, 19,5 m). A semeadura foi feita em covas, a uma profundidade de 3 a 5cm, no espa amento de 1,0 x 1,0 m. A aduba o de funda o foi composta de micronutrientes (15 g de FTE BR-12) e de fósforo, na forma de MAP (1.740g). Os macronutrientes nitrogênio e potássio foram aplicados via fertirriga o, semanalmente. Durante o ciclo da cultura, as plantas foram irrigadas diariamente por sistema de irriga o de gotejamento, onde as laminas foram quantificadas a partir de 75% da evapora o medida no tanque classe “A” (ECA). O delineamento experimental foi em blocos ao acaso com cinco tratamentos: 0, 50, 100, 150, e 200% do nitrogênio recomendado na análise de solo e quatro repeti es. A aplica o das diferentes doses de nitrogênio via fertirriga o, influenciaram os fatores produtivos peso de 100 sementes dos racemos de 2a e 3a ordens e as produtividades do racemo de 3a ordem e produtividade total da mamoneira. A dose de nitrogênio estimada de 131% da recomendada pela análise de solo foi a que proporcionou a maior produtividade total.
Melhoramento da mamoneira(Ricinus communis L.) II: observa??es gerais sobre a variabilidade do gênero Ricinus
Krug, C. A.;Mendes, P. Teixeira;
Bragantia , 1942, DOI: 10.1590/S0006-87051942000500002
Abstract: ninety six varieties of ricinus communis, l. were studied as for their growth habit, height, length and number of internodes from the base of the plant to its first inflorescence, types of branching, color of branches and various characters of leaves, inflorescences, fruit clusters, fruits and seeds ; earliness ; yielding capacity and porcentage of oil in the seeds. the description of several of the quantitative characters is supplemented by numerical data, which are also presented graphically. the extreme variability of ricinus offers excellent opportunities not only for genetical studies but also for breeding new and better varieties for cultivation.
Escala diagramática para avalia??o de mofo cinzento (Amphobotrys ricini) da mamoneira (Ricinus communis L.)
Chagas, Haroldo Antunes;Basseto, Marco Antonio;Rosa, Daniel Dias;Zanotto, Maurício Dutra;Furtado, Edson Luiz;
Summa Phytopathologica , 2010, DOI: 10.1590/S0100-54052010000200011
Abstract: the aim of the present study was to develop a diagrammatic scale to assess gray mold caused by amphobotrys ricini in castor bean (ricinus communis l.). the experiment included 59 clusters, which were disinfected in solution of sodium hypochlorite to 2% for 30 seconds and distilled water and sterilized. then, they were packed in moistened foam trays which received 5mm mycelial discs, and were kept in a climatic chamber at 25o c and 80%. rh. the disease evolution was observed daily pictures of the clusters diseased. to determine the severity percentage of the bunches, infected and healthy fruits were counted, estimating thus the percentage of the injured area, and developing a diagrammatic scale with six severity levels. the adoption of the proposed scale, improved the accuracy (r2 = 0,94) "a" values were not significantly different from zero (0) and "b" values were not significantly different from one (1).
Meios de cultura no desenvolvimento de ápices caulinares de mamoneira (Ricinus communis L.) in vitro
Bertozzo, Fernanda;Machado, Isaac Stringueta;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000600018
Abstract: the research of the culture medium composition suitable for plant species and the type of explant to be used is the most significant factor in plant tissue culture. the culture of stem tips with plant donor recovery is a technique of great impact for the in vitro plant production, regeneration of virus-free plants, germoplasm conservation and genetic modification. the objective of this study was to evaluate culture media composition in vitro on direct organogenesis of the fca-unesp-pb population of castor bean (ricinus communis l.), from stem tips for clonal propagation of elite genotypes. four formulations were tested: basic ms (t1), modified ms 1 (t2), modified ms 2 (t3) and wpm (t4) in a completely randomized experimental design with 20 replicates pertreatment with 1stem tip/flask. the treatment t3was superior, and differed significantly from the other treatments, with 35% of stem tips developed, followed by 10% in t2. t1 and t4 showed no plant tissue differentiation. the results allowed to conclude that the balance of mineral salts and culture media evaluated especially the rate no3 / nh4 and the absence of feso4.7h2o showed nigh influence on the development of stem tips of castor bean.
Effect of the organic garbage and castor oil plant pie on of crop growth characteristics of mamoneira (ricinus communis l.)  [PDF]
Fabiana Xavier Costa,Napole?o Esberard de Macedo Beltr?o,Vera Lúcia Antunes de Lima,Edivan Silva Nunes Júnior
Engenharia Ambiental : Pesquisa e Tecnologia , 2009,
Abstract: The main goal of this work was to evaluate the growth and development of the castor oil plant (Ricinus communis L.) submitted to the organic manuring, with castor oil plant pie and composed of organic garbage. The experiment was led at greenhouse, from October 2005 to March 2006, at Embrapa Algod o, state of Paraiba. The treatments were constituted from the addition of castor oil plant pie to the soil in the levels of 1.0; 2.0; 3.0 and 4.0 t ha-1 and organic garbage in the levels of 11.2; 22.4; 33,6 and 44.8 t ha-1 compared with three witness: a) soil without addition of fertilizers; b) soil with the addition of NPK, in the concentration of 180, 64 and 52 kg ha-1 respectively; c) soil with addition of the following micronutrients: 1.0 kg B ha-1; 0.5 kg Cu ha-1; 1.0 kg Fe ha-1; 1.0 kg Mg ha-1 and 1.0 kg Zn ha-1, corresponding to 11 treatments. The experimental design was randomized blocks with four replication and the stem diameter, height plant and leaf were submitted to the variance and regression analysis. The castor oil plant pie and organic garbage reacted in a positive way in all the plant growth parameters studied, being denoted that they are effective for this crop.
Avalia??o da qualidade fisiológica de sementes de mamoneira (Ricinus communis L.) pelo teste de tetrazólio
Gaspar-Oliveira, Carolina Maria;Martins, Cibele Chalita;Nakagawa, Jo?o;
Revista Brasileira de Sementes , 2010, DOI: 10.1590/S0101-31222010000100021
Abstract: the object of this study was to establish parameters to evaluate the physiological quality of castor bean seeds (ricinus communis l.) using the the tetrazolium test. five seed lots were evaluated for viability and vigor by the tetrazolium test and the results compared with the germination test in sand, on paper, first count of the germination test on paper, seedling emergence in the field, emergence speed index, seedling vigor classification, seedling length and dry matter, and accelerated ageing. the statistical design was completely randomized and the comparison of means was by the tukey test at the 0.05 level of probability. the tetrazolium test viability results were correlated with the germination test in sand, with seedling emergence in the field and with seedling length, and tetrazolium vigor was correlated with seedling vigor classification. it was concluded that the parameters established are efficient for estimating castor bean seed viability and are promising for evaluating castor bean seed vigor using the tetrazolium test.
Eficiência da sele??o recorrente para redu??o da estatura de plantas em mamoneira (Ricinus communis L.)
Oliveira, Inocencio Junior de;Zanotto, Maurício Dutra;
Ciência e Agrotecnologia , 2008, DOI: 10.1590/S1413-70542008000400011
Abstract: the aim of this work was to evaluate the recurrent selection efficiency for reduction of stature of the castor bean plants of the guarani cultivar (ricinus communis l.), turning it with appropriate strucuture to facilitate the manual and/or mechanic harvest. four cycles of recurrent selection were accomplished through the utilization of self-pollinated progenies in the guarani cultivar for reduction of plants stature, in edaphclimatic conditions of s?o manuel-sp, botucatu-sp and penápolis-sp towns. the evaluations of plants stature and yield (kg.ha-1) of the four selection cycles and the original cycle (cycle 0) were accomplished in s?o manuel-sp, botucatu-sp and penápolis-sp, under a randomized block design with five repetitions and useful parcels of 30 m2. the analysis of variance for the characteristics plant stature and yield was made apart to each environment and together for the three environment and, afterwards one performed the average comparison by the tukey test using 5% of probability. one estimated for the three environments, by the regression analysis, the genetic gains of the four selection cycles for plant stature. one concluded that the recurrent selection was efficient to the reduction of plant stature and that guarani castor bean cultivar could create genetic variability for this characteristic and the yield was not influenced by the reduction of plants stature.
Método de preparo das sementes de mamoneira (Ricinus communis L.) para o teste de tetrazólio
Gaspar-Oliveira, Carolina Maria;Martins, Cibele Chalita;Nakagawa, Jo?o;
Revista Brasileira de Sementes , 2009, DOI: 10.1590/S0101-31222009000100018
Abstract: the tetrazolium test is a quick and accurate method for estimating seed viability and vigor. this research had the objective of standardizing the preparation methods for castor bean seeds (ricinus communis l.) to evaluate the physiological potential by the tetrazolium test. the evaluated seed preparation methods were: longitudinal cut through the middle of the seed coat, endosperm and embryo; longitudinal and diagonal cut without reaching the embryo; seed coat removal; seed coat removal with longitudinal cut through the middle of the endosperm and embryo; and seed coat removal with longitudinal cut parallel to the cotyledons through the middle of the endosperm and embryo. before carrying out the preparation methods, the seeds were preconditioned between moist paper towels for 18 hours at 30oc, and after preparation, the seeds were immersed in tetrazolium solution at 0.5% concentration and then placed in a dark chamber at 35oc for the staining development. the staining uniformity was evaluated after each preparation method by comparing the methods. it was concluded that the best seed preparation method was coat removal with a lengthwise longitudinal cut, through the middle of the endosperm and embryo.
Efeitos dos macronutrientes e do ferro no crescimento e composi??o química da mamoneira (Ricinus communis L.) cultivada em solu??es de nutrientes
Iturrieta Rojas, Aída;Neptune, A. M. Louis;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1971, DOI: 10.1590/S0071-12761971000100002
Abstract: this work was accomplished with the aim of studying the effects of macronutrients and iron on the growth and chemical composition of the castor bean (ricinus communis l.) cultivated in nutritive solution. castor bean seedlings were cultivated during 2 months in complete solution and afterwards were transferred to nutritive solutions with and without the presence of macronutrients and iron (micronutrient). after 2 months of cultivation in deficient solutions, symptoms of lack of n, p, k, ca, mg, s and fe were found and described in this work. as soon as symptoms of deficiency appeared, the plants were harvested and divided in the following fractions: root, old stem, (the portion marked at the time of application of the deficient solution), new stem (the portion grown above the mark), old petioles, new petioles, old leaves, new leaves and fruits. with respect to the development of the plants the following measurements were taken: height, stem diameter, length of central "lobulo" taken from the center of the leaf. each one of the fractions was also weighed. the n, p, k, ca, mg, s and fe macronutrients concentrations were determined from the old and new leaves and from the total plants. the quantities in mg of each one of these macronutrients absorved by the plant were calculated.
TIPOS DE ADUBA O SOBRE A TAXA DE CRESCIMENTO INICIAL DA MAMONEIRA
RODRIGUES, Wagner Nunes,NICOLINE, Henrique Otes,MARTINS, Lima Deleon,TOMAZ, Marcelo Antonio
Nucleus , 2011,
Abstract: Castor bean plant (Ricinus communis L.) is a demanding plant about nutrients, its fertilizationis still little studied in Brazil. The cultivation of castor bean plant exports from the area about 80 kg ha-1 N, 18 kgha-1 of P2O5 and 32 kg K2O ha-1 for every 2.000 kg ha-1 of produced soft. This study evaluated the effect ofdifferent sources of fertilizer (mineral, cattle manure, poultry manure and coffee straw) on the growth rate ofcastor bean plant. The experiment was conducted in a greenhouse at the Centro de Ciências Agrárias daUniversidade Federal do Espírito Santo (CCA/UFES) following a completely randomized design with split plotin time. The castor bean was grown for 84 days (12 weeks) and the growth parameters of plants were evaluated.The results show that the castor bean plant showed higher growth when subjected to organic fertilization withpoultry manure, reaching the highest averages for all variables, exceeding the average mineral fertilizer at theend of the evaluation period.A mamoneira (Ricinus communis L.) é uma planta exigente em nutrientes, sua aduba o ainda épouco estudada no Brasil. O cultivo da mamona exporta da área cerca de 80 kg ha-1 de N, 18 kg ha-1 de P2O5 e 32kg ha-1 de K2O para cada 2.000 kg ha-1 de baga produzida. Este trabalho buscou avaliar o efeito de diferentesfontes de adubo (mineral, esterco bovino, cama aviária e palha de café) na taxa de crescimento da mamoneira. Oexperimento foi desenvolvido em casa de vegeta o no Centro de Ciências Agrárias da Universidade Federal doEspírito Santo (CCA/UFES), seguindo delineamento inteiramente ao acaso, com esquema de parcelassubdivididas no tempo. A mamona foi cultivada e avaliada durante 84 dias (12 semanas), quanto a parametros decrescimento das plantas. Os resultados mostram que a mamoneira apresentou maior crescimento quandosubmetida à aduba o organica com cama aviária, atingindo as maiores médias
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