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王明海 《金陵科技学院学报》2002,18(3):73-75
选择 37周龄健康无病商品代罗曼蛋鸡 2 88只 ,随机分成试验组和对照组 ,每组 1 44只 ,两组基础日粮和饲养管理相同 ,试验组添加复合酶 1kg·t- 1 ,试验期 5周。试验结果表明 :在蛋鸡饲料中添加复合酶 ,能显著提高产蛋率、饲料利用率、蛋白粘稠度和经济效益 ,同时对增加蛋壳厚度也有一定的效果 相似文献
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以黄熟期麦秸和无烟煤为对象,利用单因素和三因素四水平正交设计试验方法,研究不同碱化剂质量分数、热处理时间以及固液质量配比对麦秸型煤力学强度的影响。结果表明:随着碱化剂质量分数的增加、热处理时间的延长和固液配比的升高,麦秸型煤的抗压强度和跌落强度均呈先升高后降低的趋势。正交试验发现影响麦秸型煤样品粘结性的主要因素为碱化剂质量分数,其次为热处理时间和固液配比,且在碱化处理过程中不同影响因素之间存在较强交互作用。麦秸型煤碱化处理的最优工艺为:碱化剂质量分数2%,热处理时间1.5h,固液配比1∶25。 相似文献
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The physicochemical and nutritional quality of four chalky mutants (JM1-4) rice and their parent 93-11 were investigated. JM1 and JM4 are white-belly mutants, and JM2 is white-core mutant, while JM3 is floury mutant. JM2 is also a high amylose mutant with AAC of 29%. JM3 had the lipid content nearly three times of the parent, so it is also a high lipid mutant. JM1 had similar pasting viscosities with the parent, while JM2 and JM3 had smaller breakdown and setback than 93-11. JM2 had lower enthalpy of gelatinization, but higher enthalpy of retrogradation, so it had highest retrogradation percentage. JM3 had the highest accumulation of amino acids, fatty acids, and some major mineral elements such as P, K, Mg and Ca. The amino acids and fatty acids had negative correlation with PV, HPV and CPV. The pleiotropic effects caused by the mutations on starch and lipid metabolism deserve further investigation. 相似文献
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