为研究日粮营养水平对中速型黄羽肉鸡屠宰性能和胴体品质的影响,选用甘肃黄鸡做了0-4周龄、5-14周龄2期饲养试验,营养水平按中国肉用仔鸡饲养标准（1986）的100%、90%和80%,第1期试验设A、B、C组,第2期将B组分为BH（中高）、B（中）、B...为研究日粮营养水平对中速型黄羽肉鸡屠宰性能和胴体品质的影响,选用甘肃黄鸡做了0-4周龄、5-14周龄2期饲养试验,营养水平按中国肉用仔鸡饲养标准（1986）的100%、90%和80%,第1期试验设A、B、C组,第2期将B组分为BH（中高）、B（中）、BL（中低）组后共设5组。结果表明,各屠宰性能的绝对指标均以A组最高,除腿肉重和腹脂重外,A组与B组、BL组及C组差异显著（P〈0.05）,而其他组间无显著差异（P〉0.05）。相对指标中,屠宰率、半净膛率、腹脂率以A组最高,A组与BL组差异显著（P〈0.05）,其余指标组间差异均不显著（P〉0.05）。随营养水平升高,腹脂率和胸肌干物质含量表现出升高的趋势,胸肉失水率表现出降低的趋势。不论胸肉还是腿肉,45 min和24 h pH、干物质含量、失水率及系水力组间差异均不显著（P〉0.05）。展开更多
We study the evolution of spectral intensity and degree of coherence of a new class of partially coherent beams,Hermite non-uniformly correlated array beams,in free space and in turbulence,based on the extended Huygen...We study the evolution of spectral intensity and degree of coherence of a new class of partially coherent beams,Hermite non-uniformly correlated array beams,in free space and in turbulence,based on the extended Huygens–Fresnel integral.Such beams possess controllable rectangular grid distributions due to multi-self-focusing propagation property.Furthermore,it is demonstrated that adjusting the initial beam parameters,mode order,shift parameters,array parameters and correlation width plays a role in resisting intensity and degree of coherence degradation effects of the turbulence.展开更多
文摘为研究日粮营养水平对中速型黄羽肉鸡屠宰性能和胴体品质的影响,选用甘肃黄鸡做了0-4周龄、5-14周龄2期饲养试验,营养水平按中国肉用仔鸡饲养标准（1986）的100%、90%和80%,第1期试验设A、B、C组,第2期将B组分为BH（中高）、B（中）、BL（中低）组后共设5组。结果表明,各屠宰性能的绝对指标均以A组最高,除腿肉重和腹脂重外,A组与B组、BL组及C组差异显著（P〈0.05）,而其他组间无显著差异（P〉0.05）。相对指标中,屠宰率、半净膛率、腹脂率以A组最高,A组与BL组差异显著（P〈0.05）,其余指标组间差异均不显著（P〉0.05）。随营养水平升高,腹脂率和胸肌干物质含量表现出升高的趋势,胸肉失水率表现出降低的趋势。不论胸肉还是腿肉,45 min和24 h pH、干物质含量、失水率及系水力组间差异均不显著（P〉0.05）。
基金the National Key Research and Development Program of China(Grant No.2019YFA0705000)the National Natural Science Foundation of China(Grant Nos.91750201,11525418,11947240,11974218,12004218,and 11904087)+1 种基金the Local Science and Technology Development Project of the Central Government(Grant No.YDZX20203700001766)Innovation Group of Jinan(Grant No.2018GXRC010)。
文摘We study the evolution of spectral intensity and degree of coherence of a new class of partially coherent beams,Hermite non-uniformly correlated array beams,in free space and in turbulence,based on the extended Huygens–Fresnel integral.Such beams possess controllable rectangular grid distributions due to multi-self-focusing propagation property.Furthermore,it is demonstrated that adjusting the initial beam parameters,mode order,shift parameters,array parameters and correlation width plays a role in resisting intensity and degree of coherence degradation effects of the turbulence.
