Produtividade, qualidade fisiológica e composição química de sementes de crambe em diferentes doses de fósforo

The crambe is a brassica with high content of oil used for biodiesel production and that has aroused interest in the short cycle and low production cost. However, there are doubts about their response to phosphated fertilization. The objective of this study was to evaluate the effect of different doses of phosphorus on yield, physiological quality, chemical composition and oil content of crambe seeds. The treatments consisted of five doses of phosphorus (0, 25, 50, 75 and 100 kg ha(-1)) applied at sowing. There was no effect of phosphorus on mineral composition and oil content of the seeds of crambe that showed the following averages: 30.11 N, 7.46 P, 7.35 K, Ca 10.06, 6.58 mg and 8.98 g kg(-1) S; 36.25 Cu, Fe 169.40, 36.75 Mn 73.60 mg kg(-1) Zn and 30.22% oil. It was concluded that the productivity of crambe increases with phosphorus rates of up to 100 kg ha(-1), but its use does not affect the survival rate of plants, dry mass, the mass of thousand seeds, the physiological quality, chemical composition and oil content of the seed.

Rendimento do suco e qualidade química do abacaxi sob lâminas e frequências de irrigação

The pineapple crop has a permanent demand for water, variable and dependent on their stage of development, which may affect the production and fruit quality. This study aimed to evaluate the chemical quality of fruits Smooth cayenne pineapple submitted to different levels and frequency of water replacement in the soil. We used a randomized block design in a 4 x 2 factorial arrangement, consisting of four levels of soil water replenishment (50%, 75%, 100% and 125% of crop evapotranspiration) and two irrigation frequencies (1 and 3 days) with four replications. We evaluated the parameters: juice yield (RS), hydrogen potential (pH), total soluble solids (SST), titratable acidity (ATT), SST/ATT relationship, ascorbic acid (AA). It was observed that the blades and irrigation frequencies did not affect the juice yield (RS) and ascorbic acid (AA), the increase of the blades irrigation influenced positively the quality of the fruit as it increases the values of total soluble solids (SST) decreases the acidity (ATT), raises the relationship SST/ATT and hydrogen potential (pH).

Giberelina, citocinina e auxina na qualidade química de bagas de uva superior seedless

Trials were carried out in Juazeiro, Bahia State, Brazil, aiming to test plant regulators composed by gibberellin, cytokine and auxin effects on chemical quality of Superior Seedless grape berries. The first trial studied the effects of Stimulate (R) (bio regulator) and X-Cyte (R) (cytokine) associated to a new gibberellin formulation (N-Large (R)) and associated to Pro-Gibb (R), which is a product used as source of gibberellin. Products were sprayed at berries development phase (18, 21, 51 and 56 days after spur-pruning). Treatments were: T1: Pro-Gibb (R); T2: Stimulate (R) (Dose 1); T3: Stimulate (R) (Dose 2); T4: Stimulate (R) (Dose 3); T5: Pro-Gibb (R) + X-Cyte (R) (Low Dose - DB); T6: Pro-Gibb (R) + X-Cyte (R) (Intermediate Dose - DM); T7: Pro-Gibb (R) + X-Cyte (R) (High Dose - DA); T8: N-Large (R); T9: N-Large (R) + X-Cyte (R) (DB); T10: N-Large (R) + X-Cyte (R) (DM); T11: N-Large (R) + X-Cyte (R) (DA). The second trial aimed to assess the effect of the new gibberellin formulation (N-Large (R)) associated or not with cytokine (X-Cyte (R)) also sprayed straight over the bunches at berries development phase (17, 55 e 66 days after spur-pruning). Treatments were: T1: Pro-Gibb (R) - blank; T2: N-Large (R) (DB); T3: N-Large (R) (DM); T4: N-Large (R) (DA); T5: N-Large (R) (DB) + X-Cyte (R) (DB); T6: N-Large (R) (DB) + X-Cyte (R) (DM); T7: N-Large (R) (DB) + X-Cyte (R) (DA); T8: N-Large (R) (DM) + X-Cyte (R) (DB); T9: N-Large (R) (DM) + X-Cyte (R) (DM); T10: N-Large (R) (DM) + X-Cyte (R) (DA); T11: N-Large (R) (DA) + X-Cyte (R) (DB); T12: N-Large (R) (DA) + X-Cyte (R) (DM); T13: N-Large (R) (DA) + X-Cyte (R) (DA). Experimental design was random blocks with four repetitions with each repetition/parcel having three useful plants in the same row. At harvest, when bunches average had soluble solids over 15 degrees Brix, berries were collected for soluble solids, pH, titratable acidity analysis as well as (SS/AT) ratio calculation. In both trials, plant regulators evaluated did not provide significant changes on chemical quality of 'Superior Seedless' grape berries. Therefore, the lack of differences on response between the commercially used product (Pro-Gibb (R)) and the other products tested (Stimulate (R), X-Cyte (R) e N-Large (R)) prove the last as promising for the ` Superior Seedless' grape cultivation, leaving a larger range of alternative for grape farmers in the Sao Francisco Valley, Bahia.

Germoplasma do gênero Paspalum com potencial para produção de forragem

This study was carried out in Fazenda Canchim in Sao Carlos-SP, physical base of Embrapa Southeast Livestock, aiming to select, based on the agronomic characteristics of productivity of dry matter and quality of the forage, the accesses of suitable gender Paspalum for possessing potentiality of use as foraging plants. Were evaluated for 3 years, with 22 forage grasses, being 19 of Paspalum and three more of control species: Brachiaria decumbens, Andropogon gayanus cv. Baet and Panicum maximum cv. Tanzania, submitted to two intensification levels: high (fertilizer after each cut and supplemental irrigation) and low (only fertilizer of annual replacement without irrigation). The experimental design was of split blocks subdivided in the space and time with two replications. The studied variables were: dry matter production, in vitro dry matter digestibility and crude protein content. The results show that the accesses responded to the intensification level minimizing the negative effect of the stational production. Based on the studied variables, the selected accesses were: BRA-011401 (Paspalum glaucescens); BRA-011681 (P. atratum); BRA009661 (P. atratum) and BRA-019186 (P. regnellii).

Desempenho agronômico e qualidade tecnológica de cultivares de feijão-caupi em função da época de semeadura em Uberaba-MG

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Pitaya: melhoramento e produção de mudas

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Qualidade da cana-de-açúcar avaliadas nas partes do colmo

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Utilização de lodo de esgoto na produção de mudas de aroeira-pimenteira

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Indicadores de qualidade do leite bovino orgânico em duas propriedades leiteiras certificadas do Estado de São Paulo

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Escolaridade e volume de produção têm associação com a percepção de risco de produtores de leite no uso de produtos veterinários

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Qualidade do abacate 'HASS' frigoarmazenado submetido a atmosferas modificadas ativas

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Mancha de ramularia do algodoeiro: agente etiológico, produção de inóculo, resistência de genótipos e controle integrado

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

A qualidade de placas de circuito impresso confeccionadas a partir de poliestireno reciclado

Pós-graduação em Engenharia Mecânica - FEG

Uso de invertase imobilizada em pó de sabugo de milho para produção de açúcar invertido

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Produção de nanocompósito utilizando diferentes fontes de celulose como reforço

Pós-graduação em Agronomia (Energia na Agricultura) - FCA