Research On The Comprehensive Control And Storage Quality Change Of Maotai-flavored Daqu Worm

Jiangxiang-Daqu was an important material in the production of Maotai liquor,it was influenced by Daqu insects and storage time when it was storaged.This paper research the trapping and conduct investigation of Daqu pest,the quality change of Jiangxiang-Daqu conventional storage,the flavoring substances changes when it was storaged in different storage time and storage conditions.The aim of this experiment was give some advice for the integrated Control of Daqu pest,the proper storage tiome and the way of storage.The main contents are as follows:(1)The main populations of small Daqu insects were Tribolium castaneum Herbst and Rhizopertha dominica in the new and old workshop,and the main species of Blattodea were Periplaneta americana and Blattella germanica.The small Daqu insects often break out in July,August and September.The Blattodea was in August and September.The total amount of Daqu insects in old workshop was higher than the new.The trapping weight of small Daqu insects was positively correlated with temperature,weight was more than other day in sunny and cloudy day.Sesame oil has effect on trapping of the adults and larvae Blattodea.(2)The trend of moisture content,the total number of colonies,yeast counts,starch content,fermenting power,liquor yield during storage declined;the trend of acidity,mold counts,Saccharification,liquefying power,esterification power firstly rised and then declined,but those indexes were in higher place when storaged four mouths;the content of amino nitrogen increased with the increasing of storage time.The color of Daqu block gradually faded,the scent reduced,Maotai-flavor became significantly,the type and total amount of flavoring substances decresed by54.76% and 90.09% after 8 months storage(3)It will promote the conent of water;When added 0.3g Daqu insects or less into 7kg Daqu,the acidity,amino nitrogen improved for about 10%;mold,saccharification,fermentation and total number of colonies slightly increased from January to May.When added 1g Daqu insects,thequality of Daqu during storage was significantly lower than the control group which was not added.The species of flavoring substances reduced 32 kinds,total flavoring substances decreased by 84.98% compared with group which was not added.(4)Integrated pest control methods will contented Frequency vibration type insect killing lamp and cockroaches trapped.When storaged slightly increase moisture content,acidity,amino nitrogen and microorganisms of Daqu,starch content significantly increased,the properties of Daqu during storage after five months generally higher than conventional storage for about 1%-25%.There are still 60 kinds of flavoring substances remained after 6 months storage,and aromatic and pyrazine had a high content.(5)Storaged in 20?and 30? will increase the property of Daqu,but the microorganisms was in lower level,and had a certain effect on the senses evaluation.It clould be reduce the wastage of the Daqu effectively and protect the total flavoring substances when Daqu Storaged in 10 ?,but bad for the volatiled of substances such as benzaldehyde,so as to the produce of substances such as Benzaldehyde,4-propoxy.The fixed temperature was disadvantaged for Daqu storage.