共查询到20条相似文献,搜索用时 437 毫秒
1.
对甘农3号、三得利、旱地、WL343、巨能601、威神等6个紫花苜蓿(Medicago sativa)品种开展根瘤菌接种试验,以越冬率、分枝数、株高、干草产量、粗蛋白、酸性洗涤纤维、中性洗涤纤维、相对饲喂价值等为评价指标,采用灰色关联法分析行评价接种根瘤菌对紫花苜蓿生产性能及营养价值的影响。结果表明:接种根瘤菌可显著提高紫花苜蓿品种的越冬率、株高、干草产量和粗蛋白含量(P<0.05),对紫花苜蓿的分枝数、酸性洗涤纤维、中性洗涤纤维、相对饲喂价值的影响不显著(P>0.05),可促进紫花苜蓿提前接瘤,促进提高苜蓿产量和饲草品质,是提高苜蓿产草量和饲草品质的有效措施,可大面积推广应用。 相似文献
2.
3.
4.
5.
内蒙古兴安盟地区个紫花苜蓿品种营养价值比较研究 《畜牧与饲料科学》2021,42(6):63-67
[目的] 筛选内蒙古兴安盟地区营养价值较好的紫花苜蓿品种。[方法] 以国外引进的34个紫花苜蓿品种为试验材料,在内蒙古兴安盟地区开展种植试验,测定各参试品种紫花苜蓿的粗蛋白、粗脂肪、粗灰分、中性洗涤纤维和酸性洗涤纤维含量,计算相对饲用价值,运用隶属函数法对营养价值进行综合评价。[结果] 参试的34个紫花苜蓿品种中,粗蛋白、粗脂肪、粗灰分、中性洗涤纤维和酸性洗涤纤维含量最高的分别是“SK3010”“阿尔冈金”“康赛”和“挑战者”。相对饲用价值最高的品种是“巨能2”。隶属函数法综合评价较好的3个参试品种是“巨能2”“SK3010”“阿尔冈金”。[结论] 参试的34个紫花苜蓿品种中“巨能2”“SK3010”“阿尔冈金”3个品种在内蒙古兴安盟干旱冷凉区具有较高的推广利用价值。 相似文献
6.
7.
8.
为提高柴达木盆地饲草质量,充分发挥紫花苜蓿(Medicago sativa L.)饲用价值,本研究选取19个紫花苜蓿品种为供试材料,探究品种和茬次对紫花苜蓿生产性能和饲用品质的影响,并通过灰色关联度法综合评价,筛选适宜柴达木盆地种植的紫花苜蓿品种。结果表明,第1茬粗蛋白、粗灰分含量低于第2茬,第1茬粗纤维、酸性洗涤木质素、中性洗涤纤维、酸性洗涤纤维高于第2茬。‘大业3号’年干草产量最高,为11.91 t·hm-2;‘6010’‘极光’平均粗蛋白含量较高,分别为21.01%,20.90%;‘4030’的相对饲喂价值、粗饲料分级指数均最高,分别为151.20,5.54。因此,‘勇士’‘4030’‘佰苜201’等几个品种综合表现较好,适宜柴达木盆地种植。 相似文献
9.
10.
11.
12.
魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
13.
14.
本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
15.
REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
16.
17.
18.
Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献
19.
乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 相似文献