不同干燥失水方式对云南温带优良牧草营养品质的影响研究     

匡崇义薛世明  周自玮 《四川草原》2005,(3):1-4

采用迅速烘干、太阳晒干和缓慢烘干3种处理对云南温带21个牧草品种的鲜草进行干燥处理,分别测定干草的营养成分。结果表明:以干草的粗蛋白含量为指标,干燥方法以迅速烘干为佳,其次是太阳晒干,最差是缓慢烘干;从干草的粗脂肪考虑,其变化无规律,因牧草品种的不同而不同;其余指标变化不大。  相似文献   

内蒙古农牧交错带饲草资源饲用价值评价   总被引：2，自引：0，他引：2  

赵淑芬  王宗礼  孙启忠  闫志坚  李志勇 《中国草地学报》2005,27(3):49-52

对地处内蒙古农牧交错带的林西县饲草资源进行了营养成份分析及饲用价值评价,结果表明:苜蓿粗蛋白质含量高于灌木类及青贮玉米,其营养动态变化规律是随生育期的变化粗蛋白质含量呈下降趋势,粗纤维含量呈上升趋势,各种成份在茎叶中的含量也随生育期变化而变化;灌木类饲用植物粗蛋白质含量15.69%～18.48%,青贮玉米粗蛋白质含量7.64%～11.15%。  相似文献   

中国牧草育种研究进展   总被引：5，自引：0，他引：5  

于林清  云锦凤 《中国草地学报》2005,27(3):61-64

综述了我国牧草种质资源、生物技术、新品种培育、良种繁育等方面的研究进展,分析了我国牧草育种研究中存在的优异牧草种质资源匮乏、育种方法较为落后、良繁体系不健全等问题,并提出了加强基础研究、完善国家牧草种质资源、牧草遗传育种及良繁体系建设的建议。  相似文献   

现代集约化肉羊业主要关键技术研究与应用     

赵有璋  李发弟  姚军  张子军  王玉琴  蔡原  陈亚明  祝淑英  李永连  赵宗蕾  王敏芬  冯涛  郭健  杨富民 《中国草食动物》2005,25(2):3-9

专门化肉用种羊选定、引进后，通过适应性研究，在较大规模养羊业生产实践中。对现代集约化肉羊业的主要关键技术进行研究、完善和创新，组装集成并应用于生产。技术研究应用结果既为市场提供了大批专门化肉用种羊和优质安全的杂种肉羊，取得了高水平的研究成果及显著的经济效益和社会效益．又为我国目前正在迅速发展的集约化肉羊业提供了可靠的技术支持和理想的生产模式：从适宜的专门化肉羊品种到运用高效母羊快速扩繁技术．建立和完善有效的肉羊杂交利用体系，普遍应用种羊鲜、冻精生产大批肉用杂种羔羊，种植高产优质饲草及其科学加工调制和利用．建立严格兽医防疫制度．实行放牧 补饲或全舍饲的精细管理和集约化育肥，至生产优质、安全、标准肉羊，获得显著的经济效益和社会效益。  相似文献   

Seasonal Changes in Forage Nutrients and Mineral Contents in Water Resources,Forage and Yak Blood     

阎萍  Zh.Dejuan  X.Xishan  P.Heping  Ch.Shengli 《中国草食动物》2005,(Z2):209-210

This paper reports results of a study conducted to investigate the concentrations of seven mineral elements in yak blood, forage and water resources around the Qinghai Lake in Qinghai Province in different seasons. Meanwhile, the nutritional compositions of the forage were also surveyed. The results suggest that the mineral elements and the forage nutrients change in a seasonal pattern. In yak blood,the sodium(Na)concentration varies from 0.291 to 0.034 mg/mL,and this is lower than the normal value. In the forage,the ratio calcium(Ca)to phosphorus(P)is 4.06～7.47:1 and potassium(K)to Na 30～27:1. These results indicate that the nutrition of the yak in the area is deficient in Na but high in K. For the withered forage sampled in February,the protein content is only 31.14% of the total protein in the forage growing at puerile stage in June. The severe loss of protein by 68. 9% and decrease of effective nutrients in the wintered forage are considered to be the reasons resulting in the poor condition of yak in winter and spring seasons.  相似文献   

牧草产业是我国家兔产业可持续发展的重要支撑     

张凯  刘汉中  鄢家俊  余志菊  王丽焕  文斌  刘宁 《四川草原》2011,(1):41-43

针对我国家兔规模化养殖的快速发展,牧草作为家兔生产主要饲料原料来源,供需矛盾日益突出。本文重点从家兔消化生理特点、兔产品安全生产、农民增收、需求现状与问题等方面进行了论述,并提出了相应对策。  相似文献   

Influence of Aguamiel (Agave atrovirens) as a Natural Feed Additive on Cecal Fermentation Kinetics of Some Forage Species in Horse Feeding     

《Journal of Equine Veterinary Science》2017

This study aimed to evaluate the effect of different dose levels of aguamiel (Agave atrovirens) on in vitro cecal gas, methane (CH₄), and carbon dioxide (CO₂) productions of five forage species (Avena sativa [hay]), Moringa oleifera, Caesalpinia coriacea, Salix babylonica, and Eichhornia crassipes using inocula from the horse. The forage samples were incubated with three doses of aguamiel: 0, 34, and 68 μg of aguamiel/g dry matter (DM) of substrate. Cecal inocula were collected from four adult female Criolla horses (3–4 years of age and weighing 300 ± 15.0 kg) grazed on native grasses for about 8 hours without supplementation. Forage type affected (P < .001) cecal asymptotic, rate and lag time of gas, CH₄ and CO₂ productions (mL/g DM), pH and DM degradability. Aguamiel dose had linear and quadratic effects (P < .05) on the asymptotic and rate of CH₄ productions and rate and lag time of CO₂ productions (mL/g DM). Forage type × aguamiel dose interactions were significant (P < .05) for asymptotic, rate and lag time of gas, and CH₄ and CO₂ productions (mL/g DM). Forage species effects were pronounced (P < .05) on CH₄ and CO₂ productions (mL/g incubated and degraded DM) and proportional CH₄ production at all hours of incubation, except for CO₂ production (mL/g incubated DM). Aguamiel dose affected (P < .05) CO₂ production (mL/g incubated DM) and proportional CO₂ production at the incubated hours. Forage type × aguamiel dose interactions were observed (P < .05) for CO₂ production (mL/g incubated DM) and proportional CO₂ production at the incubated hours but had no impact on CH₄ production. It is concluded that addition of aguamiel to five forage species affected fermentation kinetics of gas production resulting in different in vitro cecal gas, CH₄ and CO₂ productions from these substrates.  相似文献   

Horse Preference,Forage Yield,and Species Persistence of 12 Perennial Cool-Season Grass Mixtures Under Horse Grazing     

《Journal of Equine Veterinary Science》2016

Cool-season grass mixtures are rarely evaluated for preference, yield, and persistence under horse grazing. The objectives of this research were to evaluate horse preference, forage yield, and persistence of cool-season grass mixtures under horse grazing. Eight commercially marketed and four experimental perennial cool-season grass mixtures were planted in 2009 in a randomized complete block with five replicates and grazed by four adult horses during 2010, 2011, and 2012. All mixtures contained four to six cool-season perennial grass species. Specie density measurements were taken in each spring and fall, and yield was mechanically measured before each grazing period. After grazing, preference was determined by visually assessing percentage of forage removal on a scale of 0 (no grazing) to 100 (100% of vegetation removed). Data were analyzed using a mixed-model analysis of variance and liner regression. Horses preferred mixtures containing tall fescue, perennial ryegrass, Kentucky bluegrass, and timothy (P < .001). Horses had less preference for mixtures containing ≥30% orchardgrass (P < .001). Mixtures had similar (P = .11) forage yields that ranged from 6,100 to 7,082 kg ha⁻¹. After 2 years of grazing, orchardgrass and tall fescue increased; Kentucky bluegrass remained stable; and festulolium, meadow fescue, and perennial ryegrass had the greatest rate of decline in mixtures. Orchardgrass became the dominate species, regardless of initial percentage in the mixture. Mixtures containing tall fescue, perennial ryegrass, Kentucky bluegrass, and timothy should be planted in midwestern US horse pastures; however, mixtures will likely transition to tall fescue and Kentucky bluegrass–dominated pastures.  相似文献   

施氮量对粮饲兼用玉米子粒产量和饲用品质的影响   总被引：1，自引：0，他引：1  

王晨光  赵美娟  裴文东  王国兴  张宏军  雷格丽  张仁和 《玉米科学》2020,28(6):148-153

2017~2018年以主推粮饲兼用玉米陕科9号品种为材料,设0、90、180、270和360 kg/hm² 5个氮肥水平进行大田试验,测定不同氮肥处理下叶面积指数、产量和饲用品质和氮肥利用率等性状指标,分析施氮量对玉米子粒产量、饲用品质和氮肥利用率的影响。结果表明,随施氮量的增加,叶面积指数、SPAD值和生物量增加;子粒产量随施氮量的增加先增加后稳定,此时最佳施氮量为268 kg/hm²,产量增加64.4%。随着氮肥增加,氮肥农学效率呈先增加后降低,氮肥偏生产力降低。饲用品质分析显示,子粒蛋白质、淀粉和脂肪含量随着施氮量增加而增加,在氮肥270 kg/hm²处理下分别较不施氮处理增加2.4%、13.7%和22.5%;秸秆中性洗涤纤维和酸性洗涤纤维含量分别减少20.4%和18.1%,秸秆粗蛋白和体外干物质消化率分别增加22.5%和17.6%。适当增施氮肥改善玉米群体质量,增加产量和氮肥利用率,提高饲用价值。陕北灌区粮饲兼用玉米生产实践中,推荐适宜施氮量为268 kg/hm²。  相似文献   

主成分分析对黄海6种主要饵料鱼类的质量分析评价          下载免费PDF全文

李忠义  林群  戴芳群  张波  金显仕 《渔业科学进展》2009,30(5):64-68

根据黄海6种饵料鱼类的碳氮比、脂肪含量、蛋白质含量、碳含量及非水分含量5个指标,采用主成分分析法对其进行质量排序。结果表明,依代表生物基本能量的第1主成分,6种鱼的质量顺序为鳀Engraulis japonicus、凤鲚Coilia mystus、黄鲫Setipinna taty、赤鼻棱鳀Thryssa kammalensis、细条天竺鲷Apogonichthys lineatus和黑鳃梅童鱼Collichthys niveatus;依代表营养价值的第2主成分,6种鱼的质量顺序为黄鲫、凤鲚、黑鳃梅童鱼、赤鼻棱鳀、鳀和细条天竺鲷;营养质量的综合排序为凤鲚、黄鲫、鳀、赤鼻棱鳀、细条天竺鲷和黑鳃梅童鱼。结果表明,单一营养质量指标或同类营养质量指标都不能完全代表整个饵料鱼类的质量。  相似文献