Composition and Nutritive Value for Pigs of Three Maize Hybrides Introduced in Bulgaria

D. PAVLOV1, V. KATZAROV1, J. STAIKOV1 and P. Holden2
1 Trakia University, Faculty of Agriculture, BG-6000 Stara Zagora. Bulgaria
2 Iowa State University, USA

Abstract

PAVLOV., D., V. KATZAROV, J. STAIKOV and P. HOLDEN, 2002. Composition and nutritive value for pigs of three maize hybrides introduced in Bulgaria. Bulg. J. Agric. Sci., 8: 619–622

The aim of the study is to compare productivity chemical composition and nutritive value of three introduced in Bulgaria maize hybrids: 1. GS 1461 – Israel; 2. DK 493 RR (Dekalb) – Canada (Glyphosat resistant); 3. Kolombo – Pioneer USA. A practical experiment was carried out on deluvial meadow soils under irrigated conditions of Central South Bulgaria. The crops were fertilized 200 kg/ha N and plus 10 kg/ha leaf fertilizer “Poly Feed”.
Metabolizable energy (ME), net energy (NE), average daily gain (ADG) and feed conversion ratio (FCR) were calculated by MCS5. Iowa State University Extension Program based on the ether extract, protein, fiber, calcium, phosphorus and salt contents.
Maize hybrid DK 493 RR – Canada supplied the highest yield of grain. crude protein and net energy. Hybrid Kolombo had the lower productivity.
Hybrid GS 1461 – Israel has a higher content of crude protein, leucine, alanine, glutamic acid, phenylalanine and a higher biological value of the protein (EAAI).

Key words: maize hybrids, productivity, protein value, amino acids, energy