Minimum Phosphorus Requirement of One-Cycle and Two-Cycle (Molted) Hens
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چکیده
منابع مشابه
The marine phosphorus cycle
Phosphorus, the 13th element to be discovered on our planet, has a rich and varied history spanning match-making, bombs, fertilizer, and pesticides. Entire islands economies (Nauru) have collapsed in the mad hunt for phosphorus rock (Gowdy and McDaniel, 1999). Mineral reserves of this critical and valuable element are now being so rapidly mined from our Earth’s crust that we are approaching a p...
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Phosphorus (P) is a limiting nutrient for terrestrial biological productivity that commonly plays a key role in net carbon uptake in terrestrial ecosystems (Tiessen et al. 1984, Roberts et al. 1985, Lajtha and Schlesinger 1988). Unlike nitrogen (another limiting nutrient but one with an abundant atmospheric pool), the availability of “new” P in ecosystems is restricted by the rate of release of...
متن کاملThe oceanic phosphorus cycle.
Phosphorus (P) is an essential element to all life, being a structural and functional component of all organisms.1-4 P provides the phosphate-ester backbone of DNA and RNA, and it is crucial in the transmission of chemical energy through the ATP molecule (Figure 1). P is also a structural constituent in many cell components such as phosphoproteins, and phospholipids in cell membranes, teeth, an...
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This experiment studied the effect of four calcium (3.0, 3.5, 4.0, and 4.5%) and four available phosphorus levels (0.25, 0.30, 0.35, and 0.40%) in the diet of semi-heavy commercial layers after molting. Hisex Brown layers between 90 and 108 weeks of age were distributed in a completely randomized experimental design with a 4x4 factorial arrangement with 16 treatments of five replicates of eight...
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The Ras-related GTPase Ran functions in nucleocytoplasmic transport by regulating interactions of transport receptors with transport cargo. Three recent studies suggest that Ran uses exactly the same mechanism to regulate spindle assembly during mitosis.
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ژورنال
عنوان ژورنال: Poultry Science
سال: 2004
ISSN: 0032-5791
DOI: 10.1093/ps/83.6.917