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Prediction of net energy values in expeller-pressed and solvent-extracted rapeseed meal for growing pigs

OBJECTIVE: The objective of this study was to determine net energy (NE) of expeller-press (EP-RSM) and solvent-extracted rapeseed meal (SE-RSM) and to establish equations for predicting the NE in rapeseed meal (RSM) fed to growing pigs. METHODS: Thirty-six barrows (initial body weight [BW], 41.1±2.2...

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Detalles Bibliográficos
Autores principales: Li, Zhongchao, Lyu, Zhiqian, Liu, Hu, Liu, Dewen, Jaworski, Neil, Li, Yakui, Lai, Changhua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Asian-Australasian Association of Animal Production Societies 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7888491/
https://www.ncbi.nlm.nih.gov/pubmed/32299168
http://dx.doi.org/10.5713/ajas.19.0962
Descripción
Sumario:OBJECTIVE: The objective of this study was to determine net energy (NE) of expeller-press (EP-RSM) and solvent-extracted rapeseed meal (SE-RSM) and to establish equations for predicting the NE in rapeseed meal (RSM) fed to growing pigs. METHODS: Thirty-six barrows (initial body weight [BW], 41.1±2.2 kg) were allotted into 6 diets comprising a corn-soybean meal basal diet and 5 diets containing 19.50% RSM added at the expense of corn and soybean meal. The experiment had 6 periods and 6 replicate pigs per diet. During each period, the pigs were individually housed in metabolism crates for 16 days which included 7 days for adaption to diets. On day 8, pigs were transferred to respiration chambers and fed their respective diet at 2,000 kJ metabolizable energy (ME)/kg BW(0.6)/d. Feces and urine were collected, and daily heat production was measured from day 9 to 13. On days 14 and 15, the pigs were fed at 890 kJ ME/kg BW(0.6)/d and fasted on day 16 for evaluation of fasting heat production (FHP). RESULTS: The FHP of pigs averaged 790 kJ/kg BW(0.6)/d and was not affected by the diet composition. The NE values were 10.80 and 8.45 MJ/kg DM for EP-RSM and SE-RSM, respectively. The NE value was positively correlated with gross energy (GE), digestible energy (DE), ME, and ether extract (EE). The best fit equation for NE of RSM was NE (MJ/kg DM) = 1.14×DE (MJ/kg DM)+0.46×crude protein (% of DM)–25.24 (n = 8, R(2) = 0.96, p<0.01). The equation NE (MJ/kg DM) = 0.22×EE (% of DM)–0.79×ash (% of DM)+14.36 (n = 8, R(2) = 0.77, p = 0.018) may be utilized to quickly determine the NE in RSM when DE or ME values are unavailable. CONCLUSION: The NE values of EP-RSM and SE-RSM were 10.80 and 8.45 MJ/kg DM. The NE value of RSM can be well predicted based on energy content (GE, DE, and ME) and proximate analysis.