共查询到19条相似文献,搜索用时 62 毫秒
1.
2.
华北北部奶牛鲜粪便燃烧值变化规律的研究 总被引:1,自引:1,他引:0
本试验的目的是探讨华北北部奶牛鲜粪便燃烧值的变化情况及其影响因素和影响程度,并揭示其内在规律。本研究采用多因素再裂裂区组试验设计,对华北北部奶牛鲜粪便样品进行采样、测定、化验分析以及多重比较。结果显示,奶牛鲜粪便燃烧值变动范围为2.161~4.221MJ/kg,与水分含量呈负相关,与海拔、季节、养殖模式三因素无显著相关,而奶牛组别对其有一定影响。 相似文献
3.
采集华北北部不同阶段牛群和不同养殖模式夏秋季节奶牛鲜粪便的样品并检测,对测定数据进行方差分析。结果显示:夏秋季产奶牛组鲜粪便中CODcr含量均值为64.31kg/t,NH3-N含量均值为0.252kg/t;停奶育成组鲜粪便中CODcr含量均值为62.58kg/t,NH3-N含量均值为0.267kg/t。不同的养殖模式间CODcr、NH3-N含量稍有差异,但达不到极显著水平。奶牛鲜粪便pH值为弱碱性,范围在7~8之间,产奶组pH值低于停奶育成牛组。 相似文献
4.
奶牛粪便饲料资源化试验研究 总被引:2,自引:2,他引:2
随着我国规模化奶业的迅速发展.奶牛养殖产生的大量固体废弃物和有机废水已成为一些地区特别是大中城市郊区的主要污染源之一。统计结果显示.我国每年饲养各类畜禽170万头(只),畜禽粪便排放总量达到19亿t,其中奶牛粪便约为2.5亿t.而且相对集中。这对人类、其它生物以及奶牛自身生存环境的污染愈来愈严重。 相似文献
5.
为测定华北北部奶牛鲜粪便在夏秋季节污染地下水资源的主要物质NH3-N(氨氮)、CODcr(化学需氧量)的基础数值。本研究采用随机区组试验设计,通过对华北北部不同养殖模式下夏秋季节奶牛鲜粪便的采样测定,所测数据进行方差分析后,结果显示:夏秋季产奶牛组鲜粪便中CODcr含量均值为64.31 kg/t,NH3-N含量均值为0.252 kg/t;停奶育成组鲜粪便中CODcr含量均值为62.58 kg/t,NH3-N含量均值为0.267 kg/t。不同的养殖模式间CODcr、NH3-N含量稍有差异,但达不到极显著水平。奶牛鲜粪便pH值为弱碱性,范围在7~8之间,产奶组pH值低于停奶育成牛组。本文对解决鲜奶生产中奶牛鲜粪便对地下水资源严重污染难题,促进我国奶业可持续发展提供了一定的参考和借鉴。 相似文献
6.
7.
鲜柿子皮下脚料乃是加工柿饼的副产品,它不仅含有丰富的维生素A和胡萝卜素,而且还含有粗蛋白质和粗纤维。我市南部山区,是我市干鲜果生产基地,近年来,随着果品基地的发展,山区农户种植柿子树的株数逐年增加,每年可产鲜柿子达万吨左右。而当地农户用来加工柿饼下来的柿子皮上脚料,是一笔数量十分可观的畜禽优质多汁饲料。目前,当地农户除将柿子皮下脚料用来喂猪外,还有的养牛户开始用来饲喂泌乳奶牛,用以解决秋末冬初季节青绿多汁饲料不足的难题。笔者为了进一步验证鲜柿子皮下脚料饲喂泌乳奶牛的效果,从而为柿子产地农户开发利用好这一饲源提供依据,为此,于1999年10-11月间,我们在本市曹范镇,对养牛专业户饲养的泌乳奶牛进行了柿子皮下脚料饲喂对比效果试验研究,并取得了明显的促乳、增效的结果,现将该试验报告如下。 相似文献
8.
奶牛粪便饲料化处理工厂化生产技术研究 总被引:1,自引:1,他引:0
奶牛粪便饲料化处理工厂化生产技术研究,是指利用新鲜奶牛粪便进行饲料化处理工厂化生产的成套技术.它包括场地选择、生产规模的确定、基础设施建设、生产设备、生产工艺流程、技术路线和方法以及产业化开发中应注意的事项等,为该项产业的发展提供科学依据. 相似文献
9.
奶牛喂鲜啤酒糟应注意以下几点:①注意营养平衡。啤酒糟中钙、磷含量低,且比例不合适,因此饲喂时应注意补钙;②饲喂大量的湿啤酒糟会降低干物质的采食量,要掌握好饲喂量;③啤酒糟要贮存在牛场较干净的地方,最好贮存在塑料袋内或水泥地面上;④因啤酒糟是酿酒的副产物,其中富含微生物和水分,变质较快。饲喂时,一定要保证新鲜,同时每日每头可添加150 ̄200克小苏打。喂不完的啤酒糟要妥善保存,在夏季应在2 ̄3天内喂完,冬天可延至5 ̄7天;⑤饲喂量要适宜。每头每日喂量以7 ̄8千克为宜,生产性能可显著提高,一般不超过10千克(尤其是夏季),最高限量为… 相似文献
10.
11.
采用正交试验,将奶牛鲜粪便、煤粉、除臭吸附粘合剂原料均匀混合处理,对牛鲜粪便转化民用燃料的原料配方进行.了筛选研究。结果表明:含水量较高的奶牛鲜粪便最低利用比率可达40%,除臭吸附粘合剂最适合添加比率为11%,就可及时将牛鲜粪便中大量粪水和挥发性污染大气有害气体吸附固定住,也便于加工成多种形状的民用燃料加以再利用,具有强大的环保功能和鲜粪便循环再利用特点,对推动养牛业健康可持续发展具有重大意义。 相似文献
12.
13.
14.
肉牛粪便正常菌群研究 总被引:2,自引:0,他引:2
研究采用微生态学检测方法,对健康牛粪便中的正常菌群进行了定性,定量分析。结果证明;健康牛消化道中的类杆菌,双歧杆菌,乳杆菌,消化球菌为优势菌群,而肠杆菌,梭杆菌,优杆菌含量则较少。 相似文献
15.
The present study was undertaken to develop a novel, practical and simple procedure for enzyme‐linked immunosorbent assay of fecal estrone derivatives (estrone, estrone sulfate and estrone glucuronide) in dairy cows. Fecal solution, prepared by mixing feces with borate buffer, was applied directly to wells without extraction, and incubated with anti‐estrone antibody and horseradish peroxidase‐labeled estrone. Estrone sulfate was used as the standard. The sensitivity of the assay was estimated as 0.15 ng/mL (0.6 ng/g). The intra‐assay and inter‐assay coefficients of variation were 5.3–8.1% and 13.4–15.7%, respectively. The recovery rate was 78–102%. Only 4 h were needed to complete an assay to measure fecal estrone derivative concentrations. A significant positive correlation was established between plasma estrone sulfate concentrations and fecal estrone sulfate equivalent concentrations. When fecal estrone sulfate equivalent concentrations were measured in pregnant dairy cows, a gradual increase from day 150 of pregnancy, and subsequent drastic increases from day 240 to calving date were observed. These results suggest that the direct enzyme immunoassay procedure developed in the present study is a practical and reliable method for measuring fecal estrone derivative concentrations. 相似文献
16.
规模化猪场粪污处理技术研究进展 总被引:13,自引:0,他引:13
我国规模化猪场的兴起与粪污处理的相对滞后,使养殖业对环境的污染日益严重,畜牧场的污染问题已越来越受到人们的关注和重视。通过营养调控的方式可以提高动物对养分利用率,从而减少动物代谢废物的排泄量,但动物的粪污排泄量仍大大超出环境的承受能力,因此必须加强猪场废弃物和污水的综合治理。本文就国内外粪污处理技术和(粪)污水处理的工艺等方面研究近况作一综述。 相似文献
17.
将18头荷斯坦产奶牛随机分为试验6组,每组3头,试验Ⅰ~Ⅵ组奶牛依次饲喂不同精粗料比(精料:粗料)的TMR1(20∶80)、TMR2(30∶70)、TMR3(40∶60)、TMR4(50∶50)、TMR5(60∶40)、TMR6(70∶30)的日粮,探讨不同精粗料比TMR对奶牛粪尿、N、P的排泄量和CH4释放量的影响。结果,饲喂TMR4与饲喂TMR1和TMR6的奶牛相比,每头奶牛每年CH4释放量减少15.20Kg和89.84Kg;粪便排泄量减少1.37t和1.41t;N降低3.71kg和17.50kg;P减少2.59kg和4.07kg,比TMR1FCM提高10.54%(P〈0.05);乳脂率增加9.67%(P〈0.05);乳糖增加7.26%(P〈0.05),能减少奶牛对土壤水源及空气的污染,提高奶牛的生态效益和经济效益。 相似文献
18.
19.
The experiment was conducted to study the influence of Lactobacillus plantarum (LP) on production performance, egg and feces Salmonella enteric (SE) residues of SE-infected hens. 144 fifty-week-old Nongda No.3 hens were randomly allocated to 4 treatments with 4 replicates of 9 hens each. The hens in blank control and positive control groups were fed the basal diet, terramycin group, the basal diet with terramycin (5 mg/kg), LP group, the basal diet with Lactobacillus plantarum (109CFU/kg). The hens in positive control, terramycin and LP groups were oral inoculated with 1 mL SE (109CFU/mL) on 22 and 24 d. The experiment lasted for 50 d. Before being vaccinated, the production performance of each group showed no significant difference (P > 0.05); After being vaccinated, in early period, compared with blank control group, the average egg weight significantly decreased (P < 0.05), the feed-egg ratio significantly increased (P < 0.05), and the SE content of eggs and feces significantly increased (P < 0.05) in positive control group. Compared with positive control group, the average egg weight in terramycin group and LP group increased by 5.43% and 9.64% respectively (P < 0.05), while the feed-egg ratio decreased by 11.51% (P < 0.05) and 5.16% (P > 0.05) respectively. In later period, the feed-egg ratio in LP group decreased by 9.96% (P < 0.05), SE content of eggs and feces in LP group decreased by 43.17% and 23.93% respectively (P < 0.05). The production performance and E. coli, SE-carrying rates of eggs had no significant difference among the blank control, LP and terramycin groups (P > 0.05). The results indicated that, supplemented with Lactobacillus plantarum or terramycin could improve the production performance, reduce the SE content in eggs and feces, and improve the ability to resist infection in hens. Because Lactobacillus plantarum had the characteristics of no pollution and no residue, it could be used as a kind of ideal substitute for antibiotics in poultry production. 相似文献