This experiment was conducted to investigate the changes of corn gluten meal (CGM) quality and the accumulation of deoxynivalenol (DON) after inoculation with Fusarium graminearum under aerobic conditions. The inoculation amount of 1×105, 1×106, 1×107 conidia/g Fusarium graminearum were accurately inoculated into CGM with moisture content of 22%. The triangle bottle was cultured in aerobic, oxygen supply of 1 020 m2/m3, the culture temperature was (25±2)℃, the humidity was (75±5)%, and the culture was carried out for 60 days. The quality indexes of CGM and the accumulation rule of DON were determined. The results showed as follows:the inoculum of Fusarium graminearum had no effect on the change of N-source crude protein, amino acid contents and C-source ether extract, starch, crude fibre contents and quality evaluation indexes for acid value, protein solubility, energy change for Fusarium graminearum. With the prolongation of culture time, the amino acid contents was quadratic (P<0.01), the ether extract, starch, crude fibre contents, protein solubility and energy were decreased linearly (P<0.01), the acid value was increased linearly (P<0.01).The inoculum of Fusarium graminearum had an effect on the change of total molds. With the prolongation of culture time, the total molds was quadratic (P<0.01). Fusarium graminearum pre-toxicity:0 to 10 d; mid-toxicity:11 to 15 d; late production of poison:16 to 60 d. Under aerobic conditions, the inoculation amount of Fusarium graminearum has no effect on nutrient changes, and has an effect on the total molds and toxin accumulation. The longer the culture time is, the higher the inoculum of Fusarium graminearum is and the worse the quality is. The accumulation rule of DON and 15AC-DON are existed.
YAN Shanshan
,
LIU Guangmang
,
WANG Jianping
,
LIN Yan
,
BAI Shiping
,
ZHANG Keying
,
WU Caimei
. Variation of Corn Gluten Meal Quality Contaminated by Fusarium graminearum and Accumulation of Deoxynivalenol under Aerobic Conditions[J]. Chinese Journal of Animal Nutrition, 2020
, 32(2)
: 905
-914
.
DOI: 10.3969/j.issn.1006-267x.2020.02.046
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