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Melhoramento da mamoneira (Ricinus communis L.) I: plano geral dos trabalhos em execu??o nas sec??es de genética e plantas oleaginosas do instituto agron?mico do estado de S?o Paulo
Krug, C. A.;Mendes, P. Teixeira;
Bragantia , 1942, DOI: 10.1590/S0006-87051942000500001
Abstract: in the introduction to this article data are presented to show the growing economic importance of the cultivation of ricinus in brasil and particularly in the state of s?o paulo. following general statements regarding the botany, the origin and the geographic distribution of this genus, the investigations are outlined which are carried out by the divisions of genetics and oil plants of the instituto agron?mico of the state of s?o paulo, brasil, to improve this important crop plant. summarising, these investigations deal with the following subjects : a) organisation of a large collection of types ; b) investigations concerning the variability of the genus ricinus c) genetic analysis; d) regional variety trials ; e) improvement of the best varieties by individual selection and progeny trials ; f) regional strain tests ; g) breeding of improved varieties through hybridisation. in spite of the fact that these investigations have only been carried out for a few years, they are already furnishing results of economic importance, as seeds of superior varieties are already on sale to the farmers.
Melhoramento da mamoneira (Ricinus communis, L.). VIII - Oitava e nona séries de ensaios de linhagens
Canecchio Filho, Vicente;
Bragantia , 1958, DOI: 10.1590/S0006-87051958000100024
Abstract: the results of the eighth and ninth series of experiments with strains of the varieties n.° 38 and backer 374, carried out from 1951 to 1956, in two experiment stations of the instituto agron?mico de campinas are presented. these two series comprise six experiments, one in ribeir?o prêto and five in campinas. in the eighth series the strains 1220, 24, and 881 yielded more than the check variety n.° 38. it was noted that the strains 374-2 and 374-21, in the ninth series yielded more than the check varieties numbers 374 and 372.
Melhoramento da mamoneira (Ricinus communis, L.). V- quarta série de ensaios de variedades an?s - 1953/1954
Canecchio Filho, Vicente;Tella, Romeu de;
Bragantia , 1958, DOI: 10.1590/S0006-87051958000100006
Abstract: six castor bean varieties of the dwarf type, five from the usa and one from brazil, were compared at four localities of the state of s?o paulo (campinas, jahú, ribeir?o prêto, and pindorama), covering different soil and climatic conditions. the variety ia-38 (dwarf 38), the most planted in the state of s?o paulo, ranked first in production. the highest yields were obtained on sandy soils. soils of the mixed red type also gave good yields, but soils of the red and massapê types, which were already rather exhausted by cropping, gave poor yields.
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.
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