共查询到20条相似文献，搜索用时 480 毫秒
1.
添加纤维素酶和糖蜜对大黍青贮饲料品质的影响 总被引：1，自引：0，他引：1
采用第一次刈割大黍为原料，设添加纤维素酶、糖蜜及对照的3个组，青贮60d后，评定其营养价值。结果：①常规成分：添加组pH较对照组显著降低；粗蛋白质在对照组、纤维素酶和糖蜜组的含量依次增加；粗纤维在添加组比对照组显著降低；挥发性碱基氮在纤维素酶组和糖密组分别比对照组显著、极显著降低。②细胞成分：细胞内容和在对照组显著低于两个添加组；OCW在对照组显著地高于两个添加组；Oa以添加纤维素酶组最低，糖蜜组显著高于纤维素酶组，与对照组间差异不显著；Ob以对照组最高，各组差异显著；ADF含量由于添加纤维素酶和糖蜜而降低；NDF由于添加纤维素酶和糖蜜分别显著1极显著降低。③有机酸：乳酸由于添加纤维素酶和糖蜜而显著地对照组；乙酸在各组间差异显著。④糖组成：甘露糖经青贮发酵，糖密组含量100.42μg/g青贮饲料，其他组为0；糖蜜组使果糖含量增加到472.14μg/g青贮饲料；葡萄糖在原料草为162μg/g，经过青贮，对照组被消耗，添加组含量分别增加5和25倍；半乳糖在对照组为0，添加组分别产生196.91、518.21μg/g青贮饲料，糖蜜组比纤维素酶组高近3倍；在添加组产生阿拉伯糖，以纤维素酶组最多，约为糖蜜组的3倍；木糖在纤维素酶和糖蜜组生成量增加，较对照组分别提高37倍和13倍。 相似文献
2.
《中国草食动物科学》2016,(1)
为探讨绿汁发酵液、糖蜜和纤维素酶对杂交狼尾草青贮饲料品质的影响。试验设对照组、绿汁发酵液组、糖蜜组及纤维素酶组,常温下青贮60 d后开窖取样,测定其发酵品质与化学成分。结果显示:相较于对照组,添加糖蜜可显著降低杂交狼尾草青贮饲料的p H值(P0.05),提高了乳酸、丙酸和干物质含量(P0.05);添加纤维素酶可显著降低杂交狼尾草青贮饲料的半纤维素、中性洗涤纤维和酸性洗涤纤维含量(P0.05),提高可溶性碳水化合物和粗蛋白含量(P0.05)。表明添加糖蜜和纤维素酶均可显著改善杂交狼尾草的青贮品质。 相似文献
3.
4.
不同添加剂对红三叶青贮品质的影响 总被引：2，自引：1，他引：1
本研究探讨了不同添加剂对红三叶(Trifolium pretense L.)青贮饲料发酵品质与化学成分的影响。实验处理分别是对照组、青宝Ⅱ号添加组、青宝Ⅱ号+纤维素酶添加组、甲酸添加组和糖蜜添加组。青贮45 d后打开取样,测定其发酵品质与化学成分。结果表明,与对照相比,添加剂处理可显著降低红三叶青贮饲料的pH值和非蛋白氮含量;青宝Ⅱ号、青宝Ⅱ号+纤维素酶处理可显著提高青贮饲料乳酸含量,青宝Ⅱ号+纤维素辅酶处理青贮饲料可溶性碳水化合物含量显著低于对照组;甲酸处理青贮饲料的可溶性碳水化合物含量显著高于对照组,乳酸含量和氨态氮含量显著低于对照组。通过利用添加剂可以改善红三叶青贮饲料的发酵品质和化学成分。 相似文献
5.
本研究旨在探讨添加不同酶制剂对全株玉米青贮发酵品质的影响,以蜡熟期刈割的全株玉米为材料,设对照组和6个处理组,处理组分别添加5 g/kg纤维素酶、木聚糖酶、果胶酶、α-半乳糖苷酶、β-甘露聚糖酶和β-葡聚糖酶,每组3个重复,青贮56 d后对全株玉米青贮饲料的感官评定、发酵品质、营养成分进行比较分析。结果显示:纤维素酶组、木聚糖酶组和β-葡聚糖酶组全株玉米青贮饲料的青贮效果较好;与对照组相比,纤维素酶组、木聚糖酶组和β-葡聚糖酶组可显著提高青贮饲料碳水化合物(WSC)和乳酸的含量(P>0.05),同时使青贮氨态氮/总氮显著降低(P<0.05),青贮发酵品质较好;添加纤维素酶的全株玉米青贮中干物质(DM)含量高于对照组和其他处理组,添加纤维素酶和α-半乳糖苷酶处理的粗蛋白质(CP)含量较高;添加纤维素酶的酸性洗涤纤维(ADF)和β-葡聚糖酶组青贮中性洗涤纤维(NDF)、ADF均显著低于对照组(P<0.05)。综上表明:纤维素酶、木聚糖酶和β-葡聚糖酶更适于用作全株玉米青贮饲料的添加剂。 相似文献
6.
本研究旨在探讨添加不同酶制剂对全株玉米青贮发酵品质的影响,以蜡熟期刈割的全株玉米为材料,设对照组和6个处理组,处理组分别添加5 g/kg纤维素酶、木聚糖酶、果胶酶、α-半乳糖苷酶、β-甘露聚糖酶和β-葡聚糖酶,每组3个重复,青贮56 d后对全株玉米青贮饲料的感官评定、发酵品质、营养成分进行比较分析。结果显示:纤维素酶组、木聚糖酶组和β-葡聚糖酶组全株玉米青贮饲料的青贮效果较好;与对照组相比,纤维素酶组、木聚糖酶组和β-葡聚糖酶组可显著提高青贮饲料碳水化合物(WSC)和乳酸的含量(P0.05),同时使青贮氨态氮/总氮显著降低(P0.05),青贮发酵品质较好;添加纤维素酶的全株玉米青贮中干物质(DM)含量高于对照组和其他处理组,添加纤维素酶和α-半乳糖苷酶处理的粗蛋白质(CP)含量较高;添加纤维素酶的酸性洗涤纤维(ADF)和β-葡聚糖酶组青贮中性洗涤纤维(NDF)、ADF均显著低于对照组(P0.05)。综上表明:纤维素酶、木聚糖酶和β-葡聚糖酶更适于用作全株玉米青贮饲料的添加剂。 相似文献
7.
纤维素酶对大黍青贮饲料品质的影响 总被引：4，自引：0，他引：4
采用首次刈割鲜大黍 ,经预干处理、用稻草调水分后 ,分别设对照和添加纤维素酶的 4个组 ,青贮 6 0d ,评定其营养价值。结果表明 :1.常规成分 :青贮饲料的pH ,添加纤维素酶情况下 ,预干处理显著低于添加稻草组 ,粗蛋白质为预干各组显著高于添加稻草组 ,粗纤维含量添加稻草组低于预干组 ,挥发性碱基氮含量由于纤维素酶的添加而显著降低 ;2 .细胞成分 :青贮饲料的细胞内容物含量由于稻草的添加而显著减少 ,添加纤维素酶显著提高细胞内容物含量 ,中性洗涤纤维随着稻草和纤维素酶的添加而显著降低 ,酸性洗涤纤维含量随着纤维素酶的添加而显著降低。 3 .短链脂肪酸 :青贮饲料中乳酸含量由于纤维素酶的添加而显著增加、稻草的添加而显著降低 ,乙酸含量在预干大黍情况下 ,由于纤维素酶添加而显著增加 ,而添加稻草的各组则相反 ,丙酸各组含量很低 ,预干组添加纤维素酶显著降低其含量 ,丁酸在添加稻草各组中 ,添加纤维素酶组显著增加 ,而预干各组则相反。 4.糖含量 :青贮饲料中添加纤维素酶增加了五、六碳单糖的含量 ,其中以预干大黍情况下增加幅度明显。 相似文献
8.
添加糖蜜对青稞秸秆和多年生黑麦草混合青贮发酵品质及营养价值的影响 总被引：1，自引：0，他引：1
试验在青稞秸秆与多年生黑麦草以6∶4混合的基础上,添加3%,4%和5%的糖蜜,旨在进一步改善混合青贮发酵品质和营养价值,为西藏地区青稞秸秆青贮利用提供理论依据。结果显示,青贮前14天,糖蜜添加组乳酸含量快速增加,pH值迅速下降。对照组pH值未能降至4.2以下,而糖蜜添加组均在4.0左右,乳酸、水溶性碳水化合物含量和乳酸/乙酸显著高于(P<0.05)对照组,氨态氮/总氮均低于对照组,且添加3%糖蜜已达到优质青贮饲料标准。青贮第60天糖蜜添加组有较高的粗蛋白含量,较低的中性洗涤纤维和酸性洗涤纤维含量,各组体外降解率均高于青贮材料。综合考虑,在青稞秸秆和黑麦草以6∶4混合的基础上添加3%的糖蜜可获得优质青贮饲料。 相似文献
9.
文章旨在探讨用不同添加剂对全株玉米型日粮化学成分、pH和发酵品质的影响。试验将常用的肉牛全混合日粮分成16份,每份1 kg,随机分为4组,每组4份,对照组不添加任何添加剂进行普通发酵,处理1组添加20 g/kg糖蜜,处理2组添加3 g/kg丙酸,处理3组为联合发酵组(20 g/kg糖蜜+3 g/kg丙酸),青贮6周后,收集样品进行后续分析。结果:糖蜜青贮组干物质、乳酸和乳酸菌含量较对照组分别显著提高11.94%、19.82%和23.20%(P<0.05),但处理组丁酸、中性洗涤纤维和酸性洗涤纤维含量显著低于对照组(P<0.05)。对照组全株玉米型日粮青贮7和14 d后pH显著降低(P<0.05)。青贮1 d和14 d,糖蜜组乳酸含量较对照组分别显著提高19.93%和71.77%(P<0.05),而青贮7 d,丙酸组乳酸含量较对照组显著提高17.42%(P<0.05)。青贮1、7和14 d,糖蜜组和丙酸组全株玉米型日粮氨氮与总氮比值均显著降低(P<0.05)。青贮1和7 d后糖蜜组全株玉米型日粮中乳酸菌含量均显著高于对照组(P<0.05),青贮14 d后,处理组乳酸菌数量较对照组分别显著降低了10.75%、16.05%和17.17%(P<0.05)。结论:在全株玉米型日粮中添加20 g/kg糖蜜可以提高青贮产物乳酸含量,同时改善发酵好氧稳定性,添加3 g/kg丙酸发酵虽然降低了青贮过程中乳酸产量,但提高了发酵产物水溶性碳水化合物含量。 相似文献
10.
试验旨在探讨不同添加剂对青贮稻草品质和有氧稳定性的影响。稻草青贮时,分别添加乳酸菌(L)、乳酸菌+糖蜜(LM)、乳酸菌+纤维素酶(LC)和乳酸菌+糖蜜+纤维素酶(LMC),乳酸菌、纤维素酶和糖蜜剂量分别为5×105 cfu/g、0.6 IU/g、20 mg/g,贮存90 d后开包检测。综合评定青贮稻草的青贮质量,测定常规营养成分,浸提液的pH值、氨态氮和有机酸的含量并测定稻草的有氧稳定性。试验结果:L组、LM组、LC组和LMC组的总综合评分显著高于对照组(P<0.05)。LC、LMC组的酸性洗涤纤维含量显著低于对照组(P<0.05),提高了剩余可溶性碳水化合物的含量。与对照组相比,各处理组均提高了乳酸的含量;LC和LMC组显著提高了乳酸的含量(P<0.05)。对照组的总有机酸含量显著低于LC和LMC组(P<0.05),但是和L、LM组差异不显著(P>0.05)。各组的有氧稳定性和有氧损失均无显著差异(P>0.05)。结果表明:添加乳酸菌,提高了乳酸的含量和综合评分;在乳酸菌的基础上,添加糖蜜或是与纤维素酶的组合,有利于提升发酵品质。 相似文献
11.
12.
Breed differences for weight (CW), height (CH), and condition score (CS) were estimated from records (n = 12,188) of 2- to 6-yr-old cows (n = 744) from Cycle IV of the U.S. Meat Animal Research Center's Germplasm Evaluation (GPE) Program. Cows were produced from mating Angus and Hereford dams to Angus, Hereford, Charolais, Shorthorn, Galloway, Longhorn, Nellore, Piedmontese, and Salers sires. Samples of Angus and Hereford sires were 1) reference sires born from 1962 through 1970 and 2) 1980s sires born in 1980 through 1987. The mixed model included cow age, season of measurement and their interactions, year of birth, pregnancy-lactation code (PL), and breedgroup as fixed effects for CW and CS. Analyses of weight adjusted for condition score included CS as a linear covariate. The model for CH excluded PL. Random effects were additive genetic and permanent environmental effects associated with the cow. Differences among breed groups were significant (P < 0.05) for all traits and were maintained through maturity with few interchanges in ranking. The order of F1 cows for weight was as follows: Charolais (506 to 635 kg for different ages), Shorthorn and Salers, reciprocal Hereford-Angus (HA) with 1980s sires, Nellore, HA with reference sires, Galloway, Piedmontese, and Longhorn (412 to 525 kg for different ages). Order for height was as follows: Nellore (136 to 140 cm), Charolais, Shorthorn, Salers, HA with 1980s sires, Piedmontese, Longhorn, Galloway and HA with reference sires (126 to 128 cm). Hereford and Angus cows with reference sires were generally lighter than those with 1980s sires. In general, breed differences for height followed those for weight except that F1 Nellore cows were tallest, which may in part be due to Bos taurus-Bos indicus heterosis for size. 相似文献
13.
In experiment 1, 6 pregnant mares received a concentrate that contained a trace mineral premix that provided 14.3 mg Cu, 40 mg Zn, 28 mg Fe, 28 mg Mn, 0.08 mg Co, 0.16 mg I, and 0.16 mg Se/kg concentrate (group A). Seven mares received the same concentrate plus 502 mg Zn and 127 mg Cu once daily (group B). No differences (P > .05) in foal growth data, or Cu, Zn, and Fe concentrations of mare milk, mare serum, or foal serum were observed. In experiment 2, 6 pregnant mares received the same concentrate as group A (group C), and 8 mares received the same concentrate fortified with 4× the trace mineral premix (group D). Group C mares had higher serum Zn concentration at 1 day (P < 0.01) and 56 days (P < 0.04). Group C mares had higher milk Fe concentration at 28 days (P < .01), and group D mares had higher milk Cu concentration at 56 days (P < .01). Group C foals had higher serum Cu concentration at 14 days (P < .03). The results from this study provide no evidence to indicate that supplementing late gestating and lactating mares with higher dietary trace mineral levels than those recommended currently by NRC has any influence on foal growth and development, or on the Cu, Zn, and Fe concentrations of the mare milk, mare serum, or foal serum. 相似文献
14.
Nadine Pa?lack Barbara Mainzer Monika Lahrssen-Wiederholt Helmut Schafft Richard Palavinskas Angele Breithaupt Jürgen Zentek 《Journal of veterinary science (Suw?n-si, Korea)》2015,16(1):57-66
This study was conducted to measure the concentrations of strontium (Sr), barium (Ba), cadmium (Cd), copper (Cu), zinc (Zn), manganese (Mn), chromium (Cr), antimony (Sb), selenium (Se), and lead (Pb) in canine liver, renal cortex, and renal medulla, and the association of these concentrations with age, gender, and occurrence of chronic kidney disease (CKD). Tissues from 50 dogs were analyzed using inductively coupled plasma mass spectrometry. Cu, Zn, and Mn levels were highest in the liver followed by the renal cortex and renal medulla. The highest Sr, Cd, and Se concentrations were measured in the renal cortex while lower levels were found in the renal medulla and liver. Female dogs had higher tissue concentrations of Sr (liver and renal medulla), Cd (liver), Zn (liver and renal cortex), Cr (liver, renal cortex, and renal medulla), and Pb (liver) than male animals. Except for Mn and Sb, age-dependent variations were observed for all element concentrations in the canine tissues. Hepatic Cd and Cr concentrations were higher in dogs with CKD. In conclusion, the present results provide new knowledge about the storage of specific elements in canine liver and kidneys, and can be considered important reference data for diagnostic methods and further investigations. 相似文献
15.
16.
K Reifenberg M Stahl U L?sch 《Zentralblatt für Veterin?rmedizin. Reihe B. Journal of veterinary medicine. Series B》1989,36(3):191-198
A simple two step procedure for the isolation of caprine, ovine, bovine, equine, canine, porcine and human peripheral blood granulocytes is described. After enrichment of granulocytes by centrifugation, contaminating erythrocytes are lysed hypotonically. Recovery, purity, and viability of the granulocyte suspensions are determined. FACScan analysis of the cell suspensions measuring cellular size by forward and sideward light scatter is compared with the corresponding analysis of whole blood leukocytes. Constituencies of the isolated cell suspensions and loss of granulocyte subpopulations through isolation procedure is discussed with regard to granulocyte function assays. 相似文献
17.
《饲料工业》2019,(18):54-58
应用电感耦合等离子-质谱技术(ICP-MS),建立饲料中钠、镁、铬、锰、铁、铜、锌、砷、硒、镉和铅等元素的测定方法。对饲料样品的前处理方法、仪器工作参数和11种元素标准曲线进行优化;并以加标回收、分析方法比对和重复测试说明方法的准确性和精密性。方法在0～1 000 ng/ml范围内线性良好,仪器检出限为0.557 7～5.072 ng/ml,具有良好的精密度,其回收率在88.1%～104.4%之间,相对标准偏差小于5.0%。同时与原子吸收和原子荧光方法进行比对,测定结果相近。所建立的方法简单、快速,可替代原子吸收和原子荧光方法测定饲料中的11种金属元素,为饲料的质量控制提供理想的元素分析方法。 相似文献
18.
《The Journal of small animal practice》1975,16(1-12):143-154
Circular excised skin wounds in the thoracic and metatarsal regions of the dog were studied. A similar sequence of events took place in the two regions although differences did occur due to the different reactions of the tissues which surrounded the wounds. None of the wound cavities became filled with exudate during the early stages of healing. In the thoracic wounds the cavities were largely filled by the swelling and inward movement of adipose tissue. Epithelium first grew on the wound surface in the sector of the wound that was situated in the direction of hair flow. The average time to complete epithelization was similar in both sets of wounds. A zone of alopecia developed around the wounds. 相似文献
19.