Research On The Quality Changes Of Protein Feed During Storage

Our country imported and saved a large number of protein feed from abroad every year.During long transport and storage, the quality of the protein feed will decline due to the effects oftemperature, humidity, mold and other factors. Cause great economic losses to China’s feedindustry. The experiment to study the variation of quality protein feed during long-term storageprocess by simulating warehouse storage environment, pretreatment protein feed and observe itseffect on the quality of the store in order to obtain valuable data and services in the actual plantprotein feed store. As a result:(1) During storage, by detecting the change in routine protein feed nutrients, the studyfound that the crude protein content remained unchanged, the moisture content increased, fat andtrue protein content decreased, when the storage temperature is30℃, humidity is80%, the trueprotein and crude fat content decreased significantly (P<0.05). Storage15months later, Themoisture content of imported fishmeal (Peru), domestic fishmeal (Wenling), domestic fishmeal(Yuhuan), meat and bone meal, rapeseed meal, soybean meal, cottonseed meal, distiller’s grainincreased by0.42%,0.26%,0.38%,0.50%,0.39%,0.39%,0.36%,1.11%. The content of crude fatdecreased by5.60%,2.73%,3.87%,3.87%,1.51%,1.58%,1.44%,3.51%, The content of true proteindecreased by0.42%,0.26%,0.38%,0.50%,0.39%,0.39%,0.36%,0.50%.(2) The freshness of protein feed gradually decreased During storage time, by detectingchanges in protein feed freshness indicators, researchers found that acid value, volatile basicnitrogen, thiobarbituric acid value scales linearly, such as, The cubic epuation of the importedfish meal acid value is y=0.0056x3-0.1190x2+0.8620x+1.348, R2=0.9850.peroxide value cubicepuation is y=0.0579x3-1.3160x2+12.598x+64.464best,R2=0.9980. Cubic epuation of TBA isy=0.0195x3-0.5081x2+504810x+10.440,R2=0.9977.(3) During storage, by detecting the change of the mold total number of feed protein, Thestudy found that,the total number of fungi of imported fishmeal (Peru), domestic fishmeal(Wenling), domestic fishmeal (Yuhuan) gradually increased, during storage. Imports of fishmeal(Peru), domestic fishmeal (Wenling), domestic fishmeal (Yuhuan), soybean meal, cottonseedmeal can be safely stored for300d, MBM can safely store240d, rapeseed meal, Distillersgrains can be safely stored for420d.(4) By using the three methods of vacuum dehydration, degreasing and ultrasonic ring diepellet to pretreatment protein feed, Based on the fungal restrict feeding amount stipulated in"feed hygiene standard GB13078-2001" of the protein feed for the evaluation criteria,the resultsshow that the three kinds of feed pretreatment could prolong the storage period., the storage period of soybean meal, cottonseed meal, rapeseed meal dehydration0.5h samples wereprolonged90,90,60d, the storage period of dehydration1h samples were prolonged120,120,90d; the storage time of import fishmeal (Peru), domestic fishmeal (Wenling), domestic fishmeal(Yuhuan), meat and bone meal, distillers skim1h samples were extended60,30,30,120,30d,thestorage time of distillers skim1h samples were extended90,60,60,150,60d; the particle diameterof imported fish meal, homemade meal (Wenling), the storage time of domestic fishmeal(Yuhuan), meat and bone meal, distillers grains, soybean meal, cottonseed meal of3mm,rapeseed meal samples were extended30,30,60,90,30,60,60,90d.the particle diameter of9mmsamples were extended60,60,90,120,60,90,90,120d.