-This study aimed to evaluate the growth characteristics of irrigated Vitória pineapple plants grown in semi-arid conditions and determine its developmental stages based on those characteristics. It was used a randomized block design with four replicates. The experimental treatments were: plant harvest at 270, 330, 390, 450, 510, 570, 690, 750, and 810 days after planting (DAP). The following variables were determined: plant height, stem diameter, D-leaf length, D-leaf fresh and dry mass, biomass production of plants and plant parts (organs), and vegetative biomass. Five phenological stages are proposed based on vegetative biomass production: ≤ 20% biomass production (V1); 21-40% (V2); 41-60% (V3); 61-80% (V4); and > 80% (V5). The maximum growth rate for plant height, D-leaf length, and stem diameter was observed at the end of the phenological stage V1 (390-411 DAP), and at the end of stage V5 these plant traits had average values of 106, 82, and 7 cm, respectively. The maximum biomass accumulation rates were observed at stages V4 and V5, resulting in a final fruit yield and total fresh biomass of 72 t ha -1 and 326 t ha -1 , respectively. Finally, we estimated that 80% of the accumulated biomass may remain in the field after fruit and slip harvest, and could be incorporated as plant residue into the soil. Index Terms: Ananas comosus var. comosus, biomass production, maximum accumulation rate. CRESCIMENTO E PRODUÇÃO DO ABACAXIZEIRO 'VITÓRIA' IRRIGADO EM CONDIÇÕES DO SEMIÁRIDORESUMO -O estudo avaliou o crescimento do abacaxizeiro 'Vitória' irrigado em condições do semiárido brasileiro e definiu etapas de desenvolvimento por meio de características fenotípicas e morfológicas. O delineamento estatístico utilizado foi em blocos casualizados, com quatro repetições. Os tratamentos foram definidos por nove épocas de amostragem de plantas e seus componentes (270; 330; 390; 450; 510; 570; 690; 750 e 810 dias após o plantio -DAP). Foi avaliada a altura da planta, diâmetro do talo, comprimento e peso fresco e seco de folha 'D', a produção de biomassa total e dos componentes: folha, talo, raiz, fruto, coroa, filhotes e biomassa vegetativa, (folhas, talo e raiz). Por meio da produção relativa de biomassa vegetativa foram propostos cinco estádios fenológicos de crescimento do abacaxizeiro: até 20% de produção de biomassa-V1; 21-40%-V2; 41-60%-V3; 61-80%-V4; acima de 80%-V5. As características altura da planta, comprimento da folha 'D' e diâmetro do talo atingiram taxas de máximo crescimento no final do estágio fenológico V1 (390 e 411 DAP), e a estabilização destas características ocorreu no final do estágio V5, com valores médios de 106 cm, 82 cm e 7 cm, respectivamente. As taxas de máximo acúmulo foram observadas nos estádios V4 e V5, implicando a produção final de 72 t ha -1 de frutos e 326 t ha -1 de biomassa da planta (matéria fresca); desta última, estimou-se que 80% da biomassa acumulada pode permanecer na área de cultivo, após a colheita de frutos e mudas, como fonte de resíduos vegetais para o solo. Termos p...
SUMMARYThe nutritional state of the pineapple plant has a large effect on plant growth, on fruit production, and fruit quality. The aim of this study was to assess the uptake, accumulation, and export of nutrients by the irrigated 'Vitória' pineapple plant during and at the end of its development. A randomized block statistical design with four replications was used. The treatments were defined by different times of plant collection: at 270, 330, 390, 450, 510, 570, 690, 750, and 810 days after planting (DAP). The collected plants were separated into the following components: leaves, stem, roots, fruit, and slips for determination of fresh and dry matter weight at 65 ºC. After drying, the plant components were ground for characterization of the composition and content of nutrients taken up and exported by the pineapple plant. The results were subjected to analysis of variance, and non-linear regression models were fitted for the significant differences identified by the F test (p<0.01). The leaves and the stem were the plant components that showed the greatest accumulation of nutrients. For production of 72 t ha -1 of fruit, the macronutrient accumulation in the 'Vitória' pineapple exhibited the following decreasing order: K > N > S > Ca > Mg > P, which corresponded to 898, 452, 134, 129, 126, and 107 kg ha -1 , respectively, of total accumulation. The export of macronutrients by the pineapple fruit was in the following decreasing order: K > N > S > Ca > P > Mg, which was equivalent to 18, 17, 11, 8, 8, and 5 %, respectively, of the total accumulated by the pineapple. The 'Vitória' pineapple plant exported 78 kg ha -1 of N, 8 kg ha -1 of P, 164 kg ha -1 of K, 14 kg ha -1 of S, 10 kg ha -1 of Ca, and 6 kg ha -1 of Mg by the fruit. The nutrient content exported by the fruits represent important components of nutrient extraction from the soil, which need to be restored, while the nutrients contained in the leaves, stems and roots can be incorporated in the soil within a program of recycling of crop residues.Index terms: Ananas comosus var. comosus, dry matter, uptake rate. RESUMO: ABSORÇÃO, ACÚMULO E EXPORTAÇÃO DE MACRONUTRIENTES PELO ABACAXIZEIRO 'VITÓRIA' IRRIGADOO estado nutricional do abacaxizeiro tem grande influência no crescimento de suas plantas e na produção e qualidade de seus frutos. Este estudo teve o objetivo de avaliar a absorção, o acúmulo e a exportação de nutrientes pelo abacaxizeiro 'Vitória', irrigado nas fases de crescimento e produção. O delineamento estatístico utilizado foi em blocos casualizados, com quatro repetições. Os tratamentos foram definidos por distintas épocas de coleta de plantas: 270, 330, 390, 450, 510, 570, 690, 750 e 810 dias após o plantio (DAP). As plantas coletadas foram separadas nos seguintes componentes: folhas, talo, raízes, fruto e mudas, para determinar o peso de matérias fresca e seca a 65 ºC. Após secagem, os componentes das plantas foram moídos para caracterizar o teor e conteúdo de nutrientes absorvidos e exportados pelo abacaxizeiro. Os resultados foram submeti...
<p>Estudos relacionados aos aspectos biométricos de frutos e sementes são importantes devido à necessidade na identificação e diferenciação da espécie. A partir da caracterização biométrica de frutos é possível obter informações para a conservação e exploração da espécie, e constitui um instrumento fundamental para detectar a variabilidade entre indivíduos em uma determinada área. Dessa forma, objetivou-se caracterizar biometricamente frutos e sementes de <em>Bauhinia forficata</em> L. de plantas provenientes do município de Vitória da Conquista, BA. Para isso foram selecionados aleatoriamente 30 frutos e 100 sementes, os quais foram medidos com o auxílio de um paquímetro digital (0,01mm), determinando-se comprimento e diâmetro de frutos e sementes. Os frutos de <em>Bauhinia forficata </em>L<em>,</em> provenientes do município de Vitória da Conquista, apresentaram variação nas suas dimensões biométricas e na massa fresca do fruto indicando potencial de seleção da espécie estudada. </p><p align="center"><strong><em>Biometric analysis of fruits and seeds of Bauhinia forficata </em></strong><strong>L.</strong></p><p><strong>Abstract: </strong>Studies related to biometric aspects of fruits and seeds are important because of the need to identify and differentiate the species. From the fruits of biometric characterization it is possible to obtain information for the conservation and exploitation of the species, and is a key instrument to detect the variability between individuals in a given area. Thus, this study aimed to characterize biometrically fruits and seeds of Bauhinia L. forficata from the city of Vitória da Conquista, Bahia. To this were 30 randomly selected fruits and 100 seeds, which were measured with the aid of a caliper (0.01 mm), determining the length and diameter of fruits and seeds. The fruits of Bauhinia forficata L, from the city of Vitoria da Conquista, showed variations in their biometric dimensions and fresh fruit mass indicating potential of the studied species selection.<strong></strong></p>
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