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非洲猪瘟下科学利用三元母猪提升复产效率 被引量:4
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作者 赵洋 张宏 +1 位作者 史济波 毛时明 《中国猪业》 2020年第4期28-30,共3页
当前,在非洲猪瘟疫情威胁背景下,猪场既面临生物安全的风险,还要面对种源紧缺的问题。猪场通过改变饲养模式或提高消毒水平等措施可不断强化生物安全保障能力,但种源问题却一时难以解决。伴随着养猪行情持续向好的态势,在这种特殊背景下... 当前,在非洲猪瘟疫情威胁背景下,猪场既面临生物安全的风险,还要面对种源紧缺的问题。猪场通过改变饲养模式或提高消毒水平等措施可不断强化生物安全保障能力,但种源问题却一时难以解决。伴随着养猪行情持续向好的态势,在这种特殊背景下,部分猪场开始将三元母猪作为种猪进行繁殖生产。但是,由于对三元母猪种用化的经验相对较少,一段时间以来,养猪人在利用三元母猪生产时出现了很多问题。利用三元母猪生产有哪些优缺点、该如何科学利用三元母猪来提升复产效率,笔者就以上2个方面的问题进行深入的剖析和探讨,以期为猪场科学高效利用三元母猪提供参考。 展开更多
关键词 非洲猪瘟 三元母猪 复产效率
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中小修技术在铝电解二次启动槽中的研究及应用
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作者 高宇 王新华 +2 位作者 张大信 吴传刚 段伟 《云南冶金》 2024年第2期176-180,共5页
针对大面积限电停槽现象频发和批量启动二次槽等问题,在铝电解二次启动槽中采用中小修技术,以提高复产效率、降低二次启动槽漏槽风险。采用中小修槽技术可以比大修槽节约人工费约16万元/台,减少材料投入约110万元/台,修槽周期比大修槽提... 针对大面积限电停槽现象频发和批量启动二次槽等问题,在铝电解二次启动槽中采用中小修技术,以提高复产效率、降低二次启动槽漏槽风险。采用中小修槽技术可以比大修槽节约人工费约16万元/台,减少材料投入约110万元/台,修槽周期比大修槽提前19天/台,复产效率及节约成本显著。 展开更多
关键词 铝电解 电解槽 二次启动 中小修 复产效率 节约成本
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The flocculation efficiency of compound bioflocculant by flocculant-producing bacteria 被引量:3
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作者 马放 王琴 +2 位作者 孟 路 徐旸 杨基先 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2006年第4期435-438,共4页
The flucculation efficiency of compound bioflocculant produced by flocculant-producing bacteria was investigated in this study. Cheap cellulose was selected as the substrate for the production of a lower cost bioflocc... The flucculation efficiency of compound bioflocculant produced by flocculant-producing bacteria was investigated in this study. Cheap cellulose was selected as the substrate for the production of a lower cost bioflocculant. The end product of cellulose decomposing bacteria was utilized as substrate for flocculant-producing bacteria. The optimum fermentation conditions were determined as follows: the initial fermentation and fermentation time was 5 d and 1 d respectively, the temperature was 30 ℃, the rotation speed was 120 r/min, the amount of CaCl2 solution ( 10% ) was 1.5 ml/L. The flocculation test indicated that the bioflocculant had high efficiency in the removal of the turbldity raw water from Songhua River. 展开更多
关键词 compound bioflocculant flocculant-producing bacteria flocculation efficiency
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Hedgerow Intercropping Maize or CowpealSenna for Drymatter Production in Semi-Arid Eastern Kenya
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作者 J. M. Kinama C. K. Ong +2 位作者 C. J. Stigter J. K. Ng'ang'a F. N. Gichuki 《Journal of Agricultural Science and Technology(B)》 2011年第3期372-384,共13页
In a long term study photosynthetically active radiation was monitored for three rainy seasons to measure the effects of hedgerow intercropping in rotation with maize and cowpea in a senna/siamea and panicum/grass str... In a long term study photosynthetically active radiation was monitored for three rainy seasons to measure the effects of hedgerow intercropping in rotation with maize and cowpea in a senna/siamea and panicum/grass strip on biomass yield and light use efficiency. Maize/cowpea intercropped with senna siamea or grass stripped were compared with sole maize and cowpea. A ceptometer was applied to measure PAR interception by sole maize or cowpea or crop/tree and grass/crop interfaces and separation of PAR used by each plant or tree/grass component. Hedgerow intercropping increased PAR interception and biomass formation. C4 plants had higher LUE than C3 plants while combining C4 and C3 in the agroforestry system lowered LUE. The tree/crop interfaces increased PAR interception than at 1 m and 2 m away from the hedgerow. The row of maize or cowpea at lm intercepted more PAR than the row at 2 m from hedgerow while the cowpea row next to the hedgerow was depressed compared to the rows in the middle rows which had higher yields. The maize or cowpea row next to the grass strip was more stressed than the rows in the middle of the alley. 展开更多
关键词 Hedgerows intercropping maize/cowpea yield light use efficiency.
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