Considering the scarce information on nutrient extraction by plants for seed production within vegetable crops, as well as the effect of fertilization over extraction, studying nutrient accumulation in different plant parts under varied fertilization rates is necessary. This study aimed to evaluate the influence of phosphate rates on macronutrient accumulation in cauliflower plants during seed production. Five phosphate rates were studied (0, 300, 600, 900 and 1200 kg/ha P 2 O 5 ), in a randomized complete block design, with four replications. Accumulation of nutrients in the different plant parts was evaluated at the end of the cycle (vegetative and reproductive, the latter divided in seeds and inflorescence). Data were submitted to analysis of variance and regression. Considering only the seeds, a quadratic effect was obtained for the accumulation of all macronutrients, with maximum estimated for rates between 858 and 952 kg/ha P 2 O 5 . Considering the whole plant (total accumulation), a linear increase for P, Ca and S was obtained the higher the P 2 O 5 rates, while the effect was quadratic for N, K and Mg accumulation. The total nutrient accumulation descending order was: K>N>Ca>S>P>Mg, and considering only the seeds was: N>S>K>P>Ca>Mg, S being highlighted as the second most accumulated nutrient in the seeds.

Resumo -A poda apical estimula a emissão de brotos laterais, com isso pode haver maior formação de flores e frutos e, consequentemente, maior número de sementes. Diante disso, objetivou-se avaliar o efeito da poda da haste principal para a produção de frutos e sementes de abóbora. Os tratamentos foram constituídos de plantas sem poda, com poda no sexto, oitavo e décimo nó da haste principal. O delineamento experimental foi em blocos casualizados, com seis repetições. Foi utilizada a linhagem de abóbora do tipo braquítica do Banco de Germoplasma da Universidade Estadual Paulista/Faculdade de Ciências Agronômicas. Foram avaliadas as seguintes características: número de ramos por planta, posição dos frutos nos ramos da planta, produção (número e massa) de frutos por planta; produtividade; massa, comprimento e diâmetro do pescoço e bojo do fruto; massa e número de sementes por fruto; produtividade de sementes e qualidade das sementes (teste de germinação; primeira contagem de germinação; massa de mil sementes; emergência; índice de velocidade de emergência e envelhecimento acelerado). Houve diferença significativa apenas para número de ramos secundários por planta e massa de mil sementes, com maiores valores para as plantas que não foram podadas. Foram obtidas elevada média de germinação (94%) e alta produtividade de frutos (16,9 t ha -1 ) e sementes (148 kg ha -1 ). Conclui-se que a poda apical não influencia a produção de frutos e sementes de abóbora, bem como a qualidade fisiológica das sementes.Palavras-chave -Cucurbita moschata. Dominância apical. Germinação. Tamanho de semente. Vigor.Abstract -The tip pruning stimulates the emission of lateral shoots, thus can produce higher number of flowers, fruits and seeds. This work aimed to evaluate the effect of apex pruning on fruit and seed production in pumpkin. The treatments consisted of plants without pruning, with pruning in the sixth, eighth and tenth node of main stem. The experimental design was a randomized block, with six replications. It was studied a line of pumpkin of the Germplasm Bank of the Universidade Estadual Paulista/Faculdade de Ciências Agronômicas. The characteristics evaluated were: number of branches per plant and fruit position in branches of the plant production (number and weight) of fruits per plant, fruit yield, fruit average weight, fruit length and diameter, seed weight per fruit, seed yield and quality (germination test, first count, thousand seed weight, emergence, speed of emergence and accelerated aging). There was a significant difference only for number of secondary branches per plant and thousand seed weight, with larger values for plants that have not been pruned. It was obtained high average of germination (94%) and good fruit (16.9 t ha -1 ) and seed (148 kg ha -1 ) yield. The apex pruning does not influence the production of fruits and seeds, as well as the physiological seed quality in pumpkin.

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The objective of this study was to evaluate the physiological quality of ‘Chilli pepper’ seeds, extracted from fruits harvested at different stages of maturation, with and without post-harvest rest. Twelve treatments resulted from the 6 x 2 factorial, with six maturation stages (100% green fruits, 90% green and 10% orange fruits, 10% green and 90% orange fruits, 100% orange fruits, 100% red fruits and 100 % matte red fruits, corresponding to 44, 53, 60, 63, 70 and 73 days after anthesis (DAA), respectively), and fruits with and without rest for seven days. Seeds were evaluated two months after extraction as well as after 14 months of storage in a dry chamber (40% relative humidity and 20°C). The characteristics evaluated were: weight of a thousand seeds, germination, first count, electrical conductivity, emergency test and shoot length of seedlings. Fruits of orange chilli pepper 'Malagueta' kept at rest for seven days and bright red fruits and matte without rest produce seeds with physiological quality, which are maintained after a period of 14 months stored in a chamber with 40% relative humidity at 20°C.