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总饲料量
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     The comprehensive and total feed efficiency of PSB were 2 75 and 7 33 separately, and had very significant difference between PSB and other three groups of beef bulls ( P <0 01).
     饲料消耗以皮西本最少 ,每增重 1kg消耗精料、总饲料量分别为 2 .75 kg、7.33kg;
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     Quick determination of total fluorine in feed
     饲料氟的快速测定
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     Determination of total arsenic in feeds with atomic fluorescent spectrum method
     饲料砷的测定——原子荧光光谱法
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     The Concept and Judement of Feeds Resources Quantity
     饲料资源概念及其判断
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     INVESTIGATION ON THE FEED SELENIUM CONTENT IN GUIZHOU PROVINCE
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     The Coulometric Method Determinating Total Alkalinity of Soda
     库仑滴定法测定纯碱
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An experiment on the effect of early weaning of piglets was conducted on a small scale, which lasted for two years. The piglets of the treatment group were weaned at 3 weeks old and those of the control group at 6 weeks old. An enlarged experiment with 50 litters was also carried out in a similar way.

为使母猪由年产不足2胎提高到年产2.5胎左右,同时在不增加总饲料量和总费用的前提下,有效地增殖仔猪头数,自1980年开始,连续进行了两年母猪繁殖力的小群对比试验,试验组仔猪于3周(21日)龄断奶,对照组仔猪于6周(42日)龄断奶。1983年进行了仔猪3周龄断奶生产示范性的中间试验。 试验证明,在不用任何乳制品及油脂类饲料的条件下,母猪每胎的产仔数、仔猪成活数及生长速度等各项指标,均不受哺乳期长短的影响,两组间无显著差异(P>0.05)。仔猪于3周龄断奶时,母猪可年产2.5胎,每头母猪年产体重20千克的仔猪数,试验组约为22头,对照组约为16头,两组差异极显著(P<0.01)。此外,3周龄断奶的每头母猪比年产2胎的母猪每年还可增加经济收益90元左右。

The body weight gain, body size parameters and feed efficiency of the crossed beef from 6 month old to 12 month old were measured and analyzed. Crossbred beefs were progeny of Piemontese×simmental×local yellow cattle (PSB), Limousin×simmental×local yellow cattle (LSB), Charolais×Simmental×local yellow cattle (CSB) and Simmental×Simmental×local yellow cattle (SSB). Results showed that their body weights of 12 month old were 454 30±61 90 kg,412 00±37 60 kg,401 50±42 70 kg and 389 20±46 76 kg separately;...

The body weight gain, body size parameters and feed efficiency of the crossed beef from 6 month old to 12 month old were measured and analyzed. Crossbred beefs were progeny of Piemontese×simmental×local yellow cattle (PSB), Limousin×simmental×local yellow cattle (LSB), Charolais×Simmental×local yellow cattle (CSB) and Simmental×Simmental×local yellow cattle (SSB). Results showed that their body weights of 12 month old were 454 30±61 90 kg,412 00±37 60 kg,401 50±42 70 kg and 389 20±46 76 kg separately; daily body weight gains were 1 22±0 19 kg, 1 10±0 12 kg,0 97±0 13 kg and 0 90±0 16 kg respectively; relative growth rates were 97 65%?95 84%?81 32% and 72 80% respectively. PSB, CSB and LSB had a higher growth rate and their body weights and body size were significantly larger than SSBs ( P <0 01). The comprehensive and total feed efficiency of PSB were 2 75 and 7 33 separately, and had very significant difference between PSB and other three groups of beef bulls ( P <0 01). All these beef had a better beef type based on their indexes of body size, and had no significant difference between those of 6 months and 12 months old( P >0 05).

研究分析了皮西本、利西本、夏西本、西杂二代肉用公牛 6~ 12月龄生长发育情况。结果表明 ,12月龄体重分别为 (45 4 .30± 6 1.90 ) kg、(412 .0 0± 37.6 0 ) kg、(40 1.5 0± 4 2 .70 ) kg、(389.2 0± 4 6 .76 ) kg;平均日增重为 (1.2 2± 0 .19) kg、(1.10± 0 .12 ) kg、(0 .97± 0 .13) kg、和 (0 .90± 0 .16 ) kg;相对增长率为 97.6 5 %、95 .84 %、81.32 %和 72 .80 %。皮西本、利西本和夏西本的增重速度和体尺发育均比西杂二代有较大幅度的提高 ,且差异极显著 (P<0 .0 1)。饲料消耗以皮西本最少 ,每增重 1kg消耗精料、总饲料量分别为 2 .75 kg、7.33kg;利西本次之 ,分别为 2 .87kg和 7.6 6 kg,与西杂二代差异极显著 (P<0 .0 1)。从体尺指数来看 ,各组肉牛都具有较好的肉用体型 ,各组间差异不显著 (P>0 .0 5 )

 
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