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| Brum,Olívio Bochi; López,Secundino; García,Ricardo; Andrés,Sonia; Calleja,Alfredo. |
| The aim of the present study was to investigate the influence of cutting frequency, harvest season and nitrogen fertilization on yield and floristic composition of the herbage harvested from a mountain meadow. The meadow was divided into 22 plots, each receiving a different N P K fertilization treatment. The study lasted seven years, and during the first three years (1985-1987) each plot was harvested twice per year (June and September) according to a traditional harvest system, whereas in the years 1989-1991 each plot was harvested three times per year (spring, summer and autumn) following a more intensive harvest system. Nitrogen fertilizer favoured the development of the grasses in spring, thus reducing the proportion of legumes in the two cut harvest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical composition; Cutting frequency; Floristic composition; Herbage yield; Nitrogen fertilization. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000400002 |
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| Dias,Raquel Souza; López,Secundino; Borgatti,Laura Maria Oliveira; Kebreab,Ermias; Vitti,Dorinha Miriam Silber Schmidt; Abdalla,Adibe Luiz; Appuhamy,Jayasooriya Arachchige Don Ranga Niroshan; France,James. |
| ABSTRACT: A reliable determination of endogenous phosphorus (P) excretion is required to measure P utilization in chickens accurately. The objective of this study was to investigate phosphorus (P) retention in broilers fed diets formulated with different feed ingredients. Sixty-four 15-d old broiler chicks were fed diets in which part of the dietary P was provided from dicalcium phosphate, maize, barley or soybean. Level of supplementation of each ingredient was calculated to provide two levels of total P (4.5 or 5.0 g kg−1 feed). Birds received a single injection of 3 MBq of 32P to determine endogenous P excretion using the isotope dilution technique. Four days after injection, blood and excreta were collected for analysis of inorganic and radioactive P.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chicken; Endogenous; Isotope dilution; Phosphorus retention. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019000100018 |
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