Nitrogen efficiency in global animal production
作者： Klaas W. Van der Hoek
DOI: 10.1016/S0269-7491(98)80025-0
关键词:
摘要: Abstract Nitrogen plays an important role in animal production because it is essential for the of tissue, milk, eggs and wool. Grasses provide more than 70% global protein intake by animals. Two-thirds remaining supplied feedstuffs one-third products like kitchen wastes. The efficiency nitrogen slightly over 10%, with result that 102 Tg (10 12 gram) are excreted on a yearly basis all domesticated This article presents balance sheets production, crop agricultural sector. It discusses present possible improvements. For sustainable world necessary to study establish desired between human food feed production.
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