The purpose of this research was to assess the plants growth and production of genotypes of 4 genomic groups of banana: 'Nanicao-iAC-2001', 'Grande Naine', 'Caipira' and 'Nam' (AAA); 'maca', 'Thap maeo', 'PrataAna'and 'Prata Zulu'(AAB); 'FHIA01', 'FHIA18', 'Prata Grauda'and 'maca Tropical' (AAAB), in Botucatu, state of Sao Paulo, Brazil. Some growth characteristics were evaluated such as: plant height, the pseudostem circumference, number of leaves, number of days between planting and flowering, number of days between flowering and harvest and number of days from planting to harvest. The production characteristics such as the bunch weight, number of fruits, average weight of the fruits, number of hands and weight, number, length and diameter of the fruits of the 2ndhand and yield. The results indicated that in the group AAA, 'Nanicao' showed good characteristics regarding to growth and production. However, 'Grande Naine' had the highest values in productive terms. 'Nam' showed the lowest height and the shortest cycle, but it had low productive values. Regarding to the group AAB, 'Prata Zulu' showed the biggest pseudostem circumference, good productive characteristics, but it had the longest cycle and the highest height. 'Thap maeo'standsout asit shows goodproductioncharacteristics.'PrataAna'had the lowest height andthe shortest cycle. However, it did not have a good productive performance. in relation to the group AAAB, 'FHIA 01' showed the highest values in most of the characteristics which were evaluated, standing out among the other hybrids. We can conclude that 'Grande Naine' stands out inside the group AAA, 'Thap maeo' and 'Prata Zulu' inside the group AAB and 'FHIA 01' inside the group AAAB.

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Avaliação de genótipos de bananeira em Botucatu-SP

There is a large number of banana cultivars in Brazil, but considering consumer preference, productivity, tolerance to pests and diseases, appropriate size and resistance to drought and cold, there are few cultivars with agronomic potential to be used commercially. Aiming to evaluate the vegetative development of banana genotypes at Vale do Ribeira (Brazil) conditions the following materials were tested, separated into two genomic groups: AAAA (Bucaneiro, FHIA 02 and FHIA 17), and AAAB, subdivided according to the cultivar used in the breeding: Prata (BRS Garantida, FHIA 18, BRS FHIA Maravilha, BRS Platina and PA94-01); Pacovan (BRS Japira, BRS Pacovan Ken, PV79-34, PV94-01 and BRS Vitoria); and Yangambi n.2 (BRS Tropical, BRS Princesa and YB42-03). The cultivars Grande Naine (AAA), Pacovan (AAB), Prata ana (AAB) and Yangambi (AAA) present development, production and sensory characteristics similar to the evaluated genotypes, so they were used to compare to standards. During two cycles it was evaluated: height, pseudo stem diameter, number of active leaves (on blooming and in the harvest), the interval between planting and blooming and the interval between planting and harvest (days). It was calculated confidence intervals in different groups and types of bananas. According to the obtained data it can be concluded that genotypes from AAAB group with 'Paconvan' genitor cultivar are not suitable for cultivation in the region due to the plants height. The genotypes that have potential to be cultivated in Vale do Ribeira region are: AAAA (FHIA 02 and FHIA 17), AAAB group with 'Prata' genitor cultivar (FHIA 18, BRS Garantida and PA94-01) and with 'Yangambi n.2' genitor cultivar (BRS Tropical, BRS Princesa and Yangambi).

https://www.scielo.br/pdf/rbf/v35n1/14.pdf

Avaliação agronômica de genótipos de bananeiras em condições subtropicais, Vale do Ribeira, São Paulo - Brasil

The objective of this research was to evaluate the growth characteristics and the productive potential genotypes of banana tree in Botucatu/SP. It was evaluated growth characteristics such as plant height, pseudostem circumference, number of leaves, number of days between flowering and harvest, measured at the flowering time. It was also measured production characteristics, such as bunch weight, number fruits, average weight of the fruits, productivity, number of hands and weight, number, length and diameter of the 2nd bunch. The experimental design was completely randomized with 11 treatments (genotypes), five replications and two plants per plot. The genotypes that showed the better agronomic performance within each genomic group were 'Grand Naine'(AAA), 'Thap Maeo' (AAB) e 'Fhia 01' (AAAB).

/pdf/crescimento-e-producao-de-genotipos-de-bananeiras-em-clima-vw16n3c2g8.pdf

Crescimento e produção de genótipos de bananeiras em clima subtropical

Pea crop is a feasible option for agriculture in low lands during winter season. However, this crop is not adapted to extreme conditions of water deficit or excess. In hidromorfic soils, temporary waterlogging or flooding conditions often occur affecting directly plant growth. The effect of water level drawdown on the growth and yield of pea, cv Axe, and the most sensitive growing stage of the crop to soil water excess were estimated. The effects of waterlogging and water table drawdown were proportional to flooding time, especially when waterlogging occurred at the vegetative stage. The major susceptibility of the pea plants to waterlogging was in reproductive stage, with significant yield reduction in all treatments. On the other hand, we observed that drawdown velocity had no effect on results, but on vegetative stage when a water level lowering in depths of more than 20 cm per day caused crop yield reductions of nearly 20%.

/pdf/efeitos-de-inundacoes-temporarias-do-solo-em-plantas-de-10l6epy1ad.pdf

A.M Carneiro

Papers

As braquiarias : uma alternativa ?