共查询到20条相似文献,搜索用时 187 毫秒
1.
2.
3.
荨麻是一种在许多国家具有传统药用价值的植物。尽管荨麻被集约化农业视为一种杂草,但它的生物学特性、可用性,以及简单的加工技术,可以使其成为家禽养殖场的优质膳食补充剂。荨麻是多年生草本植物,雌雄同株,营养非常丰富。既有良好的药用价值、食用价值和饲用价值等,又是牙膏、肥料、麻绳等的原材料。本文将主要介绍荨麻的饲用价值研究进展。 相似文献
4.
5.
为了解饲药两用特色牧草西藏荨麻营养物质和生物活性物质含量的动态变化,分别于营养期、开花期和结实期采集西藏荨麻样品,测定其常规营养成分、矿物质元素、脂肪酸组分及生物活性物质含量。结果表明:西藏荨麻在营养期的粗蛋白质和粗灰分含量最高,分别为34.97%和26.52%。西藏荨麻富含钙和铁,其含量在结实期和开花期达到峰值,分别为48.41和1.73 g/kg。生长期西藏荨麻的脂肪酸组分主要由亚油酸、α-亚麻酸、棕榈酸和油酸构成,不饱和脂肪酸和n-3多不饱和脂肪酸分别占71.66%和52.83%,且全株中平均含黄酮1.49%、粗多糖0.83%、单宁0.34%和总皂苷0.12%。随着生长期延长,粗蛋白质和粗灰分含量显著降低而纤维组分含量显著增加(P<0.05);锌和铜含量显著减少,而钼含量显著增加(P<0.05);脂肪酸组分基本在结实期最高(P<0.05),而营养期和开花期差异不显著;黄酮、粗多糖和单宁含量均在开花期最高,总皂苷含量在结实期最高(P<0.05);说明生长期西藏荨麻营养丰富多样,各种成分含量存在明显的季节性波动。 相似文献
6.
7.
8.
荨麻属植物的生理活性及饲用价值 总被引:1,自引:0,他引:1
荨麻俗名炫麻、白活麻或青活麻,为被子植物门,荨麻科,荨麻属,1年生或多年生草本植物。荨麻叶片含有丰富的蛋白质和维生素,将叶片粉粹加入鱼食料中,可作为一种良好的叶酸稳定剂、绿肥及纤维原料;还可将成熟植株的茎叶晒干,粉碎后做成青干饲料,牛、羊、骆驼及家禽都喜食(崔友文,1 相似文献
9.
10.
荨麻的营养作用及青贮发酵特性探讨 总被引:5,自引:1,他引:4
荨麻营养丰富,是一种具有药用与饲用双重功效的多功能野生植物资源.因其蛋白质含量高,对青贮发酵的缓冲能力强,常规青贮不易获得成功.因此,建议添加乳酸菌制荆来青贮荨庥,以提高其发酵品质. 相似文献
11.
生态恢复理论与技术研究现状及浅评 总被引:14,自引:1,他引:13
通过综述生态恢复研究的产生与发展、国内外生态恢复研究的现状、研究的内涵、应用的理论与技术,提出生态恢复国外研究渐趋成熟,但国内研究尚处起步阶段,加强国内外的理论研究与技术交流是加快我国生态恢复研究的有效方法;建立生态系统预测预报系统和预警系统,确诊我国生态系统退化程度是当务之急;尽快研究适宜我国生态恢复的生物资源,遵循生态学原理进行生态恢复工程建设,并应加强学科、领域、部门合作,系统研究生态恢复问题. 相似文献
12.
《配合饲料学》课程教学改革与方法 《畜牧与饲料科学》2016,37(10):70-70
《配合饲料学》是动物科学专业应用性很强的一门课程,教学中应注重学生实践能力的培养,将理论与实践相结合。对《配合饲料学》课程教学模式改革初步探讨,以期通过改变现有的教学模式与内容,提高学生实践创新能力及综合素质。 相似文献
13.
R I Coubrough 《The Onderstepoort journal of veterinary research》1985,52(3):153-156
The effect of both environmental and management related stressors on fertility is discussed. While environmental heat as a stressor is significant in disrupting normal reproductive cyclicity, management induced stress is becoming more important when related to the requirements of modern production methods. Deviations in hormonal patterns are noted, and the clinical manifestations brought about by these changes are described. Since reproduction is the ultimate measure of an animal's ability to adapt to an ever changing external milieu, as well as forming the basis of life-time productivity, research should be aimed at obtaining greater clarity of the hormonal interactions involved. The role of neurotransmitters in these physiological mechanisms should not be overlooked. Psychobiological studies must be extended so as to provide a positive input into management procedures that should be used in intensive production units for optimal fertility and productivity. 相似文献
14.
15.
16.
Summary A large Babesia species occurs in sheep on the North Sea islands of the Netherlands. The tick Haemaphysalis punctata is a vector. Its pathogenicity appears to be low. It is morphologically similar to a Turkish strain, considered to be B. motasi, which is also transmitted by Haemaphysalis ticks. It differs from the Turkish parasite serologically as well as in cross-immunity tests and in not being effective to goats. There may be a group of morphologically similar parasites with serological differences and different infectivity for sheep and goats. As it is impossible to know which one is to be considered as the original B. motasi, we designate the Dutch parasite as B. motasi (Netherlands). Anaplasma mesaeterum was found to occur on the island of Texel as well as on Ameland, where it had been found initially. 相似文献
17.
文章对上海某猪场配怀母猪脱肛的三种治疗方案进行对比,结果发现:手术缝合治疗母猪脱肛实际疗效最为理想,可作为猪场治疗母猪脱肛的主要手段;热灼法虽然操作简单,但可能对脱肛严重的猪不起作用,所以脱肛严重时不建议使用,或用在猪脱肛后的手术护理上;固涩液治疗法疗效有限,不如手术缝合法那样可使直肠长久复回原位,因而也不推荐猪场使用。最后,文章综合3种方案的实际效果对猪场提出了预防母猪脱肛的建议。 相似文献
18.
Effect of harvest date on shearing force of maize stems 总被引:2,自引:0,他引:2
Shearing force, one of physical characteristics, is an important indictor of forage value. Maize stem abounds in agro-pastoral ecotone in north-east China and can be utilized as ruminant forage in cold season. The objective of this study is to investigate temporal dynamics and vertical change of shearing force of maize stem because stem is the dominant morphological component contributing to stover nutritive value. Three maize varieties were selected in the study. The stem was cut into 4 segments, and every segment was measured at the approximate midpoint. The results show that shearing force increases with advancing maturity of maize. On same sampling date, shearing force of bottom part of stem is higher than that of upper part. Maize should be harvested as early as possible to avoid the decrease of forage value of stover. Of course, grain yield cannot be sacrificed greatly because maize is grown for its grain in this area. The upper part of stover should be selected as ruminant forage in order to improve the forage digestibility. If maize stover is utilized efficiently, it can play an important role for filling forage shortage gap in agro-pastoral ecotone in north-east China. There is positive relationship between shearing force and cellulose content, and between shearing force and lignin content. Measuring shearing force is very simple, so it can be used to predict forage value of maize stover. 相似文献
19.
糖甜菜不仅是糖料作物,而且其收获和制糖后的副产品都有很高的饲料价值,每公顷生产的饲料单位高于饲用甜菜等块根类饲料作物,其茎叶营养价值与苜蓿接近;糖甜菜抗逆性强,对温度适应范围广,耐旱、耐寒、抗盐碱,用于开发饲料具有重要的经济意义,在农业种植结构调整中,糖甜菜作为饲料作物纳入三元结构中有显著优势。 相似文献