Neusete Maria da Silva Patês

Características morfogênicas e estruturais de duas espécies de braquiária adubadas com diferentes doses de nitrogênio

The objective of this work was to evaluate the morphogenetic and structural characteristics of Brachiaria brizantha and decumbens submitted to different nitrogen doses (N). The experiment was carried in a greenhouse. The treatments consisted of four N doses (0, 75, 150 and 225 mg/dm3 of N) and two grasses (Brachiaria brizantha and decumbens). Nitrogen fertilization was subdivided into three applications. A completely randomized block experimental design with five repetitions was used. For the morphogenetic and structural characteristics, the daily foliar structure emergence, total number of leaves and number of tillers per B. decumbens plant was higher for B. brizantha. However, for phyllochron, the daily foliar prolongation and life duration of the B. brizantha leaf were higher. B. decumbens and brizantha responded increasingly up to 190 mg/dm3 of nitrogen in relation to the majority the available characteristics. The process senescence is accelerated with increase of the nitrogen doses, reducing the life duration of leaves.The objective of this work was to evaluate the morphogenetic and structural characteristics of Brachiaria brizantha and decumbens submitted to different nitrogen doses (N). The experiment was carried in a greenhouse. The treatments consisted of four N doses (0, 75, 150 and 225 mg/dm3 of N) and two grasses (Brachiaria brizantha and decumbens). Nitrogen fertilization was subdivided into three applications. A completely randomized block experimental design with five repetitions was used. For the morphogenetic and structural characteristics, the daily foliar structure emergence, total number of leaves and number of tillers per B. decumbens plant was higher for B. brizantha. However, for phyllochron, the daily foliar prolongation and life duration of the B. brizantha leaf were higher. B. decumbens and brizantha responded increasingly up to 190 mg/dm3 of nitrogen in relation to the majority the available characteristics. The process senescence is accelerated with increase of the nitrogen doses, reducing the life duration of leaves.

Características morfogênicas e estruturais do capim-tanzânia submetido a doses de fósforo e nitrogênio

The experiment was accomplished in a greenhouse from May to August of 2005, with the objective of to evaluate the effect of phosphorus and nitrogen fertilization on morphogenetic and structural characteristicas of Tanzania grass. The morphogenetic evaluations included leaf appearance, leaf elongation rate, and stem elongation rate. The structural evaluations measurements were: number of leaves, number of green leaves, number of tillers per plant, and final leaf length. It was used a complete randomized experimental design in 4 x 2 factorial scheme, being four phosphorus doses (0, 50, 100, and 150 kg of P2O5/ha) and two doses of nitrogen (0 and 100 kg of N/ha), with four replicates. It was utilized pots with 6.3 liters capacity each, leaving four plants per pot after staging. The N and P combination affected leaf elongation rate, stem elongation rate, number of tillers per plant, and number of green leaves per tillers. Nitrogen supply had a positive effect on leaf appearance rate, number of leaves, and final leaf length of tanzaniagrass. The majority of the studied variables were affected by the use of phosphorus when associated to N fertilization.

Produção e valor nutritivo do capim-tanzânia fertilizado com nitrogênio e fósforo

The experiment was conducted in a greenhouse and aimed to evaluate the effect of N and P fertilization on dry matter (DM) production of shoots and roots, crude protein (CP) production and concentration, and neutral detergent fiber (NDF) concentration of Tanzania grass. It was used a completely randomized experimental design in a 4 × 2 factorial scheme, being four N doses (0, 50, 100, and 150 mg N/dm3) and two doses of P2O5 (0 and 45 mg P2O5/dm3), with four replicates. It was used pots with 6.3 L capacity, in which the grass seeds were sawed, leaving three plants in each pot. It was observed interaction among N and P doses for shoot and root DM production. Shoot DM production at the 45 mg of P2O5/dm3 dose were 4.7, 18.5, 32.3, and 46.1 g/pot whereas root production at the same P level were 6.3, 41.7, 77.1, and 112.5 g/pot, for 0, 50, 100, and 150 mg of N/dm3, respectively. There was no difference for NDF concentration as a function of N and P doses, but CP concentration increased with increasing N fertilization when P was not added. Increasing N fertilization in the presence of P fertilization increased the production and nutritive value of tanzaniagrass.

Características morfogênicas de Braquiárias em resposta a diferentes adubações

The morphogenic characteristics of Brachiaria brizantha and Brachiaria decumbens were studied in function of different fertilization. The study was conducted in a green house evaluating two Brachiaria cultivars (B. brizantha cv. Marandu and B. decumbens cv. Basilisk) and five different fertilizations (no fertilizer, P, N, NP and NK). The assay was conducted in a 2 x 5 factorial scheme in a completely randomized design, with four repetitions. The morphogenic evaluations included leaf emergence, leaf elongation rates and filocron. The answer of the cultivars was quite expressive to the studied variables relative to nitrogen supply and its combination with phosphorus and potassium. The Basilisk grass was more productive than Marandu grass. The nitrogen importance as a tool to manipulate plant structure was evidenced.

Aspectos produtivos e sanitários do rebanho leiteiro nas propriedades do sudoeste da Bahia

Milk is a food of great nutritional importance. In addition, the dairy can be highlighted by the economic and social development that promotes in the rural properties. Thus, the objective of this study was to characterize milk production and animal health management of properties in the dairy region of the southwestern region of Bahia. The methodology proposed is made by applying a questionnaire with objective questions, using a sample of 94 producers participating in the research that provide milk for dairy cooperatives and dairy in the region registered in the preliminary farm diagnosis in program Geraleite. The data obtained are important to know and to compare the profile of dairy farms in this region, 54.7% of producers did not take husbandry notes and 64.9% did not take notes related to the economics. Of the respondents 82% make one milking and 18% two milkings per day in properties, the natural mating uncontrolled was the reproductive management more used. The average milk production on farms was 1125 liters of milk /cow/year and 3.1 liters/cow/day. This low productivity is due mainly to technological deficiency, non specialized animals and lack of technical assistance in the farms.