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Search Results: 1 - 10 of 2528 matches for " Gentil Godoy;Bovi "
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Temporary storage of jussara palm seeds: effects of time, temperature and pulp on germination and vigor
Martins, Cibele C.;Bovi, Marilene L. A.;Nakagawa, Jo?o;Godoy Júnior, Gentil;
Horticultura Brasileira , 2004, DOI: 10.1590/S0102-05362004000200021
Abstract: seeds of jussara palm (euterpe edulis mart.) are recalcitrant, presenting low longevity, high sensitivity to dehydration and to low temperatures of storage. temperature conditions for temporary preservation of those seeds, with and without pulp, were studied. mature fruits were harvested from 24 plants belonging to the palm collection of the instituto agron?mico (iac) located at ubatuba, s?o paulo state, brazil, and taken in moisture-proof containers to the universidade estadual de s?o paulo, in botucatu, s?o paulo state. half of the fruits were shelled and the seeds stored, with and without pulp, in sealed plastic bags (20 μm thick) maintained in chambers with temperatures of 5; 10; 15 and 20-30oc. samples for the quality tests were taken at 0; 3; 6; 9 and 12 days after fruit harvest. seeds stored with pulp were immediately shelled before test installation. several characteristics were evaluated, especially seed water content, germination rate, seedling length and dry matter. there is a positive after-ripening effect on euterpe edulis seeds. a period of storage of 9 to 12 days, after fruit harvest and before sowing, favored germination and vigor of jussara seeds. these effects were higher in shelled seeds when compared to unshelled ones. short-term storage temperatures ranging from 5 to 20-30oc are equally adequate for the preservation of seeds without pulp, but should not exceed 20oc for those with pulp, since a decrease in germination and vigor, and an increase in rotted germinative button and dead seeds were observed at 20-30oc temperature.
Rela??es alométricas para estimativa da fitomassa aérea em pupunheira
Vega, Fernando Vinicio A.;Bovi, Marilene L. A.;Spiering, Sandra Heiden;Godoy Júnior, Gentil;
Horticultura Brasileira , 2004, DOI: 10.1590/S0102-05362004000100022
Abstract: biomass estimates based on allometric relationships have theoretical and practical application. these data are useful tools in growth analysis experiments and yield prediction. several equations were studied to define the best allometric fit to peach palm grown for heart-of-palm purpose. spineless peach palms (bactris gasipaes kunth), from putumayo landrace, were utilized. the experiment, in a 2 x 1 m planting density, was conducted at ubatuba, s?o paulo state, brazil. where 117 plants were selected, ranging from 0.22 to 5.04 m of main stem height, and from 2.23 to 27.06 cm of main stem diameter. direct growth measurements were taken before plant harvesting. harvested material was separated in different structural components and weighted before and after drying. regression analyses were performed and different equations were applied to data, having as independent variables the traits easily measured. peach palm biomass can be precisely estimated by allometric relationships. main stem height, measured from ground level until first leaf insertion, was the ideal trait to indirectly estimate biomass in peach palm commercial cultivation. the contribution of the affshots biomass to the total above ground biomass, from planting to first harvesting is very low and can be neglected.
Híbridos interespecíficos de palmiteiro (Euterpe oleracea x Euterpe edulis)
Bovi, Marilene Le?o Alves;Godoy Júnior, Gentil;Sáes, Luís Alberto;
Bragantia , 1987, DOI: 10.1590/S0006-87051987000200015
Abstract: the vegetative growth and yield of the euterpe oleracea x e. edulis hybrid palms were compared to the parental population under two different shading conditions. in both conditions hybrid palms were superior to the parents in growth and yield. the hybrids were vigorous, precocious and had tillering capacity. in spite of the hybrid heterogeneity, they appeared to offer a great potential for upgrading heart of palm planting material in s?o paulo state, brazil.
Melhoramento da cana-de-a?úcar: IV. Experimentos regionais com clones obtidos em 1969
Alvarez, Raphael;Pommer, Celso Valdevino;Bastos, Candido Ricardo;Brinholi, Osvaldo;Júnior, Gentil Godoy;Bovi, Virginio;
Bragantia , 1984, DOI: 10.1590/S0006-87051984000100013
Abstract: the best twenty five clones, obtained in a sugar cane breeding program of "instituto agron?mico de campinas" started in 1969, were evaluated in a series of three experiments carried out at sugar cane regions of sao paulo state, brazil. in 1977 started the field trials using as controls the following commercial varieties: iac51205, iac52-150, iac58-480, na56-79, and cb41-76. the experimental design used was a randomized complete block with four replications. three harvests were made consecutivelly in plant cane (18 months), first ratoon (12 months after), and second ratoon (12 months after). means of the three harvest were analyzed statistically and tukey's test procedure was used to test differences among treatment means. the cane yield results showed that clones 69-362 and 69-326 were not statistically different from the best control iac51-205, and clones 69-426, 69-425, 69-274, 69-84, 69-87 and 69-242 showed cane yield results equal to the second best control na56-79. clones 69-309, 69-242, 69-232 and 69-362 had an outstanding performance in sugar content; on the other hand, clones 69-238, 69-274, 69-218, 69-254, 69-190. 69-420 and 69-277 had sugar content similar to that of best control na56-79. considering sugar yield, clones 69-362, 69-242, and 69-274 were not statistically different from the two best controls iac51-205 and na56-79, besides the clone 69-426 that showed to be equal to na56-79, in this, characteristic. according to the results new varieties are presented: iac69-242, iac69-274, iac69-309, iac69-362, iac69-425 and iac69-426.
Lodo de esgoto e sistema radicular da pupunheira
Vega, Fernando Vinicio Armas;Bovi, Marilene Le?o Alves;Godoy Júnior, Gentil;Berton, Ronaldo Severiano;
Revista Brasileira de Ciência do Solo , 2005, DOI: 10.1590/S0100-06832005000200011
Abstract: the effects of sewage sludge doses on the root system of peach palm were studied in a field experiment, in randomized complete blocks, carried out in ubatuba, state of s?o paulo, brazil. the trial was set up in july 2001, with a density of 5,000 plants ha-1. the sewage sludge doses (79.7 % water content) were 0, 38, 76, and 152 t ha-1, which were equivalent to doses of 0, 100, 200, and 400 kg ha-1 of n. the treatments were applied in the planting furrow, and every plant was provided with k by a dose of 15 g potassium chloride. the root system was analyzed one year after planting using soil auger and digging of trenches and with the help of digital images. it was concluded that the root system of one-year old peach palm was concentrated in the upper soil layer (over 75 % in the 0-20 cm surface layer), and within a horizontal distance of 0.50 m from the palm trunk. the sewage sludge positively modified the soil density as well as the root density. there was an increment in root biomass proportional to the sludge doses, and there was a positive linear relationship between the root and shoot biomass. sludge doses equivalent to 200 and 400 kg ha-1 of n allowed the root system to explore deeper soil layers, as well as the development of more fine roots compared to the other treatments.
Respostas de crescimento da pupunheira à aduba??o NPK
Bovi, Marilene Le?o Alves;Godoy Jr., Gentil;Spiering, Sandra Heiden;
Scientia Agricola , 2002, DOI: 10.1590/S0103-90162002000100023
Abstract: palms have high nutrient demand. for this reason, the effects of npk fertilization on the initial growth of peach palm (bactris gasipaes kunth) were studied in a field experiment, from november 1990 to april 1993. the trial was set up on an allic, previously limed soil, in ubatuba, sp, brazil (23o27's, 45o04'w, 6 m asl; "cfa" climate). a fractional factorial experimental design (? of 43) was utilized, with two blocks, one replication, 24 inner plants per plot and double border rows. treatments were composed of four rates of nitrogen (0 to 400 kg n ha-1 year-1), phosphorus (0 to 200 kg p2o5 ha-1 year-1) and potassium (0 to 200 kg k2o ha-1 year-1), applied in stripes and divided in five annual applications. the fertilizers used were: calcium nitrate, triple super phosphate and potassium chloride. plants were cultivated in a 2 ′ 1 m array, and periodically evaluated in relation to diameter of main stem, number of offshoots and percentage of plants with offshoots. in this sandy and low fertility soil, peach palm growth responses in relation to n and k amendments were linear and positive. initial responses were observed three months after fertilizer application. no isolated effects of p fertilization, nor significant interactions among fertilizers were observed. maximum growth responses were reached with 400 kg n ha-1 year-1, 0 kg p2o5 ha-1 year-1 and 200 kg k2o ha-1 year-1.
Respostas de crescimento da pupunheira à aduba o NPK
Bovi Marilene Le?o Alves,Godoy Jr. Gentil,Spiering Sandra Heiden
Scientia Agricola , 2002,
Abstract: As palmeiras apresentam grande demanda por nutrientes. Por este motivo, o efeito da aduba o NPK no crescimento de pupunheiras (Bactris gasipaes Kunth) foi estudado durante 30 meses (11/90 a 04/93) em experimento conduzido a campo em solo Aluvial álico (corrigido por meio de calagem) em Ubatuba, SP (clima "Cfa"). Utilizou-se o delineamento de blocos ao acaso, com uma repeti o, em esquema fatorial fracionado ( de 43), com tratamentos dispostos em dois blocos, parcelas úteis de 24 plantas e bordaduras duplas ao redor. Foram testadas quatro doses de nitrogênio (0, 100, 200 e 400 kg ha-1 ano-1 de N), fósforo (0, 50, 100 e 200 kg ha-1 ano-1 de P2O5) e potássio (0, 50, 100 e 200 kg ha-1 ano-1 de K2O), aplicadas em faixa e divididas em cinco aplica es anuais, utilizando como fontes nitrocálcio, superfosfato triplo e cloreto de potássio. As plantas foram cultivadas no espa amento de 2 × 1 m, e avaliadas periodicamente quanto ao diametro da haste principal, número de perfilhos e porcentagem de plantas perfilhadas. Em solo arenoso e de baixa fertilidade, a pupunheira apresenta resposta linear, positiva e significativa de crescimento às aduba es com nitrogênio (N) e potássio (K) e ausência de resposta ao fósforo (P). As primeiras respostas significativas ocorreram três meses depois de iniciadas as aduba es diferenciadas. N o houve intera es significativas entre N, P e K. O crescimento máximo foi obtido com doses anuais de 400 kg de N, 0 kg de P2O5 e 200 kg de K2O por hectare.
Correla??es fenotípicas entre caracteres avaliados nos estádios juvenil e adulto de a?aizeiros
Bovi, Marilene Le?o Alves;Godoy Júnior, Gentil;Spiering, Sandra Heiden;Camargo, Sérgio Bueno de;
Bragantia , 1990, DOI: 10.1590/S0006-87051990000200012
Abstract: juvenile-mature correlation coefficients relating two vegetative traits of euterpe oleracea mart. are presented as an aid to early and indirect selection for heart of palm yield in breeding work with this palm. significant age to age correlation coefficients were found for almost all paired comparison for plant girth and tillering number, with increasing values overtime. this fact together with the expected gain obtained by selection practiced, especially over palm girth, suggest that indirect phenotypic selection on this palm could start as early as seventeen months, with greater probability of selecting superior genotypes after two years after planting.
Rela??o entre caracteres da planta e do palmito de a?aizeiros
Bovi, Marilene Le?o Alves;Godoy Júnior, Gentil;Spiering, Sandra Heiden;Camargo, Sérgio Bueno de;
Bragantia , 1990, DOI: 10.1590/S0006-87051990000100006
Abstract: three vegetative characters and palmito yield components of assai palms (euterpe oleracea mart.) were studied in an experiment at ubatuba, state of s?o paulo, brazil, in order to identify non-destructive traits that could be used to estimate yield in superior material evaluation and selection. partial correlation coefficients showed significancy for palm girth and the main palmito yield components (weight, diameter and lenght), but not with the edible portion of the stipe. no significant partial correlation coefficient were found between the number of leaves and palm weight, indicating that the simple correlation coefficient found before, between those traits, were inflated by palm girth. palm girth was, among the studied traits, the one that contributed the most for palmito yield as estimated by its weight and diameter. it accounts for over 65% of the variation in total heart of palm weight, 35% of its net weight and over 50% of its diameter. due to the facility to be measured, the palm girth, or its diameter, should be used for evaluation and selection of superior palms in plant breeding of field experiments.
Aplica??o de biossólido na implanta??o da cultura da pupunheira
Vega, Fernando Vinicio A.;Bovi, Marilene L.A.;Berton, Ronaldo Severiano;Godoy Junior, Gentil;Cembranelli, Matheus de A.R.;
Horticultura Brasileira , 2004, DOI: 10.1590/S0102-05362004000100028
Abstract: the effects of four doses of sewage sludge, applied in the planting furrow, on the aboveground biomass production of peach palm during the first year were evaluated. the experiment was carried out in ubatuba, s?o paulo state, brazil, in field conditions. four doses of biosolid (equivalent to 0; 100; 200 and 400 kg ha-1 of n) were studied in a complete block experimental design, with six replications. ten-month old seedlings from putumayo landrace were utilized, in a planting density of 5,000 plants ha-1. plant responses to biosolid doses were evaluated every month, by means of some traits directly correlated to peach palm growth and yield. aboveground biomass (fresh weight base) accumulation was estimated, based on plant height. statistical differences among doses were detected five months after planting, probably due to plant acclimation and nutrient assimilation. anticipation of heart-of-palm harvesting could be detected, with 15% of plants ready to be harvested when treated with the dose of 400 kg ha-1 of n. an increase occurred in the number of offshoots per plant and in the percentage of suckered plants per plot as a function of biosolid doses. one year after sludge application, in the maximum response treatment (400 kg ha-1 of n), was obtained 27 ton ha-1 of aboveground biomass, 3.3 offshoots per plant and 77% of palms with offshoots were obtained.
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