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1.
日粮中添加黄秋葵茎叶粉对大麻花鸡皮肤及脂肪着色的影响 总被引：8，自引：2，他引：6
liuguodao@scuta.edu.cn 《中国农学通报》2006,22(3):11-11
采用单因子试验设计,选取50日龄体重和脚胫颜色相近的大麻花鸡288只,随机分为6个试验处理,每个处理设置3个重复,每个重复16只鸡,试验组为占日粮2%、3%、4%、5%的黄秋葵,对照组为不添加黄秋葵组、添加加丽红和加丽黄的混合组,试验共进行42d。研究结果表明:日粮添加3%、4%、5%黄秋葵试验组显著提高了试验鸡皮肤和脂肪的着色效果(p<0.05),而添加2%黄秋葵试验组和2个对照组的着色效果较差;试验组鸡从开始摄取含黄秋葵的饲料到皮肤显现较黄颜色,需要3周左右,4周后达到比较理想的程度,各个部位着色程度大小是:脚胫>胸部>臀部>脂肪>背部;日粮添加黄秋葵茎叶粉对试验鸡的日增重和料重比无显著影响(p>0.05)。 相似文献
2.
黄芪多糖、益生菌合生元对雏鸡生长和免疫的作用 总被引：20，自引：1，他引：19
240只商品代海兰蛋雏鸡被用来研究黄芪多糖(Astragalus Polysaccharide, APS)和益生菌(Profitable Microbe, PM)对雏鸡生长和免疫的促进作用。鸡只按体重随机分为4组,每组6个重复笼,每重复笼10只。试验为期6周,自由采食和饮水。第1组为空白对照组,2、3、4组为试验组,在基础日粮基础上分别添加220mg/kg黄芪多糖、4×107cfu/g益生菌剂以及220mg/kg黄芪多糖+4×107cfu/g益生菌剂。试验鸡于每周末称体重和耗料量,计算料肉比;分别于第3周和6周末心脏采血制备血清并称称脾脏和法式囊重量。试验结果：黄芪多糖、益生菌和合生元均能显著提高雏鸡周增重(p<0.05),减少饲料消耗(p<0.05),降低料肉比(全期分别降低13.96%、15.26%和12.34%,p<0.05),但未发现合生元组雏鸡生产性能与黄芪多糖和益生菌组有明显差异(p>0.05);试验组雏鸡血清总蛋白含量较对照组升高(p>0.05),葡萄糖则降低(p>0.05);法式囊和脾脏指数合生元组均显著高于空白组、黄芪多糖组和益生菌组(p<0.05);试验组雏鸡血清新城疫抗体效价均较空白对照组升高(p<0.05),且以合生元对新城疫抗体效价的提高优于黄芪多糖和益生菌。 相似文献
3.
试验旨在研究用小麦完全代替日粮中的玉米后饲喂产蛋鸡的效果,以评估小麦用作蛋鸡能量饲料的可行性。试验采用对比试验设计,选用尼克红蛋鸡180只,随机分为两个组,每组3个重复,每个重复30只蛋鸡。一组为对照组,另一组为处理组,分别饲喂玉米——豆粕型日粮和小麦——豆粕型日粮。结果表明,在蛋鸡日粮中用小麦完全代替玉米后,产蛋率降低1.9%,产蛋量降低1.06枚/只,异软蛋率提高0.09%,采食量提高1.04(g/只·d),料蛋比提高0.09,均差异显著（p<0.05）;破蛋率提高0.33%,平均蛋重降低0.54%,但差异不显著(p>0.05)。从营养物质的消化率考虑,小麦型日粮表观能量的利用率和蛋白质的表观消化率与玉米组相比均降低了,但均差异不显著(p>0.05)。从经济效益考虑,小麦型日粮的饲料成本虽然降低了,但其他指标均不如玉米组,且产蛋成本增加了0.01元/kg。 相似文献
4.
复合酶制剂在蛋鸡小麦型日粮中的应用 总被引：1，自引：0，他引：1
试验选用来源于同一鸡场、体重相当的健康尼可红蛋鸡450只,采用单因子随机区组设计,共分5个处理,每个处理3个重复,每个重复30只鸡。处理1为小麦型日粮,处理2、3、4、5为在小麦型基础日粮中分别添加0.05%、0.10%、0.15%、0.20%的小麦专用复合酶制剂（838B）。以确定此复合酶制剂在蛋鸡小麦型日粮中的作用效果和适宜添加量。结果表明：在蛋鸡小麦型日粮中添加酶制剂能显著提高蛋鸡的生产性能。与饲粮1相比,加酶各组的产蛋率分别提高了2.74%、3.59%、1.32%、1.05%,并且均差异显著（p﹤0 相似文献
5.
芽孢杆菌制剂对蛋鸡生产性能及蛋品质的影响 总被引：1，自引：0，他引：1
摘 要：本试验旨在研究芽孢杆菌制剂对蛋鸡生产性能及蛋品质的影响。选择健康、产蛋均匀的259日龄“京粉一号”蛋鸡3 600只,随机分为2组,每组6个重复,每个重复300只鸡。对照组饲喂基础日粮,试验组在基础日粮中添加3%的芽孢杆菌制剂,进行为期40天的试验。试验表明,在蛋鸡日粮中添加芽孢杆菌制剂对蛋鸡生产性能及蛋品质无显著影响,但是试验组有改善饲料转化率,提高产蛋率、平均蛋重的趋势,与此同时,试验组具有提高蛋壳硬度和蛋黄颜色的趋势,对蛋品质具有一定的改善作用。? 相似文献
6.
jgming@.com 《中国农学通报》2006,22(3):16-16
研究了优生素对草杂雏鸡生长性能和淋巴器官发育的影响。试验选用100只一日龄草杂雏鸡,随机分为两组,即对照组和试验组,50只/组。基础日粮相同,优生素按照500g/t添加到基础日粮中。试验结束时,每组随机取10只鸡解剖采集胸腺、腔上囊、脾脏等淋巴器官样品,置于Bouin固定液中固定,常规方法制作组织切片,HE染色,Olympus显微镜观察、拍照。结果表明,试验组鸡的日增重较对照组高,差异显著(p<0.05);采食量试验组鸡较对照组低,但差异不显著(p>0.05);料肉比试验组鸡较对照组低,差异不显著(p>0.05);试验组鸡的胸腺小叶皮质增厚,胸腺小体增多;腔上囊皱襞发达,退化延缓;脾脏的脾小结体积增大,脾动脉周围淋巴鞘增厚。结论,优生素可提高雏鸡日增重,提高饲料转化率,促进胸腺和腔上囊的早期发育,延缓腔上囊的退化,增强脾的免疫应答反映。 相似文献
7.
将240只66周龄罗曼蛋鸡(平均2.46 kg)随机分成4组,每组3个重复,每重复20只.对照组饲喂基础日粮,试验组日粮在基础日粮基础上分别添加0.5%,1.0%和1.5%丙酸锌,以研究丙酸锌对蛋鸡换羽和产蛋性能及鸡蛋品质的影响.结果表明:0.5%,1.0%和1.5%丙酸锌组,蛋鸡的采食量、体重、腹脂重、卵巢重和黄色卵胞数量显著降低(P＜0.05);1.0%和1.5%丙酸锌组输卵管重量显著降低(P＜0.05).丙酸锌的3个处理组蛋鸡血清LH、FSH和E2含量均显著降低(P＜0.05);1.0%和1.5%的丙酸锌处理组蛋鸡产蛋率显著升高(P＜0.05),蛋壳相对重、蛋壳厚度均比对照组显著增加(P＜0.05);蛋重、蛋比重、蛋黄指数、蛋形指数、哈夫单位和蛋白高度差差异均不显著(P＞0.05).结论:丙酸锌能够引起蛋鸡换羽,提高蛋壳质量. 相似文献
8.
本试验旨在研究灵芝粉对蛋鸡生产性能、蛋品质及粪便NH3和H2S释放量的影响。试验选择300只35周龄体重和生产性能接近的健康地方蛋鸡,随机分为3组,每组5个重复,每个重复20只。对照组饲喂基础日粮,试验组分别饲喂添加0.3%、0.6%灵芝粉的基础日粮,试验周期为8周。结果表明：(1)0.3%试验组和0.6%试验组的产蛋率均显著高于对照组(P<0.05)、料蛋比均显著低于对照组(P<0.05),且试验组间均差异不显著(P>0.05)。(2)0.6%试验组的哈氏单位显著高于对照组(P<0.05),而与0.3%试验组差异不显著(P>0.05),0.3%试验组和0.6%试验组的蛋壳相对重均显著高于对照组(P<0.05),0.6%试验组的蛋壳厚度显著高于对照组和0.3%试验组(P<0.05)。(3)0.3%试验组和0.6%试验组粪便NH3释放量均显著低于对照组(P<0.05),分别降低23.69%和26.50%;0.6%试验组粪便的H2S释放量显著低于对照组(P<0.05),降低27.51%。饲粮中添加灵芝粉可以显著提高蛋鸡生产性能,降低料蛋比,改善鸡蛋蛋品质,降低粪便NH3和H2S释放量。 相似文献
9.
将240只66周龄罗曼蛋鸡（平均2.46 kg）随机分成4组,每组3个重复,每重复20只。对照组饲喂基础日粮,试验组日粮在基础日粮基础上分别添加0.5%,1.0%和1.5%丙酸锌,以研究丙酸锌对蛋鸡换羽和产蛋性能及鸡蛋品质的影响。结果表明：0.5%,1.0%和1.5%丙酸锌组,蛋鸡的采食量、体重、腹脂重、卵巢重和黄色卵胞数量显著降低（P〈0.05）;1.0%和1.5%丙酸锌组输卵管重量显著降低（P〈0.05）。丙酸锌的3个处理组蛋鸡血清LH、FSH和E2含量均显著降低（P〈0.05）;1.0%和1.5%的丙酸锌处理组蛋鸡产蛋率显著升高（P〈0.05）,蛋壳相对重、蛋壳厚度均比对照组显著增加（P〈0.05）;蛋重、蛋比重、蛋黄指数、蛋形指数、哈夫单位和蛋白高度差差异均不显著（P〉0.05）。结论：丙酸锌能够引起蛋鸡换羽,提高蛋壳质量。 相似文献
10.
饲粮短期高剂量添加硫酸镁对杂种野猪肉品质的影响 总被引：2，自引：0，他引：2
研究了在基础日粮中短期添加不同水平的硫酸镁对杂种野猪肉品质的影响。试验分成4个处理,每个处理2个重复,每个重复3头猪。试验进行5d,处理组镁（硫酸镁）的添加水平分别为0、1000、2000和3000mg/kg。结果表明,在屠宰前5天饲粮添加2000mg/kg、3000mg/kg硫酸镁显著提高了杂种野猪肉的品质,显著提高了猪肉的初始pH（pH1）和肉色评分（p<0.05）,分别比对照组提高5.92%、5.10%和17.77％、16.94％;显著降低了滴水损失（p<0.05）,比对照组分别降低了13.13％和17.90%。此外,2000mg/kg组血清镁和肌肉镁含量比对照组分别提高了26.15%和13.81%;3000mg/kg组血清镁和肌肉镁含量比对照组分别提高了30.77%和15.98%。 相似文献
11.
Jens Jensen 《Euphytica》1979,28(1):47-56
Summary The high-lysine gene in Risø mutant 1508 conditions an increased lysine content in the endosperm via a changed protein composition, a decreased seed size, and several other characters of the seed. The designation lys3a, lys3b, and lys3c, is proposed for the allelic high-lysine genes in three Risø mutants, nos 1508, 18, and 19. Linkage studies with translocations locate the lys3 locus in the centromere region of chromosome 7. A linkage study involving the loci lys3 and ddt (resistance to DDT) together with the marker loci fs (fragile stem), s (short rachilla hairs), and r (smooth awn) show that the order of the five loci on chromosome 7 from the long to the short chromosome arm is r, s, fs, lys3, ddt. The distance from locus r to locus ddt is about 100 centimorgans. 相似文献
12.
G. H. Kroon 《Euphytica》1994,76(1-2):125-125
Summary
K x vadensis is a hybrid of K. blossfeldiana and K. marmorata obtained after doubling the number of chromosomes. 相似文献
13.
Hongyan WEI Jian ZHOU Jinguang LU Jingzheng SONG Qiongxi YU Zhihong JIANG 《Medicinal Plant》2019,(6):27-29
[Objectives]This study aimed to establish a QAMS(quantitative analysis of multi-components by single-marker)method for simultaneous determination of four phenol... 相似文献
14.
Summary Avoidance of rust fungi that was based on poor appressorium induction was previously found in Hordeum chilense. In the present study 95 accessions of Triticeae were screened for avoidance of Puccinia hordei. The percentage of appressorium formation per germinated spore ranged from 6 to 90%. On none of the 41 accessions of Aegilops, Agropyron, Elymus, Secale, Thinopyrum or Triticum studied was the rate of appressorium formation lower than 25%. Lower rates of appressorium formation were, however, found on accessions of wild barley species Hordeum brachyantherum, H. marinum, H. parodii and H. secalinum. Its implications in cereal breeding are discussed. 相似文献
15.
D. A. Bond G. J. Jellis G. G. Rowland J. Le Guen L. D. Robertson S. A. Khalil L. Li-Juan 《Euphytica》1993,73(1-2):151-166
Progress is being made, mainly by ICARDA but also elsewhere, in breeding for resistance to Botrytis, AScochyta, Uromyces, and Orobanche; and some lines have resistance to more than one pathogen. The strategy is to extend multiple resistance but also to seek new and durable forms of resistance. Internationally coordinated programs are needed to maintain the momentum of this work.Tolerance of abiotic stresses leads to types suited to dry or cold environments rather than broad adaptability, but in this cross-pollinated species, the more hybrid vigor expressed by a cultivar, the more it is likely to tolerate various stresses. 相似文献
16.
Chunli TANG Fengxian ZHAO Hongxia CHEN Jiabao MA Jiangcun WEI Meiyan QIU Zhen XIE 《Medicinal Plant》2019,(6):60-65
[Objectives]To optimize the water extraction process of Chinese Herbal Compound Man Gan Ning and establish a method for its extraction and content determination... 相似文献
17.
Summary Apple and pear pollen was irradiated with doses of 0, 50, 100, 250 and 500 krad (gamma rays) and stored at 4°C and 0–10% r.h. From the in-vitro germination percentages an average LD 50 dose of about 220 krad was estimated. For both irradiated and untreated pollen a close and corresponding lineair relationship existed between germination percentage and pollen tube growth.Irradiated pollen was much more sensitive to dry storage conditions than untreated pollen, resulting in less germination and more bursting. Apparently, irradiation caused the pollen cell membrane to lose its flexibility faster than normal. Rehydration of dry-stored, irradiated pollen in water-saturated air restored germination percentages up to their initial levels. The importance of this procedure in germination trials is stressed. 相似文献
18.
E. Keep 《Euphytica》1986,35(3):843-855
Summary Cytoplasmic male sterility (cms) is described in the F1 hybrids Ribes × carrierei (R. glutinosum albidum × R. nigrum) and R. sanguineum × R. nigrum. In backcrosses to R. nigrum, progenies with R. glutinosum cytoplasm were either all male sterile, or segregated for full male fertility (F) and complete (S) and partial (I) male sterility. Ratios of F:I+S suggested that two linked genes controlled cms, F plants being dominant for one (Rf
1) and recessive for the other (Rf
2).Segregation for cms in relation to three linded genes, Ce (resistance to the gall mite, Cecidophyopsis ribes), Sph
3(resistance to American gooseberry mildew, Sphaerotheca mors-uvae) and Lf
1(one of two dominant additive genes controlling early season leafing out) indicated that Rf
1and Rf
2were in this linkage group. The gene order and approximate crossover values appeared to be: % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXafv3ySLgzGmvETj2BSbqef0uAJj3BZ9Mz0bYu% H52CGmvzYLMzaerbd9wDYLwzYbItLDharqqr1ngBPrgifHhDYfgasa% acOqpw0xe9v8qqaqFD0xXdHaVhbbf9v8qqaqFr0xc9pk0xbba9q8Wq% Ffea0-yr0RYxir-Jbba9q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dme% aabaqaciGacaGaamqadaabaeaafaaakeaacaWGdbGaamyzamaamaaa% baGaaiiiaiaacccacaGGWaGaaiOlaiaacgdacaGG0aGaaiiiaiaacc% caaaGaaiiiaiaacccacaGGGaGaamOuaiaadAgaliaaigdakmaamaaa% baGaaiiiaiaacccacaGGGaGaaiiiaiaaccdacaGGUaGaaiOmaiaacs% dacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaaaacaWGsbGaamOzaSGa% aGOmaOWaaWaaaeaacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaiaacc% cacaGGGaGaaiiiaiaacccaaaGaamitaiaadAgaliaaigdakmaamaaa% baGaaiiiaiaacccacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaiaacc% cacaGGGaGaaiiiaiaacccacaGGGaaaaiaadofacaWGWbGaamiAaSGa% aG4maaaa!6E4D!\[Ce\underline { 0.14 } Rf1\underline { 0.24 } Rf2\underline { } Lf1\underline { } Sph3\]. Crossover values of 0.36 for Ce-Lf
1, and 0.15 for Lf
1-Sph
3were estimated from the relative mean differences in season of leafing out between seedlings dominant and recessive for Ce and Sph
3.It is suggested that competitive disadvantage of lf
1-carrying gametes and/or zygotes at low temperatures may be implicated in the almost invariable deficit of plants dominant for the closely linked mildew resistance allele Sph
3. Poor performance of lf
1- (and possibly lf
2-) carrying gametes and young zygotes during periods of low temperature at flowering might also account for the liability of some late season cultivars and selections to premature fruit drop (running off). 相似文献
19.
[Objectives] To determine the optimum extraction technology for total phenols of leaves in Acanthopanax giraldii Harms.[Methods]The single factor test and ortho... 相似文献
20.
Parasitic angiosperms cause great losses in many important crops under different climatic conditions and soil types. The most widespread and important parasitic angiosperms belong to the genera Orobanche, Striga, and Cuscuta. The most important economical hosts belong to the Poaceae, Asteraceae, Solanaceae, Cucurbitaceae, and Fabaceae. Although some resistant cultivars have been identified in several crops, great gaps exist in our knowledge of the parasites and the genetic basis of the resistance, as well as the availability of in vitro screening techniques. Screening techniques are based on reactions of the host root or foliage. In vitro or greenhouse screening methods based on the reaction of root and/or foliar tissues are usually superior to field screenings and can be used with many species. To utilize them in plant breeding, it is necessary to demonstrate a strong correlation between in vitro and field data. The correlation should be calculated for every environment in which selection is practiced. Using biochemical analysis as a screening technique has had limited success. The reason seems to be the complex host-parasite interactions which lead to germination, rhizotropism, infection, and growth of the parasite. Germination results from chemicals produced by the host. Resistance is only available in a small group of crops. Resistance has been found in cultivated, primitive and wild forms, depending on the specific host-parasite system. An additional problem is the existence of pathotypes in the parasites. Inheritance of host resistance is usually polygenic and its transfer is slow and tedious. Molecular techniques have yet to be used to locate resistance to parasitic angiosperms. While intensifying the search for genes that control resistance to specific parasitic angiosperms, the best strategy to screen for resistance is to improve the already existing in vitro or greenhouse screening techniques. 相似文献