Nutritional value of quality protein maize for starter and finisher swine

Abstract

Growth trials with starter (n = 120, 6.8 kg initially, 28 d of age, Exp. 1) and finisher (n = 70, 59 kg initially, Exp. 2) pigs were conducted to compare quality protein maize (QPM, .40% lysine) and normal corn (.31% lysine) in simple corn-based diets containing the same levels of soybean meal. In Exp. 1, pig performance was similar (P greater than .10) on all diets, regardless of the level of soybean meal, suggesting that QPM and normal corn have similar feeding value in lysine-adequate (.99 to 1.11%) diets. In Exp. 2, less soybean meal was needed in QPM than in normal corn diets to maximize performance; increasing soybean meal from 10.8 to 13.8% improved rate (P less than .05) and efficiency (P less than .01) of gain of pigs fed normal corn diets but had no effect on performance of pigs fed QPM diets. A QPM-based diet containing 6% soybean meal and supplemental lysine and tryptophan failed to maximize feed efficiency, but growth rate was equal to that obtained on the normal corn diet with 13.8% soybean meal. The apparent fecal digestibility of GE and ileal digestibility of N were similar for QPM and normal corn, but apparent ileal digestibility of most essential amino acids was slightly higher for QPM (Exp. 3). Experiment 4 compared apparent digestibilities of QPM, conventional opaque-2 corn and two high-protein corns. Digestibilities differed (P less than .05) among the corns, but the absolute differences were small and were likely due to differences in amino acid content of the corns.(ABSTRACT TRUNCATED AT 250 WORDS)

Evaluation of quality protein maize as a feed ingredient for layer pullet

“…The approximate composition of QPM was similar to that of normal maize, although QPM tended to have higher levels of crude protein, ether extract, crude fibre and gross energy. Similar observations have been made by Burgoon et al (1992), Ahenkora et al (1994) and Martinez et al (1996). The amino acid profiles show that of the five critical amino acids, QPM had higher levels of arginine (+25%), cystine (+35%), tryptophan (+33%) and lysine (+33%) than normal maize, while the level of methionine in QPM was 5% less than in normal maize.…”

Compositional and transcriptional analyses of reduced zein kernels derived from the opaque2 mutation and RNAi suppression

“…The improvement in protein quality of corn can have considerable commercial impact on monogastric livestock and poultry (Johnson et al 2001). Swine feeding studies have shown that QPM diets were superior to regular feed corn diets in terms of weight gains (Sullivan et al 1989) and reductions in the requirement for soybean meal supplementation that is sometimes used to increase the lysine content of corn meal (Burgoon et al 1992).…”

Avaliação da influência dos milhos QPM nas características sensoriais de bolo

“…Vários estudos foram realizados a respeito do potencial nutricional dos milhos QPM [3,7,8,9,10,11,12,25,27]. Entretanto, até o momento nenhuma pesquisa foi realizada avaliando a influência dos milhos QPM nas características sensoriais de produtos alimentícios.…”