固态发酵在真菌除草剂规模化生产中的应用及展望     

杨爽  张建萍  段桂芳  余柳青 《山东农业科学》2011,(4):82-85

本文就固态发酵在真菌除草剂规模化生产中的应用现状、实例及如何控制发酵条件进行了综述,并对其应用前景进行了展望。  相似文献   

利用甜高粱秸秆汁产单细胞蛋白的分批补料发酵研究     

庞会忠  叶亚健  王飞  程新  吴晓玉  李昆太 《中国饲料》2012,(3):19-21

本文以甜高粱秸秆汁为主要的发酵原料,对热带假丝酵母SG-1在15-L罐上产单细胞蛋白(SCP)的分批补料发酵过程进行研究。首先对分批发酵模式下的菌体代谢过程变化进行研究。研究发现,接种后菌体快速进入繁殖阶段,但是总糖在12 h处于耗竭状态,使得菌体量和SCP产量过早的在18 h就达到峰值。基于此,在15-L罐上建立了热带假丝酵母SG-1产SCP的分批补料发酵模式。结果表明:菌体代谢因基质的补加而得到进一步的延续,放罐时(42 h)其菌体干重和SCP产量分别达19.86 g/L和9.93 g/L,显著高于分批发酵模式的10.45 g/L和4.70 g/L。  相似文献   

海南景观水体水生植物调查及试验     

陈生香  唐树梅 《热带作物学报》2012,32(11):53-56

对海南多个景观水体的水生植物进行调查研究，并采用浮床栽培技术对多种植物进行水培试验，结果植株在污染水体培养的植物长势和景观效果优于自来水体，富贵竹、闭鞘姜、黄花蔺等植物在浮床栽培技术中具有较高的观赏价值，可运用于热带地区水体景观中。  相似文献   

海南景观水体水生植物调查及试验     

陈生香  唐树梅 《热带农业科学》2012,32(11):53-56,59

对海南多个景观水体的水生植物进行调查研究,并采用浮床栽培技术对多种植物进行水培试验,结果植株在污染水体培养的植物长势和景观效果优于自来水体,富贵竹、闭鞘姜、黄花蔺等植物在浮床栽培技术中具有较高的观赏价值,可运用于热带地区水体景观中。  相似文献   

Strawberry Production in Central Europe     

《International Journal of Fruit Science》2013,13(1):91-105

Abstract

This paper focuses on the cropping systems in central European countries such as Belgium, The Netherlands, UK, Ireland, Germany, Switzerland and the northern part of France and Italy. During the last decade there has been a consistent increase in programmed “out-of-season” strawberry production in several central European countries. This is being achieved in part, by using cultivars with different cropping seasons, but mainly by sequential planting of cold-stored plants and by growing strawberries in greenhouses and plastic tunnels. These methods have made it possible to extend the strawberry production for 11 months, from the end of February until mid January in central European countries with moderate climates.  相似文献   

Effect of hay type on cecal and fecal microbiome and fermentation parameters in horses     

Rachel J Sorensen  James S Drouillard  Teresa L Douthit  Qinghong Ran  Douglas G Marthaler  Qing Kang  Christopher I Vahl  James M Lattimer 《Journal of animal science》2021,99(1)

The effect of hay type on the microbiome of the equine gastrointestinal tract is relatively unexplored. Our objective was to characterize the cecal and fecal microbiome of mature horses consuming alfalfa or Smooth Bromegrass (brome) hay. Six cecally cannulated horses were used in a split-plot design run as a crossover in two periods. The whole plot treatment was ad libitum access to brome or alfalfa hay fed over two 21-d acclimation periods with subplots of sampling location (cecum and rectum) and sampling hour. Each acclimation period was followed by a 24-h collection period where cecal and fecal samples were collected every 3 h for analysis of pH and volatile fatty acids (VFA). Fecal and cecal samples were pooled and sent to a commercial lab (MR DNA, Shallowater, TX) for the amplification of the V4 region of the 16S rRNA gene and sequenced using Illumina HiSeq. The main effects of hay on VFA, pH, and taxonomic abundances were analyzed using the MIXED procedure of SAS 9.4 with fixed effects of hay, hour, location, period, and all possible interactions and random effect of horse. Alpha and beta diversities were analyzed using the R Dame package. Horses fed alfalfa had greater fecal than cecal pH (P ≤ 0.05), whereas horses fed brome had greater cecal than fecal pH (P ≤ 0.05). Regardless of hay type, total VFA concentrations were greater (P ≤ 0.05) in the cecum than in feces, and alfalfa resulted in greater (P ≤ 0.05) VFA concentrations than brome in both sampling locations. Alpha diversity was greater (P ≤ 0.05) in fecal compared with cecal samples. Microbial community structure within each sampling location and hay type differed from one another (P ≤ 0.05). Bacteroidetes were greater (P ≤ 0.05) in the cecum compared with the rectum, regardless of hay type. Firmicutes and Firmicutes:Bacteroidetes were greater (P ≤ 0.05) in the feces compared with cecal samples of alfalfa-fed horses. In all, fermentation parameters and bacterial abundances were impacted by hay type and sampling location in the hindgut.  相似文献   

构树的营养价值及其在畜禽生产中的应用研究进展     

王为栋  孙海娟  张春宝 《饲料研究》2021,(3):152-154

构树含有丰富的粗蛋白、粗脂肪、氨基酸等多种营养物质,有抗氧化、抗菌消炎的功能。构树在畜禽养殖中的应用有助于解决我国的"人畜争粮"问题,有望成为一种具有广泛应用前景的蛋白质饲料。文章综述构树的营养成分、生物发酵技术以及在猪、家禽、反刍动物养殖中的应用研究进展。  相似文献   

Nutritive value of sorghum silage for sheep     

Ehsan Sabertanha  Yousef Rouzbehan  Hassan Fazaeli  Javad Rezaei 《Journal of animal physiology and animal nutrition》2021,105(6):1034-1045

This study compared ensiled sorghum (ES) from two varieties (first and second cuts) with corn silage (CS) for chemical analysis, total-tract nutrient digestibility, ruminal variables and blood biochemistry metabolites in sheep. Five experimental silages representing first cut ES var. Pegah (PS1), second cut ES var. Pegah (PS2), first cut ES var. Speedfeed (SS1), second cut ES var. Speedfeed (SS2) and CS were assessed for chemical analysis, silage fermentation and anti-quality compounds. Diets consisted of lucerne hay, silage and a premix (at the ratio of 53.5:46:0.5 on a dry matter [DM] basis). Feed consumption, total-tract nutrient digestibility, microbial nitrogen supply (MNS), ruminal variables and blood biochemistry metabolites were determined in a Latin square design of five periods with five male sheep. Compared to sorghum, CS had lower (p < 0.01) concentrations of ash, water-soluble carbohydrates and crude protein, but higher starch, lignin (sa), non-structural carbohydrates and apparent nutrient digestibility. The measurements of pH, lactic acid, NH₃-N and volatile fatty acids (VFA) confirmed that all silages were well-preserved. The anti-quality compound levels in the silages were below the safe limits for ruminants. No differences were observed in feed consumption (p > 0.05) and total-tract digestibility of DM and nutrients (p > 0.05). Rumen pH, NH₃-N, VFA concentrations and acetate to propionate ratio showed no difference among treatments (p > 0.05). Sheep fed on sorghum silage showed a decrease (p < 0.01) in total protozoa, and particularly in the Entodiniae population. There were no differences in cellulolytic bacteria counts (p > 0.05) among treatments. Urinary N, MNS and blood biochemistry metabolites showed no difference among treatments (p > 0.05). Silages from both cuts of sorghum had comparable total-tract nutrient digestibility to CS, therefore, these varieties could be used as a more drought resilient silage source in the feeding of sheep.  相似文献   

不同氨基酸对泰万菌素发酵影响的研究     

刘杨  张萍  牛春 《中国兽药杂志》2021,55(1):47-51

通过单因素试验考察了泰万菌素发酵培养基中不同氨基酸种类对其发酵过程的影响,并利用正交试验对发酵培养基中3种主要氨基酸的用量配比进行了优化,结果表明发酵培养基加入0.2%亮氨酸、0.1%色氨酸、0.1%甘氨酸对泰万菌素发酵转化率影响显著,发酵摇瓶效价从14000μ/mL提高到18000μ/mL,效价提高了28.5%,完成了对泰万菌素提高发酵转化率和发酵单位的目的,并为大规模商业化生产泰万菌素奠定了良好的基础。  相似文献   

日粮添加不同油脂原料对肉牛生长性能、养分消化及瘤胃发酵性能的影响     

刘秋云  曲平安 《中国饲料》2021,1(8):29-32

文章旨在探讨日粮添加不同油脂原料对肉牛生长性能、养分消化及瘤胃发酵性能的影响。试验选择平均初始体重（296±32.33）kg、带有瘤胃瘘管的肉牛48头,随机分为4组,每组4个重复,每个重复3头。对照组肉牛饲喂不含油脂的日粮,处理组肉牛分别饲喂含有5%棕榈油、亚麻油和包被脂肪的日粮。在为期10周的饲养试验后测定相关指标。结果：对照组与包被脂肪组干物质、有机物和氮摄入量及干物质、有机物表观消化率显著高于棕榈油和亚麻油组（P＜0.05）,而包被脂肪组与亚麻油组粗脂肪摄入量显著高于对照组和棕榈油组（P＜0.05）。对照组粗脂肪表观消化率较其他组分别显著降低31.94%、32.17%和33.56%（P＜0.05）,而亚麻油组中性洗涤纤维表观消化率较其他组分别显著降低18.61%、17.10%和19.68%（P＜0.05）。包被脂肪组瘤胃不饱和脂肪酸流量较对照组和棕榈油组分别显著提高152.26%和240%（P＜0.05）。对照组与包被脂肪组瘤胃氨氮浓度显著高于棕榈油组和亚麻油组（P＜0.05）。结论：包被脂肪降低了脂肪对瘤胃发酵的影响,其对瘤胃饱和脂肪酸流量的影响与亚麻油相似,但棕榈油降低了瘤胃氨氮浓度,不能有效向瘤胃提供不饱和脂肪酸。 [关键词]油脂原料|肉牛|生长性能|养分消化|瘤胃发酵  相似文献