截至10月10日,黑龙江省已收获水稻、大豆、玉米等农作物超1.23亿亩,占应收面积50％以上,秋整地面积近2 000万亩. 黑龙江省统筹推进疫情防控和秋收生产,压实秋收生产责任,科学安排收获顺序,统筹抓好秋季整地,组织科学晾晒保管,搞好产销精准对接,使秋收工作有序进行,实现了适时抢收快收、应收尽收.
记者23日从中国国家粮食和物资储备局获悉,目前,中国粮库储粮损失基本消除,粮食储藏周期内综合损耗率控制在1％以内. 22日晚在山东滨州召开的全国粮食产后节约减损工作现场推进会新闻通气会上,国家粮食和物资储备局安全仓储与科技司司长周冠华介绍了中国粮食产后节约减损工作有关情况.
In order to improve the efficiency and quality of screw extrusion of small diameter puffed particles,the POLY-FLOW software was used to simulate the isothermal flow field of the screw extrusion process with a diameter of 0.4 mm die hole.The effects of factors such as pre die pressure and transition angle of the die hole on the melt flow field inside the mold hole were analyzed.The research results indicated that as the pressure on the material before entering the die increases,the flow rate and shear rate of the material melt in the die hole increased,the viscosity decreased,and the yield increased.Under different transition cone hole angles,the flow state of the melt in the die hole had little difference,and the trend of changes in various physical quantities slowed down with the decrease of cone hole angle,which was conducive to the uniform extrusion of the mate-rial.In actual production,the production efficiency and quality of small size expanded particles could be improved to some extent by increasing the pressure before the die and using the extrusion template with small angle of cone hole.
Microbial solid fermentation is difficult to dissipate heat,difficult to control anaerobic,poor product stability and other problems,and the synergistic mechanism between different probiotic strains is not clear,the study aims to find the best compatibility between different probiotic strains and its fermentation process parameters,and develop a functional biological fer-mented feed for female piglets through animal experiments.In this study,a single factor experimental design was used to opti-mize the fermentation parameters(inoculation amount,moisture,fermentation temperature and fermentation time)of 3 strains of excellent probiotics,namely Subtilis sphaerae(BS-PCA),Lactobacillus plantarum KA and Lactobacillus plantarum KC,which were screened in the laboratory in the previous stage,and the solid-state fermentation biological feed was applied to the feed of lactating sows and weaning piglets.The effect on growth performance was measured.The experimental results showed that the optimal fermentation process of feed raw materials was 5.0％inoculation amount,40％fermentation water,30～35℃,3 days of fermentation.After 3 days of fermentation,pH value decreased from 5.51 to 4.21,crude protein content increased from 25.12％to 26.11％,acid-soluble protein content increased from 4.81％to 5.89％.The animal test results showed that compared with the control group,the fermented feed group could significantly increase the weaning litter weight and weaning gain(P＜0.05),and significantly increase the average daily feed intake of sows(P＜0.05).Compared with the control group,fermented feed group could significantly increase the daily gain of piglets,reduce the ratio of feed to meat(P＜0.05),improve the survival rate of piglets,and significantly reduce the diarrhea rate of piglets(P＜0.05).In this experiment,a safe,efficient and stable func-tional biological fermented feed for female piglets was developed by using high efficiency breathing bag microbial fermentation technology.
Food attractant is a feed additive commonly used in animal feed,with the aim of improving feed palatability,thereby increasing animal feed intake and improving production performance.Most of the research on food attractants and feed additives both domestically and internationally focuses on pigs and aquatic animals.There is relatively little research on the application of food attractants and feed additives in ruminant production.Therefore,this article briefly elaborates on the types and physico-chemical characteristics of food attractants,and preliminarily summarizes their application as feed additives in the production of ruminants,providing theoretical reference for practitioners.
