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Nutri??o mineral das hortali?as: LXXXVIII. Extra??o de nutrientes em alho-porró (Allium porrum)
Minami, Keigo;Haag, Henrique Paulo;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1991, DOI: 10.1590/S0071-12761991000100016
Abstract: an experient was carried out in order to determine the nutrients extraction by leek, in field condition. plant materials were collected, since 50 days after transplanting, in intervals of 20 days up to 170 days growth. the results showed that, in the end of the experiment, the dry matter weight was 12.87 g per plant: n and k levels were the highest levels in the shoot and root of the plants. the same occurred with fe in relations to micronutrients. the nutrients extraction by a population of 166.667 plants per ha occurred as follow: 115,36 kg of n, 7,88 kg of p, 55,16 kg of k, 13,14 kg of ca, 7,69 kg of mg, 7,10 kg of s, 38,89 g of b, 17,77 g of cu, 1165,49 g of fe, 52,09 g of mn and 47,15 g of zn.
Utiliza??o de fito-reguladores de crescimento em morangueiro(Fragaria spp.): influência no ciclo da cultura e na produ??o final
Lucchesi, Antonio Augusto;Minami, Keigo;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1980, DOI: 10.1590/S0071-12761980000100031
Abstract: an experiment was conducted in the experimental area of horticulture section of escola superior de agricultura "luiz de queiroz", piracicaba (sp), brazil, in order to study the influence of some growth regulators on cycle and final production of strawberry, cv. campinas and monte alegre. the following products were applied: indoleacetic acid (iaa), 30 ppm; 2-(3-chlorophenoxy) propionamid acid (cpa), 75 ppm; giberellic acid (ga3), 30 ppm; (2 - chloroethyl) trimethylammonium chloride (ccc), 1500 ppm; 1,2-dihydro-3,6-pyridazinedione (mh), 900 ppm; and succinic acid-2,2- dimethylhidrazide (sadh), 900 ppm. dosages were sub-divided and applied in three times, one week interval starding three weeks after strawberry transplanting to field. of was concluded that: a) the highest productions were reached with ga3, cpa and iaa; ccc induced smaller and more compact plants, but with medium to large fruits; and the lowest production was obtained with mh. b) plants treated with ga3, cpa and iaa showed earlier fruit production, hoving ga3 and cpa induced the highest number of fruits, but in lower weight and medium volume; ccc, sadh and mh delayed iniciation of production. all products induced plants to produce for longer periods. 'monte alegre' produced higher number of fruits than 'campinas', but there was no difference between total production, having 'campinas' produced larger and heavier fruits.
Efeitos da densidade de popula??o de plantas na cultura de couve-flor (Brassica oleracea L. var. botrytis)
Minami, Keigo;Victoria Fo, Ricardo;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1981, DOI: 10.1590/S0071-12761981000100003
Abstract: an experiment was carried out to study the effects of the following population densities cauliflowers (plants per ha): 20,833 (0.60 m x 0.80 m), 25,641 (0.60 m x 0.65 m), ....37.037 (0.60 m x 0.45 m) , 55.555 (.0.60 m x 0.30 m), and 111,111 (0,60 m x 0,15 m) ; variety snow ball. it was concluded that the effects of plant population density are greater on curd quality (weight and size) than on production per ha. the best plant population density to produce cauliflowers curd for brazil market is from 20,000 to 25,000 plants/ha while for mini-curd is above 55,000 plants/ha.
Efeito da densidade de popula??o de plantas sobre a cultura do repolho (Brassica oleracea var. capitata L.)
Minami, Keigo;Victoria Filho, Ricardo;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1980, DOI: 10.1590/S0071-12761980000100032
Abstract: in order to study the effects of plant population density on cabbage crop (brassica oleracea var-. capitata), an experiment using different spacing (0,60 m x 0.80 m, 0.60 m x 0.65 m, 0.60mx0.45m, 0.60 m x 0.30 m, and 0.60mx 0.15m) was carried out. there were the following changes in cabbage plants due to increasing population density: plant head became conical: number and size (weight, volume and diameters) of leaves decreased; density (weight/volume) and percentage of plants forming no head increased.
Análise quantitativa de crescimento vegetal em cultivares de morangueiro (Fragarta spp.), sob a influência de fito-reguladores de crescimento
Lucchesi, Antonio Augusto;Minami, Keigo;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1980, DOI: 10.1590/S0071-12761980000200001
Abstract: an experiment was conducted at the experimental area of e.s.a. "luiz de queiroz", piracicaba, s?o paulo state, brazil, to study the influence of growth regulators on development of strawberry (fragaria spp.), cultivars campinas and monte alegre the following products were applied: indoleacetic acid (iaa), 30 ppm; 2-(3-chlorophenoxy) propionamid acid (cpa), 75 ppm; gibberellic acid (ga3), 30 ppm; (2-chloroethyl) trimethyl ammonium chloride (ccc), 1.500 ppm; 1-2,dihydro-3,6-piridazinedione (mh), 900 ppm; and succinic acid-2,2-dimethylhidrazide (sadh), 900 ppm; the dosages being applied in three times; with one week interval starting three weeks after transplanting to field. for quantitative analysis of vegetative growth, plants for determining foliar area and dry matter production, were picked up each 14 days, iniciating one week after the last application of growth regulator, and finishing when plants began to produce runners. it was concluded that: ga3. iaa and cpa induced a better growth, givingahigher above ground/root system ratio, foliar area index, dry matter production rate, solar energy conversion efficiency and runner number; ccc and sadh induced medium values of these parameters, medium growth and reasonable production; and the lowest growth indexes were obtained with mh, with reduced growth and production. growth analysis showed that 'campinas' has higher relative growth rate, net assimilation rate, dry matter production rate and solar energy conversion efficiency and has lower relative foliar growth rate and foliar area ratio than 'monte alegre', and there was no difference in foliar area index and above ground/root system ratio between both cultivars.
Bovi, José Eduardo;Minami, Keigo;
Scientia Agricola , 1999, DOI: 10.1590/S0103-90161999000100015
Abstract: the effect of fanning, shaking and brushing was evaluated in angela gigante i 5.100 asgrow's tomato seedlings (lycopersicon esculentum mill.). the experiment was carried out in a high plastic tunnel using a fully randomized design with twelve replications. the parameters evaluated were seedling height, diameter and leaf number; root, shoot and total, dry matter weights and shoot matter dry weight/ root matter dry weight, and height/diameter ratios. the results obtained show that brushing produced shorter seedlings at 27 days of age, with larger diameter in relation to the other treatments and control.
Qualidade de bulbos de cebola em consequência de tratamentos pré-colheita
Ferreira, Marcos David;Minami, Keigo;
Scientia Agricola , 2000, DOI: 10.1590/S0103-90162000000400015
Abstract: pre-harvest treatments were evaluated to enhance onion bulb quality in different onion cultivars adapted to tropical conditions. parameters used were weight loss, skin color and thickness, bulb and firmness. trials were carried out in 1997. four treatments were used: control, copper oxicloride (250 g 100 l-1); boric acid (250 g 100 l-1), and a combination of the two chemical treatments (250 g 100 l-1 of each). treatments were applied at bulbing stage. the six cultivars were serrana, régia, crioula, and the hybrids ht, hs-1 and hs-2. bulbs were stored at room temperature prior to evaluations. results showed that copper oxicloride (250 g 100 l-1) induced an increase in skin thickness, decreased weight loss and enhanced color in cultivars. dark skin cultivars had a better response to pre-harvest treatments in relation to light skin cultivars. firmness was not affected by pre-harvest treatments.
Qualidade fisiológica de sementes de piment?o
Torres, Salvador Barros;Minami, Keigo;
Scientia Agricola , 2000, DOI: 10.1590/S0103-90162000000100018
Abstract: this work was carried out to test the efficiency of various methods to evaluate the physiological quality of pepper, capsicum annuum l. [cv. all big] seeds, to be utilized for quality control tests and to verify their relationship with field emergence. four pepper seed lots were evaluated for seed water content, germination, germination first count, electrical conductivity at 4 and 24 hours, accelerated aging, cold shock and field emergence. the first count test, accelerated aging and electrical conductivity at 4 and 24 hours were reliable to detect differences in vigor of pepper seed lots. electrical conductivity test at 4 hours was more reliable for the classification of lots by vigor.
Bovi José Eduardo,Minami Keigo
Scientia Agricola , 1999,
Abstract: Avaliou-se o efeito de condicionamentos mecanicos de ventila o, agita o e esfregamento em mudas de tomateiro do cultivar Angela Gigante I 5.100 Asgrow (Lycopersicon esculentum Mill.). O experimento foi realizado em estufa plástica tipo tunel, alto com delineamento experimental inteiramente casualizado, com doze repeti es. Os parametros avaliados foram: altura, diametro, número de folhas; massa de matéria seca da raiz, brota es e total, e as rela es entre massa de matéria seca das brota es/ massa matéria seca da raíz, altura/diametro. Os resultados obtidos mostraram que o condicionamento por esfregamento proporcionou, aos 27 dias de idade, mudas de menor altura e maior diametro quando comparadas às mudas dos demais tratamentos e testemunhas.
Qualidade de bulbos de cebola em consequência de tratamentos pré-colheita
Ferreira Marcos David,Minami Keigo
Scientia Agricola , 2000,
Abstract: Com o objetivo de se avaliar o efeito de tratamentos pré-colheita na qualidade de bulbos de cebola, através dos parametros perda de peso, espessura e colora o da casca, diametro e firmeza do bulbo, foi conduzido experimento em Paulínia, Estado de S o Paulo, em 1997. Foram utilizados quatro tratamentos: testemunha; oxicloreto de cobre (250 g 100 L-1 de água); ácido bórico (250 g 100 L-1 de água); e a combina o dos dois últimos e seis cultivares: Serrana, Régia, Crioula e três híbridos da SVS, HT, HS-1 e HS-2. Os tratamentos foram aplicados durante a bulbifica o. Os bulbos foram armazenados à temperatura ambiente (25oC) e analisados periodicamente para os parametros citados. Os resultados permitiram observar que a aplica o pré-colheita do oxicloreto de cobre, nas quatro últimas semanas do ciclo, aumentou significativamente a resistência da casca dos bulbos, reduziu a perda de peso e incrementou a colora o dos mesmos, para todas as cultivares. Cultivares com casca mais escura apresentaram melhor resposta aos tratamentos pré-colheita para a colora o, do que as de casca mais clara. A firmeza dos bulbos, n o foi influenciada pelos tratamentos pré-colheita.
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