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504篇 您的检索式:作者名="LONG H L"
    题名 作者 年代 出处 被引量
1饲料中添加蛋白酶对肉鸡性能、养分利用率、肠道形态和胴体品质的影响显示文摘试验在饲喂玉米、高粱为主的肉鸡日粮中补充大豆,并添加蛋白酶,研究蛋白酶对肉鸡性能、养分消化率、肠道形态和胴体品质的影响。试验选取1日龄AA肉仔鸡(43.8±1.31 g)256只,均为公鸡,随机分配到2×2试验设计方阵中,方阵包括正常组(玉米组和高粱组)和蛋白酶组(空白组和添加蛋白酶150 mg·kg^(-1)的试验组)。试验1~21 d为第一阶段,22~42 d为第二阶段。试验结果表明,第二阶段中,日粮中添加蛋白酶极显著提高肉鸡的平均日增重(ADG,P<0.01),在整个试验过程中显著提高(P<0.05)。在各个时期,正常组对肉鸡生产性能均无显著影响(P>0.05)。19~21 d时,添加蛋白酶可显著提高肉鸡的表观代谢能(AME),干物质(DM)、总能量(GE)和养分消化率(P<0.05)。此外,日粮以高粱为主时,AME、GE消化率有降低趋势(P=0.05),氮沉积率也有降低趋势(P=0.08)。40~42 d时,日粮中添加蛋白酶可显著提高AME,DM、GE和氮沉积率(P<0.05)。21 d时,日粮中添加蛋白酶极显著增加肠绒毛高度、肠绒毛与隐窝深度比值,极显著降低十二指肠、空肠、回肠的隐窝深度(P<0.01)。42 d时,日粮中添加蛋白酶显著增加空肠肠绒毛高度、绒毛高度与隐窝深度比值,显著降低隐窝深度(P<0.05)。日粮中添加蛋白酶显著增加胸肌重、24 h p H,显著降低胸肌的滴水损失(P<0.05)。试验结果表明,饲养阶段日粮中添加复合蛋白酶可提高肉鸡ADG;在第一阶段可改善AME、DM、GE和氮沉积率和肠道形态。补充蛋白酶可提高出栏重、胸肌重和24 h pH,降低胸肌的滴水损失。低单宁高粱日粮与玉米日粮相比,对肉鸡性能的影响相近。Xu X Wang H L Pan L Ma X K Tian Q Y Xu Y T Long S F Zhang Z H Piao X S 2017饲料博览2017,0,1:2
2Overexpression of Serratia marcescens lipase in Escherichia coli for efficient bioresolution of racemic ketoprofen显示文摘Long Z D Xu J H Zhao L L 2007J Mol Catal B:Enzymatic2007,47,34:1
3Positive Feedback Investment Strategies and Destabilizing Rational Speculation显示文摘DE LONG J B SHLEIFER A SUMMERS L H 1990Journal of Finance1990,45,6:1
4The Synthesis of 2,3-Disubstituted-4-thiazolidones显示文摘 Long L M 1948J Am Chem Soc1948,70,:1
5Conserved roles for SLIT and ROBO proteins in midline commissural axon guidance 显示文摘Long H Sabatier C Ma L 2004Neuron2004,42,2:1
6CH4-CO2 reforming by plasma-challenges and opportunities显示文摘TAO X M BAI M G LI X LONG H L SHANG S Y YIN Y X DAI X Y 0,,02:1
7Improved Newton's method with exact line searches to solve quadratic matrix equation显示文摘Long J H Hu X Y Zhang L 2008Journal of Computational and Applied Mathematics2008,222,:1
8Implications of Land-use Change in Rural China:A Case Study of Yucheng, Shan- dong Province显示文摘Liu Y S Yang R Long H L 2014Land Use Policy2014,40,:1
9The maize epicuticular wax layer provides UV protection显示文摘Long L M Patel H P Cory W C 2002Functional Plant Biology2002,30,1:1
10The oestrogen receptor α gene is linked and/or associated with age of menarche in different ethnic groups显示文摘Long J Xu H Zhao L 0,,10:1
11Accelerated Restructu- ring in Rural China Fueled by ' Increasing vs Decreasing Balance' Land-use Policy for Dealing with Hollowed Vil- lages 显示文摘Long H L Li Y R Liu Y S 2012Land Use Policy2012,29,1:1
12Shifting and non-shifting fluorescence emitted by carbon nanodots 显示文摘LONG Y M ZHOU C H ZHANG Z L 2012Journal of Materials Chemistry2012,22,13:1
13Noise trader risk in financial markets显示文摘De Long J Shleifer A Summers L H 1990Journal of Political Economy1990,98,4:1
14Rural Resident's Attitudes Toward Recreation and Tourism Development显示文摘ALLEN L R H R HAFER P T LONG 1993Ournal of Travel Research1993,21,4:1
15Molecular evolution of Avian reovirus: evidence for genetic diverdity and reassortment of the S-class genome segment and multiple cocirculating lineage显示文摘Hung J L Long H L Hsiao W H 2003Virology2003,314,:1
16Improved Newton's method with exact line searches to solve quadratic matrix equation显示文摘Long J H Hu X Y Zhang L 0,,02:1
17Product service system configuration based on support vector machine considering customer perception 显示文摘LONG H J WANG L Y SHEN J 2013International Journal of Production Research2013,51,18:1
18Penglai zircon megacrysts:a potential new working reference for microbeam Determination of Hf-O isotopes and U-Pb age显示文摘Li X H Long W G Li Q L 2010Geostandards and Geoanalytical Research2010,34,2:1
19Rural Residents' Attitudes toward Recreation and Tourism Development 显示文摘ALLEN L HAFER H LONG R 1993Journal of Travel Research1993,31,4:1
20Oxygen and carbon precipitation in mutticrystalline solar silicon显示文摘Moiler H J Long L Werner M 1999Phys Status Solidi A: Appl Res1999,171,1:1
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