Role of animals in fallow management in the tropics

"Russet lawns and fallows gray where the nibbling flocks do stray" -Milton, L'Allegro, 1645 Animals have existed in fallows for at least 350 years and probably much longer. Animals form an essential link in increasing the availability of the nutrients contained in the fallow for subsequent crops. While green manures are usually excellent sources of N, K and Mg for subsequent crops, they frequently contain inadequate amounts of P and Ca in available forms for adequate crop production. While a Mucuna deerengiana Merrill fallow was as effective as chicken manure on a soil with high P retention properties in increasing organic P fractions extracted by sodium hydroxide and bicarbonate, inorganic and resin extracted P fractions were much lower. N release from species with high tannin levels, such as Calliandra calothyrsus Meissn. can be increased by feeding to animals. Chicken manure has higher Ca and P content than cattle manure and the use of fallow species which can serve as poultry feeds should be encouraged.

Bibliographic Details

Main Authors:	82391 Kass, D., Ibrahim, M. 225, 116959 Schlonvoigt, A., 68165 Flores, O., 2681 American Society of Agronomy, Madison, Wis. (EUA), 2000 Annual Meetings Abstracts Minneapolis, MI (EUA) 5-9 Nov 2000
Format:	biblioteca
Published:	Minnesota (EUA) 2000
Subjects:	TROPICOS, MATORRAL, SISTEMAS SILVOPASCICOLAS, ABONOS ORGANICOS, MANEJO DEL SUELO,
Tags:	Add Tag No Tags, Be the first to tag this record!