Adubação mineral, orgânica e biodinâmica de yacon (Polymnia sonchifolia Poep & Endl): rendimento, qualidade e armazenamento

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

Nutrição mineral e produtividade da batata-doce biofortificada em função de doses de fósforo e potássio

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Manure production and mineral excretion in feces of gilts fed ractopamine

A study was conducted to evaluate the feces+urine produced per animal (FUPA), dry matter, mineral matter, organic matter, nitrogen, phosphorus, potassium and sulfur in feces of gilts fed diets with increasing levels of ractopamine (0, 5, 10 and 15 mg kg-1 of diet). A total of 468 finishing gilts were allotted into 36 pens. In two days of each week, feces and urine were daily sampled in four pens per treatment, quantifying the feces+urine. To determine the characterization of feces, two samples per week were taken daily, in nine pens per treatment. It was used a split plot design, considering the ractopamine level as the plot and the weeks as the subplots. There was no reduction in nitrogen amount in feces. An interaction was detected between ractopamine concentrations and weeks for FUPA and phosphorus, potassium and sulfur in feces. Ractopamine addition in diets for gilts has reduced the feces+urine production and nitrogen and phosphorus excretion. Higher values estimated for potassium content in feces of animals fed diets with 10 and 15 mg of ractopamine kg-1 were found between the second and third week. Increasing levels of ractopamine from 5 to 15 mg kg-1 promoted higher excretion of sulfur over the weeks of supply.

Phosphorus reduction by sifting fish waste meal

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

Inorganic and organic trace mineral supplementation in weanling pig diets

A study was conducted to evaluate the s of dietary inorganic and organic trace minerals in two levels of supplementation regarding performance, diarrhea occurrence, hematological parameters, fecal mineral excretion and mineral retention in metacarpals and liver of weanling pigs. Seventy piglets weaned at 21 days of age with an average initial body weight of 6.70 ± 0.38 kg were allotted in five treatments: control diet (no added trace mineral premix); 50% ITMP (control diet with inorganic trace mineral premix supplying only 50% of trace mineral requirements); 50% OTMP (control diet with organic trace mineral premix supplying only 50% of trace mineral requirements); 100% ITMP (control diet with inorganic trace mineral premix supplying 100% of trace mineral requirements); and 100% OTMP (control diet with organic trace mineral premix supplying 100% of trace mineral requirements). Feed intake and daily weight gain were not affected by treatments, however, piglets supplemented by trace minerals presented better gain:feed ratio. No differences were observed at calcium, phosphorus, potassium, magnesium, sodium and sulfur excreted in feces per kilogram of feed intake. Treatments did not affect calcium, phosphorus, magnesium, sulfur and iron content in metacarpals. Trace mineral supplementation, regardless of level and source, improved the performance of piglets.

Lodo de esgoto e adubação mineral na recuperação de atributos químicos de solo degradado

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

Mineral metabolism in singleton and twin-pregnant dairy goats

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

Root morphology and phosphorus uptake by potato cultivars grown under deficient and sufficient phosphorus supply

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

The effect of filter cakes enriched with soluble phosphorus used as a fertilizer on the sugarcane ratoons

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

Densidade mineral óssea de perus de corte vacinados e não vacinados contra coccidiose

It was evaluated bone mineral density of turkeys submitted the vaccination against coccidiosis. Used 420 turkeys of one day, divided in 4 treatments with 5 repetitions: T1 – control diet; T2 - diet and anti coccidiosis drugs; T3 - diet and commercial vaccine; T4 - diet and recombinant vaccine. To the 28 days the birds had been submitted to the challenge of coccidiosis, carried through inoculation of oocisty talked back directly in the esophagus of the birds. The bone quality was evaluated to the 21, 35, 49 and 72 days of age. For this, 8 birds for treatment had been collected, in each age of collection that had been sacrificed by cervical displacement. The tibiae and femura had been radiographed and tomographed for evaluation of the bone density, had been later evaluated texts of dry substance, bone ashes, calcium and of phosphorus. It had differences only between the ages, being that the treatments had not caused alterations of the bone characteristics. To the 56 days the birds had presented bone quality worse. The treatments had not influenced the studied parameters. What it allows to conclude that the vaccination against coccidiosis promotes good mineralization of the bones.

Impacto da redução do fósforo suplementar sobre fertilidade, habilidade materna e custos com suplementação mineral em vacas de corte mantidas em Urochloa decumbens: Rogério Magnoli Costa. -

Pós-graduação em Ciência Animal - FMVA