Effects of Dietary Crude Protein Levels on Growth Performance,Digestion and Metabolism,and Serum Biochemical Indexes of Super Merino Lamb     

WANG Chun-xin  ZHAO Yun-hui  ZHAO Zhuo  ZHU Jing-liang  ZHAI Bo  ZHAO Feng-jiang  ZHANG Ming-xin 《中国畜牧兽医》2016,43(1):108-113

The experiment aimed to find out the effects of dietary crude protein levels on growth performance, digestion and metabolism and serum biochemical indexes of Super Merino lamb after weaning.According to the dietary crude protein level, 64 Super Merino weaned lambs were divided into four groups, which the crude protein levels were 13.25%(group Ⅰ), 14.33%(group Ⅱ), 15.53%(group Ⅲ) and 16.60%(group Ⅳ), respectively.The experiment lasted for 60 days, 30 days for the early stage and 30 days for the later stage;And on the 30th and 60th day, blood samples were collected from one head sheep chosen from each replication, and at the end of the feeding test, 3 lambs were randomly selected from each experiment group for a 15 days digestion and metabolism experiment.The results showed that ADFI and ADG in the early and total trial period were significant differences(P<0.05), ADFI and ADG of group Ⅲ were higher than others.The apparent digestibility of nutrients and ME/DE were not significantly changed(P>0.05).In the detection of serum biochemical indexes, there was no significant difference in the earlier stage(P>0.05);At the end of the test, PK and CK showed significant difference between groups(P<0.05).PK presented a rising trend as the protein level improved, CK of group Ⅰ was higher than other groups.In Super Merino lamb early weaning diet, 15.53% protein level in the diet could significantly improve ADG, the apparent digestibility of nutrients, metabolic energy digestibility.At the end of the test, PK and CK were affected by dietary crude protein level significantly.  相似文献   

9种牧草对青海同德牧区土壤特性的影响     

陈懂懂  李奇  刘哲  刘力华  翟文婷  徐世晓  赵新全  赵亮 《草原与草坪》2016,(4):41-47

通过对青海省高寒牧区常见的9种多年生牧草单播2年后耕层0~15cm土壤理化(pH、容重(BD)、有机碳(SOC)、全氮(TN)、无机碳(C)及微生物学性质(微生物生物量碳(Cmic)、氮(Nmic)和群落代谢功能)等指标的测定分析,结果表明,研究区域只有在种植披碱草2年后土壤有机碳含量有所增加,说明与其他草种相比,种植披碱草利于有机质的积累;试验在每年施肥1次的情况下,土壤氮含量仍然偏低,说明此区氮素被过度利用,处于缺乏水平,因此每年增施氮肥数量、频率以及时间上应加强管理。通过对不同牧草种植区土壤各因子的聚类分析,发现贫花鹅观草、无芒雀麦、紫野麦草和扁穗冰草之间相似度较高,表明其对土壤养分及微生物群落功能的影响较为接近,故在大面积种植的时候可根据牧草地上生物量/质量的高低进行选择性播种。从土壤质量方向考虑,种植杂花苜蓿、红豆草和西北羊茅不利于土地的改良。  相似文献   

地下滴灌增温对盆栽花椰菜生长、产量和营养品质的影响     

王帘里  翟国亮 《北方园艺》2016,(6):14-19

以盆栽花椰菜为研究对象,在温室开展滴灌水增温处理(2、4、6℃)对花椰菜生长、生理、产量和营养品质的影响研究。结果表明:增温处理花椰菜株高、茎粗和叶片数增加;生长旺盛期,4℃和6℃增温处理叶片叶绿素相对含量增加(P0.05),增幅分别为13.7%和22.0%;4℃和6℃增温处理花球产量增加(P0.05),增幅分别为20.5%和26.6%;4℃和6℃增温处理花球氮、磷含量增加(P0.05),氮增幅分别为8.4%、14.5%,磷增幅分别为25.0%、36.7%;2、4、6℃增温处理,花球铁含量降低(P0.05),降幅高达50.2%~83.1%;增温处理花球钾、锌和钙含量增加,但未达差异显著水平(P0.05);增温处理根干重增加。  相似文献   

薄荷的快速繁殖与栽培技术的研究   总被引：3，自引：0，他引：3  

马春红陈霞翟彩霞  郭秀林崔四平李广敏 《中国农学通报》2004,20(4):230-230

本文介绍了薄荷的特性、栽培技术及用途，表明它在我们日常生活中起着重要的作用。用薄荷的组织培养方法可加速其繁殖系数，以达到迅速应用的目的。  相似文献   

Development And Countermeasure of Timeshare Estate     

YU Gui-ling  LI Hua-min  DENG Zi-hua 《保鲜与加工》2004,(1):110-114

In this paper the concept and active impaction on economy of timeshare were introduced. According to supply, demand and basic condition, developing timeshare estate were provided with basic condition in China. Analyzing the history of timeshare we can get the conclusion that it was unused real estate to startup the timeshare and so the development of timeshare in China have partly active effect. At last, in this paper the policy risk, consumption anticipation risk, lack of demand risk, product design risk, market orientation risk, system management risk, competition risk, internationalization risk, and market impression risk were analyzed except the market risk, business risk and polity risk and so on which were the common risks of real estate. And the countermeasure and measure how to promoting the development of timeshare estate were put forward.  相似文献   

单位线方法在沿渡河流域的应用研     

翟丽妮  梅亚东  孔凡哲 《中国农村水利水电》2007,(9):16-18

单位线方法在水文计算及洪水预报中得到了广泛的应用，至今仍然是汇流计算的重要工具。以沿渡河流域为研究背景，分别采用分析法及矩法推求了该流域的时段单位线，并分别用这两种单位线模拟了该流域的同次洪水过程，模拟结果表明分析法得到的单位线更加适合该流域的洪水计算。最后，在详细分析两种方法误差来源的基础上，提出了相应的改进措施。  相似文献   

四季秋海棠炭疽病菌生物学特性及生防因子的筛选     

张宝清  翟雅鑫  薛丽芳  曹挥  郝晓娟 《北方园艺》2021,(10):66-71

以四季秋海棠炭疽病菌(Colletotrichum truncatum)为试验材料,采用菌落生长法和孢子萌发法,研究了不同培养条件对四季秋海棠炭疽病菌菌落生长和孢子萌发的影响;采用生长速率法研究了14种植物提取物对四季秋海棠炭疽病菌的抑制作用,以期明确该病原菌生物学特性,筛选对其具有抑菌活性的植物提取物,为该病害的防治提供参考依据.结果 表明:最适宜该病原菌菌丝生长的温度为25～30℃,pH 7,最适碳源为葡萄糖,最适氮源为硝酸钠和甘氨酸.分生孢子萌发的最适温度是30～35℃,pH 6～7.丁香、石菖蒲、蛇床子提取物在2.0 mg·mL-1浓度下对菌丝生长具有较好的抑制作用,菌丝生长抑制率分别为100％、92％和90％,其它植物提取物抑制率在20％～85％.  相似文献   

CO₂加富及亏缺灌溉对菜豆中期与后期生长的影响     

翟锡姣  郑少文  王帅全 《中国瓜菜》2021,(4):105-111

为了探明菜豆中期与后期生长对CO₂加富与亏缺灌溉的生理响应,试验设两个CO₂水平:正常大气浓度和倍增CO₂浓度,两个灌溉水平:自然灌溉12次和亏缺灌溉6次,研究CO₂加富及亏缺灌溉对菜豆生长的影响。结果表明,CO₂加富显著提高菜豆生长中期株高与干质量,净光合速率(Pn)与胞间CO₂浓度(Ci)分别显著降低15.48%、37.67%,气孔导度(Gs)显著提高95.83%,菜豆生长后期的叶绿素a/b(Chla/b)显著提高12.29%,水分利用效率(WUE)显著提高46.51%,Ci显著降低12.87%。CO₂加富显著提高亏缺灌溉下生长中期菜豆的株高与干质量,但显著降低根冠比,显著提高叶绿素含量以及Gs;CO₂加富下生长后期的核酮糖-1,5-二磷酸羧化酶(Rubisco)及果糖-1,6-二磷酸酶(FBPase)活性分别显著提高78.05%与88.69%,CO₂加富使亏缺灌溉下碳酸酐酶(CA)与FBPase活性分别显著提高83.73%与64.84%。综上所述,CO₂加富提高菜豆生长中期对亏缺灌溉的适应性,对生长后期影响作用减小。  相似文献   

基于文献计量的荒漠灌丛研究现状及热点分析     

迟旭  党晓宏  蒙仲举  翟波  闫宇 《内蒙古林业科技》2021,47(1):50-56

以中国期刊全文数据库(CNKI)和Web of science数据库中与荒漠灌丛有关的文献为国内和国际文献基础数据源,利用Origin 2019按年份统计发文量、论文增长率和文献共被引次数,通过Bibexcel将筛选出的高频关键词生成共词矩阵,利用Ucinet和Netdraw等软件得出高频关键词共现网络化可视图.利用S...  相似文献   

化肥减施下粪水替代对设施白菜氮利用与土壤氮盈余的影响   总被引：1，自引：0，他引：1  

程娟  付莉  翟中葳  肖能武  杨柳  刘福元  杜会英  杜连柱  张克强 《农业环境科学学报》2021,40(11):2551-2558

为促进丹江口水源涵养区绿色发展,提升氮素利用率,控制农业面源污染,利用田间小区试验,研究化肥减施及减施下粪水替代对设施白菜产量、土壤无机氮累积量及氮素盈余的影响。结果表明,化肥减施20%对设施白菜产量影响不显著,相同施氮量下粪水替代白菜产量显著高于化肥减施处理,可以提高白菜对氮的利用能力。土壤硝态氮累积量随种植茬数的增加呈增加趋势,且显著高于土壤铵态氮累积量。化肥减施处理氮素盈余量较常规施肥处理降低了23.38%,化肥减施粪水替代处理氮素盈余量比常规施肥处理降低了29.24%~30.65%,氮素盈余量与土壤有机质含量和土壤硝态氮累积量呈显著正相关。研究表明,化肥减施下粪水替代在保证设施白菜产量的同时,提高了氮素利用率,是降低氮素盈余的有效措施。  相似文献