共查询到19条相似文献，搜索用时 218 毫秒
1.
肉用仔鸡日粮中添加蛋氨酸铜、锌和锰对粪便微量元素排放的研究 总被引：1，自引：0，他引：1
为了比较肉用仔鸡日粮中添加不同有机微量元素后粪便中铜、锰、锌、排放的影响,试验选择1日龄AA肉仔鸡,分为7个处理,对照组添加无机硫酸盐(锌50mg/kg;铜10mg/kg;锰50 mg/kg),试验组分别用Mintrex-Cu替代5 mg/kg或全部替代硫酸铜;以Min-trex-Zn代替20 mg/kg硫酸锌,以Mintrex-Mn代替20 mg/kg硫酸锰,或在对照组基础上添加20mg/kg的Mintrex-Mn或Mintrex-Zn.42日龄时,采用全收粪法收集粪样72h,用原子吸收分光光度计测定粪样中铜、锰、锌的含量.结果表明:Mintrex-Cu代替50%或100%硫酸铜,对粪便中铜、锌和锰的排泄量没有显著影响(P＞0.05),Mintrex-Zn/Mn替代40%无机锌、锰对锌、锰排泄量没有显著影响(P＞0.05).在基础日粮中额外添加20mg/kgMintrex-Zn/Mn显著提高了粪便中锌、锰的排泄量(P＜0.05),但添加20mg/kgMintrex-Mn降低铜排泄量20%以上(P＜0.05).研究说明,在基础日粮微量元素水平低于需要量的情况下,采用有机微量元素替代无机微量元素对粪便中微量元素排泄量的影响很小,额外添加有机微量元素则提高粪便微量元素的排泄. 相似文献
2.
文章研究了氨基酸微量元素螯合物替代饲粮中无机微量元素对肉鸡生产性能、饲粮养分代谢率和粪中微量元素含量的影响。选用300只0日龄广西快大型黄羽肉鸡(雌性),随机分为5组,每组6个重复,每个重复10只鸡,进行为期63d的饲养试验。对照组,饲喂基础饲粮,其Fe、Cu、Mn、Zn分别由硫酸亚铁、硫酸铜、硫酸锰和氧化锌提供,添加水平为Fe100mg/kg、Cu20mg/kg、Mn120mg/kg、Zn120mg/kg;试验组分别用12.5%、25.0%、37.5%和50.0%的蛋氨酸螯合铁、铜、锰、锌替代基础饲粮各相应无机微量元素的25%、50%、75%和100%。试验表明:与对照组相比,用不同比例蛋氨酸螯合物(铁、铜、锌、锰)替代相应无机盐可一定程度提高肉鸡的生产性能,改善饲粮养分利用率,提高养殖效益,降低粪中微量元素的排泄量,尤以37.5%的蛋氨酸微量元素螯合物替代饲粮中75%的相应无机微量元素效果良好。 相似文献
3.
22～42日龄肉鸡铜、铁、锌、锰不同用量组合的研究 总被引：1，自引：0，他引：1
本试验旨在研究饲粮中铜、铁、锌、锰含量对22~42日龄肉鸡生长性能和粪中铜、铁、锌、锰排泄量的影响,进而对微量元素的平衡模式进行探讨。选取940只1日龄爱拔益加(AA)肉公鸡,1~21日龄统一饲喂铜、铁、锌、锰含量分别为16.96、166.66、46.01、60.26 mg/kg的玉米-豆粕型饲粮。试验选用22日龄、体况良好、体重接近的AA肉公鸡900只,随机分为15组,每组6个重复,每个重复10只鸡。对照组饲喂基础饲粮,基础饲粮中铜、铁、锌、锰含量分别为8、125、40、60 mg/kg,试验组饲喂在基础饲粮中按照均匀设计原则添加2~8 mg/kg铜、10~35 mg/kg铁、10~40 mg/kg锌、15~60 mg/kg锰组成的14种试验饲粮。测定肉鸡试验期生长性能,并于38~42日龄时采集粪样测定铜、铁、锌、锰含量。结果表明:1)饲粮铜、铁、锌、锰含量在NRC推荐量至2倍NRC推荐量范围时,对22~42日龄肉鸡的平均日增重(ADG)和料重比(F/G)无显著影响(P0.05)。2)由最优解分析得出,粪中铜排泄量最低为23.11 mg/kg时,饲粮铜、铁、锌、锰含量分别为7.15、116.28、82.82、60.95 mg/kg;铁排泄量最低为438.34 mg/kg时,饲粮铜、铁、锌、锰含量分别为14.78、116.81、38.15、63.72 mg/kg;锌排泄量最低为102.60 mg/kg时,饲粮铜、铁、锌、锰含量分别为7.69、127.40、40.70、133.26 mg/kg;锰排泄量最低为159.37 mg/kg时,饲粮铜、铁、锌、锰含量分别为11.07、136.97、46.13、59.05 mg/kg;粪中铜、铁、锌、锰总排泄量最低为218.94 mg/kg时,饲粮铜、铁、锌、锰含量分别为7.36、125.74、38.23、62.76 mg/kg。综上所述,饲粮铜、铁、锌、锰含量在NRC推荐量至2倍NRC推荐量范围时对22~42日龄肉鸡的生长性能无显著影响;粪中铜、铁、锌、锰任一元素的排泄量均受饲粮中其他微量元素添加量的影响,且针对不同元素最低排泄量存在不同的最佳组合;饲粮铜、铁、锌、锰的含量分别为7.36、125.74、38.23、62.76 mg/kg时,能够满足肉鸡微量元素需要量,同时粪中铜、铁、锌、锰总排泄量最小。 相似文献
4.
文章旨在研究日粮添加有机源锌和锰替代无机锌和无机锰对蛋鸡生产性能、蛋壳和骨骼质量的影响。试验选择31周龄产蛋性能接近的罗曼粉壳蛋鸡616只,随机分为7组,每组4个重复,每个重复22只。基础日粮锌和锰含量分别为50和30 mg/kg,对照组饲喂基础日粮,分别添加氧化锌和硫酸锰(锌40 mg/kg,锰60 mg/kg)。处理组分别在基础日粮中添加20 mg/kg有机锌,30 mg/kg有机锰、20 mg/kg有机锌+30 mg/kg有机锰、40 mg/kg有机锌、60 mg/kg有机锰、40 mg/kg有机锌+60 mg/kg有机锰,上述含量均以相应元素计。试验共进行7周。结果显示:日粮用有机锌或锰替代50%或100%无机锌、锰对蛋鸡生产性能相关参数均无显著影响(P> 0.05)。对照组相比,有机锌或锰替代无机锌或锰的比例对32、46、60和74周龄蛋鸡蛋壳相对重量、蛋壳密度和蛋壳厚度均无显著影响(P> 0.05)。与对照组相比,30 mg/kg有机锰、20 mg/kg有机锌+30 mg/kg有机锰组的蛋壳强度显著提高(P <0.05)。40 mg/kg有机锌+60 mg/kg有机锰组较无机锌、锰组显著提高了60、74周龄及全期蛋壳强度(P <0.05)。日粮添加有机锌或锰对胫骨物理参数及胫骨和趾骨灰分含量均无显著影响。结论 :日粮添加有机锌、锰替代无机锌锰对蛋鸡产蛋性能和骨质量无影响,但可以降低蛋鸡由于年龄升高对蛋壳强度的负面影响。 相似文献
5.
《中国畜牧杂志》2020,(8)
本研究旨在探讨低钙磷低微量元素饲粮中添加植酸酶对生长性能、粪便排泄量、氮、磷、铜、锰、铁和锌排泄量的影响。选择132只1日龄ROSS 308雄性肉仔鸡,随机分为2组,每组6个重复笼,每个重复11只鸡。对照组饲喂基础日粮,试验组将基础日粮钙和磷水平分别降低0.10%和0.08%,微量元素添加水平降低50%,同时添加1 000 U/kg植酸酶。每日收集每个鸡笼的鸡粪样,测定新鲜粪样和干粪重量,测定各阶段氮、磷、铜、锰、铁和锌的排泄量。试验期35 d,分2个阶段(1～24日龄和25～35日龄)进行。结果表明:与对照组相比,试验组饲粮降低了肉鸡15～25日龄及全期的饲料转化率(P0.01),并降低了全期总干粪量、日干粪量和日干粪量/平均日采食量(P0.01);试验组饲粮降低了肉鸡胫骨钙(P0.01)和锌(P=0.07)含量,并降低粪便氮、磷、铜、锰、铁和锌的排泄量(P0.05或P0.01)。本试验条件下,低钙磷低微量元素饲粮中添加植酸酶改善了生产性能,降低了肉鸡粪便排泄量和粪便中氮、磷、铜、锰、铁和锌的排泄量。 相似文献
6.
有机与无机微量元素比例对肉仔鸡生长和组织生化指标的影响 总被引：2，自引：0，他引：2
本试验旨在研究有机与无机微量元素的不同比例对肉仔鸡生长性能、血液生化指标、血清和组织中微量元素含量及胫骨性能指标的影响。试验选用1日龄爱拔益加(AA)肉仔鸡400只,随机分成5组,每组8个重复,每个重复10只鸡。试验共设5个组,I组为对照组,以无机盐形式添加铁(Fe)100 mg/kg、铜(Cu)20 mg/kg、锰(Mn)120 mg/kg和锌(Zn)120 mg/kg;Ⅱ~Ⅴ组分别用30%、50%、70%和100%的有机微量元素(OTM)替代对照组相应的无机微量元素(ITM),各组元素的添加水平保持一致。试验期为42 d。结果表明:1)肉仔鸡饲粮中使用30%和50%的OTM替代ITM,4~6周龄和1~6周龄的料重比(F/G)显著低于对照组(P0.05);2)饲粮中添加50%OTM+50%ITM的肉仔鸡肝脏Cu、Mn含量以及超氧化物歧化酶(SOD)活性最高;3)肉仔鸡饲粮中添加70%OTM+30%ITM能显著提高血清中Fe的含量(P0.05)。综上所述,在肉仔鸡基础饲粮中用50%的有机微量元素替代相应比例的无机微量元素对肉仔鸡生长性能、微量元素沉积和SOD活性的提高有良好的效果。 相似文献
7.
试验研究了日粮中添加蛋氨酸锌(Zn-Met)对冬毛期蓝狐营养物质利用率及粪中微量元素的影响。试验选用150只体重相近的冬毛期蓝狐，随机分为5组，每组30只。对照组饲喂基础日粮，试验组在基础日粮中分别以Zn-Met形式添加30、60、90、120 mg/kg锌。结果表明：在日粮中添加适量蛋氨酸锌可使粗蛋白、钙、磷的消化率提高，其中B组（30 mg/kg）的添加水平效果最佳，差异显著(P<0.05)，对干物质、粗脂肪的消化率无显著性影响；蛋氨酸锌减少了微量元素铁、铜、锌、锰的排泄量，减少了环境的污染，与对照组相比，B组（30 mg/kg）和C组（60 mg/kg）效果差异显著(P<0.05)；综上所述，冬毛生长期蓝狐日粮中蛋氨酸锌的最适添加水平为30~60 mg/kg。 相似文献
8.
《黑龙江畜牧兽医》2014,(20)
为了探讨不同铜源对仔猪生长性能和血清微量元素含量的影响,试验选用体重20 kg左右的军牧1号断奶仔猪75头,随机分成A、B、C、D、E 5组,分别为基础日粮对照组(A组)、基础日粮+125 mg/kg硫酸铜组(B组)、基础日粮+250 mg/kg的硫酸铜组(C组)、基础日粮+125 mg/kg蛋氨酸铜组(D组)、基础日粮+250 mg/kg蛋氨酸铜组(E组),试验期为45 d。在试验第15,30,45天晨饲前空腹采血,分离血清用于测定有关微量元素含量;测定各组猪生长性能。结果表明:日粮添加铜可显著提高血清铜、锌含量(P0.05),对血清铁含量无显著影响(P0.05);125 mg/kg蛋氨酸铜和125 mg/kg硫酸铜的促生长效应较显著(P0.05),且有机铜优于无机铜。说明添加铜对仔猪生长有一定的意义,建议在基础日粮中添加铜125 mg/kg。 相似文献
9.
为了探讨不同铜源对仔猪生长性能和血清微量元素含量的影响,试验选用体重20 kg左右的军牧1号断奶仔猪75头,随机分成A、B、C、D、E 5组,分别为基础日粮对照组（A组）、基础日粮＋125 mg/kg硫酸铜组（B组）、基础日粮＋250 mg/kg的硫酸铜组（C组）、基础日粮＋125 mg/kg蛋氨酸铜组（D组）、基础日粮＋250 mg/kg蛋氨酸铜组（E组）,试验期为45 d。在试验第15,30,45天晨饲前空腹采血,分离血清用于测定有关微量元素含量;测定各组猪生长性能。结果表明：日粮添加铜可显著提高血清铜、锌含量（P〈0.05）,对血清铁含量无显著影响（P〉0.05）;125 mg/kg蛋氨酸铜和125 mg/kg硫酸铜的促生长效应较显著（P〈0.05）,且有机铜优于无机铜。说明添加铜对仔猪生长有一定的意义,建议在基础日粮中添加铜125 mg/kg。 相似文献
10.
《动物营养学报》2015,(9)
本试验旨在研究羟基蛋氨酸螯合锰/锌替代产蛋鸡饲粮中无机锰/锌对产蛋鸡蛋壳品质及微量元素沉积的影响。试验采用单因子设计,共设3个组,羟基蛋氨酸螯合锰/锌分别替代基础饲粮中相应无机锰、锌水平的0、50%和100%。每个组6个重复,每个重复10只60周龄、体重相近的海兰褐蛋鸡,试验期60d,分为2个阶段。结果表明:1)饲粮中不同添加形态的微量元素对产蛋率、平均蛋重、日产蛋量、料蛋比和破蛋率无显著影响(P0.05);2)使用有机微量元素,在减少微量元素的添加量情况下,不影响蛋品质(P0.05);3)饲粮中添加有机微量元素可以显著减少粪便中微量元素铜、锌和锰的排放量(P0.05)。由此可见,在蛋鸡产蛋后期使用有机微量元素有提高产蛋率、日产蛋量和降低料蛋比的趋势;使用有机微量元素在减少微量元素使用量的情况下,降低了粪中微量元素的排放量。 相似文献
11.
微量元素对黑麦草产量和品质的影响 总被引：5，自引：1，他引：4
在N、P、K肥料的基础上,采用Fe、Cu、Zn、Mn、B、Mo 6种微肥对黑麦草Lolium multiflorum进行叶面喷施,研究不同用量对黑麦草产量和品质的影响。试验表明：喷施Fe 0.05%、Cu 0.07%、Zn 0.40%、Mn 0.10%、B 0.60% 和Mo 0.20%与对照组相比增产差异显著（P＜0.05）。适度的Fe、Cu、Mn、B和Mo能提高黑麦草的粗蛋白、粗纤维和粗灰分含量,粗蛋白提高3.72%～6.67%,无氮浸出物含量呈降低趋势,喷施Zn肥降低了粗蛋白含量,喷施B肥提高了粗脂肪含量。黑麦草中Cu、B、Mo的含量随喷肥量的提高而增加,喷施Cu 0.1%、B 1%和Mo 0.3%时,黑麦草中的含量最高,与对照组差异显著（P＜0.05）。喷施Zn 0.40%、Mn 0.1%、Fe 0.05%时牧草中相应的微量元素最高,与对照组差异显著（P＜0.05）。 相似文献
12.
Methodology for assessing zinc bioavailability: efficacy estimates for zinc-methionine, zinc sulfate, and zinc oxide. 总被引：12，自引：0，他引：12
The bioavailability of zinc-methionine (ZnMET) was compared to that of feed-grade ZnSO4.H2O using three different diets: purified (crystalline amino acid [AA]), semipurified (soy isolate), and complex (corn-soybean [C-SBM]) diet. With the Zn-deficient purified or semipurified diet, weight gain and tibia Zn responded linearly to both ZnSO4.H2O and ZnMET supplementation. Common-intercept, multiple linear regression indicated differences in Zn bioavailability between ZnMET and ZnSO4.H2O for both diets as indicated by bone Zn. With the ZnSO4.H2O standard set at 100%, bioavailability of Zn from ZnMET was 117% (P less than .05) in the AA diet and 177% (P less than .01) in the soy isolate diet. The ZnMET was also compared to ZnSO4.H2O in a C-SBM diet containing 117 mg of Zn/kg. When high levels of Zn were added to this diet (0, 250, 500, and 750 mg/kg of supplemental Zn), consistent tissue Zn responses did not occur beyond the first increment. Addition of lower levels of supplemental Zn (0, 5, 10, 20, 30, 40 and 50 mg/kg) to a Zn-unsupplemented C-SBM basal diet (45 mg/kg of Zn), however, resulted in a broken-line, two-slope response in tibia Zn for both ZnMET and ZnSO4.H2O. Inflection points occurred at 60 and 54 mg of Zn/kg of diet for ZnSO4.H2O and ZnMET, respectively. The ratio of slopes (ZnMET:ZnSO4.H2O) below the inflection points was 206% (P less than .01), indicating that Zn was considerably more bioavailable in ZnMET than in ZnSO4.H2O for chicks consuming C-SBM diets. When feed-grade ZnO was compared to feed-grade ZnSO4.H2O in chicks consuming C-SBM diets, bone Zn slopes below the respective inflection points indicated that Zn was 61% bioavailable in ZnO relative to ZnSO4.H2O. 相似文献
13.
基于探讨适合桑黄酮类化合物合成的优化培养条件,以桑品种陕桑305为材料,研究了培养基成分及其添加量对桑树试管苗黄酮类化合物含量的影响。结果表明:当培养基中果糖的质量浓度为30g/L,氮元素浓度为60.02mmol/L,氨态氮与硝态氮物质的量比为0.3165,MnSO4·4H2O和ZnSO4·7H2O的质量浓度分别为11.15、4.3mg/L,激素质量浓度为0.1mg/LNAA(α-萘乙酸)、0.5mg/L6-BA(6-苄氨基嘌呤)、0.5mg/LKT(激动素)时,有利于桑树试管苗叶片中黄酮类化合物的合成;Mn2+和Zn2+浓度能影响苯丙氨酸解氨酶活性,当培养基中的MnSO4·4H2O和ZnSO4·7H2O分别为11.15、4.3mg/L时,酶活性最高。 相似文献
14.
Zinc bioavailability in feed-grade sources of zinc 总被引：4，自引：0，他引：4
Chick bioassays were used to assess bioavailability of zinc (Zn) from inorganic Zn sources. A soy isolate-dextrose diet containing 13 mg Zn/kg diet was supplemented with feed-grade sources of ZnSO4.H2O (ZnSO4) or ZnO and fed for 2 wk after a 7-d Zn-depletion protest period. Bioavailability of Zn in ZnO relative to ZnSO4 (set at 100%) was determined by multiple regression slope-ratio methodology, using both growth and tibia Zn accumulation in chicks fed graded levels of ZnO and ZnSO4. Linear responses for gain and tibia Zn occurred at dietary Zn levels (ZnSO4.7H2O) between 13 mg/kg (basal) and 33 mg/kg (gain) or 53 mg/kg (total tibia Zn). Therefore, two bioavailability assays were conducted using supplemental Zn levels of 0, 7.5 and 15 mg/kg from each Zn source. When weight gain was regressed on supplemental Zn intake, bioavailability of Zn in ZnO was only 61.2% (P less than .01) that of ZnSO4. When total tibia Zn was regressed on supplemental Zn intake, bioavailability of Zn compared with ZnSO4 (set at 100.0%) was 44.1% (P less than .001) for ZnO. With chicks fed soy-based diets, bioavailability of Zn from ZnO was less than that of ZnSO4. 相似文献
15.
Effects of breed (Angus vs Simmental) and copper and zinc source on mineral status of steers fed high dietary iron 总被引：1，自引：0，他引：1
Forty-four Angus (n = 24) and Simmental (n = 20) steers, averaging 301 kg initially, were used to determine the effects of breed and Cu and Zn source (SO4 or proteinate (Prot) form) on Cu and Zn status of steers fed high dietary iron (Fe). Steers were stratified by weight within breed and randomly assigned to treatments. Treatments consisted of: 1) CuSO4 + ZnSO4 ,2) CuSO4 + ZnProt, 3) CuProt + ZnSO4, and 4) CuProt + ZnProt. Copper and Zn sources were added to provide 5 mg Cu and 25 mg supplemental Zn/kg DM. All steers were individually fed a corn silage-based diet supplemented with 1,000 mg Fe (from FeSO4)/kg DM. Liver biopsy samples were obtained at the beginning and end of the 149-d study. Serum samples were collected initially and at 28-d intervals for determination of ceruloplasmin activity and Zn and Cu concentrations. Copper and Zn source did not affect performance, serum or liver Cu and Zn concentrations, or ceruloplasmin activity. Copper status decreased (P < 0.01) in all steers with time, and increasing the level of supplemental Cu from 5 to 10 mg/kg DM on d 84 did not prevent further drops in serum Cu and ceruloplasmin. Simmental steers had lower (P < 0.05) serum and liver Cu concentrations, and serum ceruloplasmin activity throughout the study. These results indicate that neither CuSO4 nor CuProt were effective at the supplemental concentrations evaluated in alleviating the adverse effect of high Fe on Cu status. Simmental steers had lower Cu status than Angus, suggesting a higher Cu requirement. 相似文献
16.
Shelton NW Tokach MD Nelssen JL Goodband RD Dritz SS DeRouchey JM Hill GM 《Journal of animal science》2011,89(8):2440-2451
Three experiments were conducted to evaluate the effects of increasing dietary Cu and Zn on weanling pig performance. Diets were fed in 2 phases: phase 1 from d 0 to 14 postweaning and phase 2 from d 14 to 28 in Exp. 1 and 2 and d 14 to 42 in Exp. 3. The trace mineral premix, included in all diets, provided 165 mg/kg of Zn from ZnSO(4) and 16.5 mg/kg of Cu from CuSO(4). In Exp. 1, treatments were arranged in a 2 × 3 factorial with main effects of added Cu from tri-basic copper chloride (TBCC; 0 or 150 mg/kg) and added Zn from ZnO (0, 1,500, or 3,000 mg/kg from d 0 to 14 and 0, 1,000, or 2,000 mg/kg from d 14 to 28). No Cu × Zn interactions were observed (P > 0.10). Adding TBCC or Zn increased (P < 0.05) ADG and ADFI during each phase. In Exp. 2, treatments were arranged in a 2 × 3 factorial with main effects of added Zn from ZnO (0 or 3,000 mg/kg from d 0 to 14 and 0 or 2,000 mg/kg from d 14 to 28) and Cu (control, 125 mg/kg of Cu from TBCC, or 125 mg/kg of Cu from CuSO(4)). No Cu × Zn interactions (P > 0.10) were observed for any performance data. Adding ZnO improved (P < 0.02) ADG and ADFI from d 0 to 14 and overall. From d 0 to 28, supplementing CuSO(4) increased (P < 0.02) ADG, ADFI, and G:F, and TBCC improved (P = 0.006) ADG. In Exp. 3, the 6 dietary treatments were arranged in a 2 × 2 factorial with main effects of added Cu from CuSO(4) (0 or 125 mg/kg) and added Zn from ZnO (0 or 3,000 mg/kg from d 0 to 14 and 0 or 2,000 mg/kg from d 14 to 42). The final 2 treatments were feeding added ZnO alone or in combination with CuSO(4) from d 0 to 14 and adding CuSO(4) from d 14 to 42. Adding ZnO increased (P < 0.04) ADG, ADFI, and G:F from d 0 to 14 and ADG from d 0 to 42. Dietary CuSO(4) increased (P < 0.004) ADG and ADFI from d 14 to 42 and d 0 to 42. From d 28 to 42, a trend for a Cu × Zn interaction was observed (P = 0.06) for ADG. This interaction was reflective of the numeric decrease in ADG for pigs when Cu and Zn were used in combination compared with each used alone. Also, numerical advantages were observed when supplementing Zn from d 0 to 14 and Cu from d 14 to 42 compared with all other Cu and Zn regimens. These 3 experiments show the advantages of including both Cu and Zn in the diet for 28 d postweaning; however, as evident in Exp. 3, when 3,000 mg/kg of Zn was added early and 125 mg/kg of Cu was added late, performance was similar or numerically greater than when both were used for 42 d. 相似文献
17.
用离子化火焰原子吸收光谱仪测定药用矿物阳起石中Zn、Cu、Fe、Mn 4种主要微量元素的含量,通过SPSS统计软件对结果进行分析,并对其药理作用进行探究。结果表明,所采阳起石样品中Zn、Cu、Fe、Mn 4种元素平均含量分别为1.041、8.358、16.584、1.288 mg/kg。Fe元素含量最高,差异极显著;Cu元素次之,差异显著;Zn和Mn元素含量最低,差异不显著。 相似文献
18.
为评价肉仔鸡日粮中不同形态锰源的相对生物学利用率,采用2×5完全随机试验设计,选择玉米—豆粕型基础日粮(锰含量为37.66mg/kg),添加2种锰源(复合氨基酸螯合锰和硫酸锰)和5个锰添加水平(0、45、90、130、180mg/kg),构成10个日粮处理组,将540只1日龄健康艾维茵肉仔鸡随机分为10个处理组,每个处理组3个重复,每个重复18只鸡,公母各半,开展为期42d的肉仔鸡饲养试验。分别于21、42日龄时,取各组试验鸡的肝脏、肾脏及左侧胫骨,采用原子吸收分光光度计测定肝脏、肾脏组织以及胫骨的锰浓度。将各组织锰含量与日粮锰进食量进行多元线性回归方程拟合,采用斜率比法计算复合氨基酸锰相对无机硫酸锰的生物学利用率。结果表明,饲粮中添加锰可显著增加肝脏、肾脏和胫骨锰含量,尤以胫骨锰含量反映最敏感,呈明显的剂量效应(P<0.01);相比肝脏锰和肾脏锰含量,21日龄胫骨锰含量可作为评价锰利用率的有效指标;采用斜率比法估测的复合氨基酸螯合锰的相对生物学利用率要略高于饲料级硫酸锰。研究结果为有机锰添加剂在禽生产上的合理应用提供了基础数据。 相似文献
19.
1. A 56-d experiment was conducted to study the comparative influence of organic and inorganic dietary copper (Cu) sources on growth, blood characteristics and copper accumulation in organs of broilers. 2. A total of 480 Arbor-Acre unsexed broilers were fed on diets containing copper sulphate (CuSO(4)) or copper proteinate (Cu Pro) at concentrations of 50, 100 or 150 mg/kg of Cu supplementation. The birds were given a broiler starter diet from 1-28 d and a broiler finisher diet from 29-56 d which contained 30·8 mg/kg and 41·1 mg/kg basal copper concentration respectively. Growth performance, blood characteristics and Cu accumulation in organs of the broilers were measured. 3. At 28 d, Cu Pro-fed birds had improved feed conversion ratio compared with CuSO(4). At 56 d, birds fed on Cu Pro diets had significantly greater body weight than CuSO(4)-fed birds. Birds fed on CuSO(4) supplemented diets had significantly better feed conversion efficiency. Feed consumptions for the two Cu sources were not significantly different. At no stage did the concentration of added Cu affect the productive traits measured. 4. Cu Pro supplementation increased haemoglobin concentration but reduced plasma triglyceride and plasma cholesterol. Plasma cholesterol decreased as Cu concentration increased. 5. There was a greater accumulation of Cu in the blood, heart, lung, liver and bone of broilers fed on Cu Pro than in those receiving CuSO(4). The liver Cu concentration increased as dietary Cu concentration increased. 6. Cu Pro was more effective in promoting growth and reducing blood cholesterol, and was more bio-available in the organs of broilers. 相似文献