An Evaluation of the Acceptability as Forage of Some Nutritive and Antinutritive Components and of the Dry Matter Degradation Profiles of Five Species of Ficus     

Bamikole MA  Ikhatua UJ  Arigbede OM  Babayemi OJ  Etela I 《Tropical animal health and production》2004,36(2):157-167

The suitability of five species of Ficus, F. mucoso, F. thonningii, F. polita, F. religiosa and F. benjamina, for feeding ruminant livestock was studied. The nutritive and antinutritive components were determined and the acceptability of the forages to livestock was assessed using a cafeteria method in 8 adult small ruminants. Also, the degradation potential of the dry matter of the five Ficus species was investigated using 3 fistulated sheep. The crude protein (CP) content of the Ficus species varied significantly (p < 0.05), ranging from 130 to 180 g/kg DM. The content of neutral detergent fibre (NDF) also varied significantly (p < 0.05), ranging from 650 to 710 g/kg DM. The organic matter (OM) contents did not differ significantly (p > 0.05), having a mean value of 916 g/kg DM. The concentrations of tannin, saponin, phytic acid and oxalic acid were low. The acceptability of the forage was similar for four of the species but poor for F. polita. The extent of DM degradation varied significant among the Ficus species, the ranking order being F. benjamina > F. thonningii > F. mucoso > F. religiosa > F. polita.  相似文献   

顿河红豆草浓缩单宁生物合成相关蛋白鉴定     

王玉萍  杨茁萌  张博 《草地学报》2000,8(2):126-131

以二倍体顿河红豆草为实验材料,运用组织培养法和香草醛-盐酸法筛选优良浓缩单宁高表达的细胞系。用十二烷基硫酸钠聚丙烯酰胺凝胶电泳(SDS-PAGE)技术,对同一细胞系不含浓缩单宁(CT^-)愈伤组织和含有浓缩单宁(CT⁺)愈伤组织蛋白质进行鉴定。用制备型SDS-双向电泳对目标蛋白进行纯度分析,以及用SDS-PAGE法和IEF(等电聚焦)法测定该目标蛋白质分子量和等电点。最后经电印渍技术,将目标蛋白质转移至固相膜上进行氮端氨基酸序列分析。结果表明,筛先出10个优良浓缩单宁合成细胞系和相同基因型愈伤组织增殖细胞系。同一细胞系含有浓缩单宁愈伤组织比不含者多一条蛋白带,该蛋白分子量为28kD,等电点为5.7。该电印渍法将蛋白印渍至PVDF(聚偏二氟乙烯)膜上的效率较高。并测定了氮端部分氨基酸序列。  相似文献   

单宁基胶黏剂的固化剂研究进展     

冯小朴  崔举庆  韩书广  邓玉和  卢晓宁 《林产工业》2015,42(5)

综述了单宁胶黏剂的醛基固化剂、新型固化剂和自缩聚方面的研究进展。基于我国单宁资源的特点,深入开展固化剂研究,将是我国单宁胶黏剂的主要发展方向。  相似文献   

高粱中单宁含量的检测方法分析   总被引：2，自引：1，他引：1  

穆志新  田翔  师颖 《山西农业科学》2014,(6):551-553

结合国家标准GB/T15686—2008与实验室的实际情况,建立高粱中单宁含量的测定方法。对显色反应时间、酸碱性、溶液反应温度等方面进行了反复的验证。经过对单宁标准系列的测定,结果表明,显色剂与单宁反应后溶液颜色变化显著,用分光光度计在波长为525 nm处测定,单宁质量浓度在0.1~5 mg/mL范围内服从朗伯-比耳定律,回归方程为A=0.9640c+0.219 3,相关系数R2为0.995 4。经过对17个高粱品种样品单宁含量进行测定,该方法的回收率在97.3%~103.4%范围内。该方法简便快捷、灵敏度高、特异性好、结果准确,适合大批量样品分析,可应用于高粱中单宁含量的检测。  相似文献   

太行山水柿果实成熟过程中主要成分含量的动态变化   总被引：3，自引：0，他引：3  

莫海珍  李迎秋  张浩 《河南农业大学学报》2006,40(2):161-163,167

对太行山水柿转色期后果实成熟过程中总糖、蛋白质、单宁等主要成分的变化规律进行研究,以确定最佳采收期.结果表明,在果实成熟过程中,可溶固形物和总糖的含量呈上升趋势,可溶固形物和总糖含量分别为180 g.kg-1,150 g.kg-1左右达到峰值,然后趋于平稳;单宁和蛋白质含量呈逐渐减少趋势,其含量分别在12 g.kg-1,6 g.kg-1左右时相对平稳;原果胶含量逐渐降低,可溶性果胶含量逐渐上升;总酸含量较低,整个过程变化不大.因此采收期的确定应以含糖量为准,当表皮呈现品种特有的橙黄色,含糖量达150~170 g.kg-1时采收,此时水柿可维持较高的硬度,有助于运输中的稳定性和完整性.  相似文献   

思茅松树皮单宁化学组成的研究     

罗庆云 Foo  LY 《东北林业大学学报》1994,22(5):76-79

从思茅松树皮获得的单宁，经葡聚糖凝胶ＳｅｐｈａｄｅｘＬＨ－２０柱分离得到各种级外。通过各种降解反应１３Ｃ－ＮＭＲ谱研究表明，思茅松树皮单宁是多聚原花青定，其延伸单元以２，３－顺式构型为主，终端单元以２，３－反式构型为主。经凝胶渗透色谱法（ＧＰＣ）测得思松树皮多聚原花青定的聚合度为４－２１。  相似文献   

冷藏处理对磨盘柿保鲜效果的影响     

杨绍艳  王文生  董成虎 《保鲜与加工》2007,7(5):22-24

对天津蓟县磨盘柿进行冷藏保鲜效果试验。结果表明,在（0±0．5）℃低温条件下,柿果贮藏30天时出现一个小的呼吸高峰值;在贮藏80天内,乙烯生成速率始终呈缓慢上升趋势,而硬度随时间推移呈线性下降。贮藏初期,柿果中可溶性单宁含量急剧下降,贮到66天时其含量已降到0．02％,低于果实的涩味阈值。维生素C含量在贮藏初期20天内明显上升达到高峰值,以后总趋势呈逐渐降低。试验同时发现,在20℃条件下磨盘柿具有典型的呼吸跃变现象。  相似文献   

Genetic variation in tannin-related characters of faba-bean seeds (Vicia faba L.) and their relationship to seed-coat colour     

G. Duc    N. Brun    R. Merghem    M. Jay 《Plant Breeding》1995,114(3):272-214

Tannin content and tanning power on haemoglobin were evaluated in a collection of faba-bean genotypes differing in seed and flower colour. All tannin-related measurements gave near-zero values for white-flowered genotypes; they showed intermediate values in brown and green-seeded genotypes, brown being lower in tannin values than green. Genetic analysis in the F₃ of a half-diallel design confirmed the strong link between brown and green testa colour and intermediate tanning activities.  相似文献   

Ensiling of total mixed ration containing persimmon peel: Evaluation of chemical composition and in vitro rumen fermentation profiles     

Ainissya Fitri  Taketo Obitsu  Toshihisa Sugino  Anuraga Jayanegara 《Animal Science Journal》2020,91(1)

The effects of inclusion of persimmon peel (PP) in total mixed ration (TMR) silage on its nutrient composition, tannin content, and in vitro ruminal fermentation were studied. Four types of TMR silages containing 0, 50, 100, and 150 g/kg of PP on a dry matter basis were prepared. The dietary contents of non‐fiber carbohydrate (NFC) decreased, while soluble protein fraction increased after ensiling of the TMR. In the TMR silages, the content of insoluble tannin increased (p < .05) with increasing PP level. The fraction of soluble protein decreased linearly (p < .01), while that of neutral detergent insoluble protein increased linearly (p < .01) with increasing the PP level in the TMR silages. The total gas and methane yields from the in vitro rumen fermentation of the TMR silages were lower (p < .01) than those of pre‐ensiled TMR and declined linearly (p < .01) with increasing PP level. These results indicate that adding PP to TMR silage may resist the breakdown of dietary protein during the ensiling process, although the ruminal fermentability of TMR possibly decreased after ensiling due to the loss of NFC.  相似文献   

松墨天牛为害对马尾松针叶化学成分的影响   总被引：17，自引：1，他引：17  

张华峰  陈顺立  朱建华  张思禄 《福建林学院学报》2004,24(1):28-31

通过对被松墨天牛为害的不同程度的马尾松针叶化学物质的测定,结果表明:受害的马尾松针叶的内次生物质黄酮和单宁含量随着幼虫钻蛀取食和成虫补充营养为害程度的加重而发生变化,先增加,后降低;受害马尾松针叶内营养物质总糖和可溶性糖含量先降低,后增加.说明了马尾松应激反应的过程是一种随着受害程度的不同,不断变化的动态过程.同时研究表明:马尾松对松墨天牛幼虫钻蛀取食和成虫补充营养的应激反应是不同的.对幼虫钻蛀取食的反应是不显著的;而对成虫补充营养的反应是显著的.说明了马尾松在与昆虫协同进化的过程中,对不同害虫及其不同的虫态产生了适应性.  相似文献