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琼脂床在烟草种子发芽势(率)检验中的应用(英文) 被引量:2
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作者 李振华 刘一灵 +2 位作者 陈航 陈尧 龙明锦 《农业工程学报》 EI CAS CSCD 北大核心 2012年第S2期270-273,共4页
为实现琼脂床代替纸床运用于烟草种子发芽势和发芽率的检验。以K326、云烟87和南江3号的裸种、引发种子和包衣种子为试验材料,采用梯度浓度的琼脂培养基制备发芽床,进行种子检验试验。结果表明:当琼脂浓度为0.55%时,琼脂床上的烟草种子... 为实现琼脂床代替纸床运用于烟草种子发芽势和发芽率的检验。以K326、云烟87和南江3号的裸种、引发种子和包衣种子为试验材料,采用梯度浓度的琼脂培养基制备发芽床,进行种子检验试验。结果表明:当琼脂浓度为0.55%时,琼脂床上的烟草种子萌发显著早于纸床(p<0.05)。当琼脂浓度大于1.65%时,裸种在9d后,包衣种在10d后,幼苗会出现萎蔫现象;在0.8%和1.1%的琼脂床上,3个品种3种类型种子发芽势和发芽率与传统纸床检验结果均无显著差异(p<0.05)。另外与传统纸床相比,琼脂床保水性好,在整个检验周期内无需再次补水,琼脂床吸附性较好,便于烟草种子点播,在轻微震动下种子也不易滚动,所以预先摆好的苗床不易被破坏,便于计数。 展开更多
关键词 种子 检验 烟草 琼脂床 发芽势 发芽率
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Dense Pellicular Agarose-Glass Beads for Expanded Bed Application: Flow Hydrodynamics and Solid Phase Classifications 被引量:3
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作者 周鑫 史清洪 +1 位作者 白姝 孙彦 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2004年第2期310-314,共5页
Two dense pellicular agarose-glass matrices of different sizes and densities, i.e., AG-S and AG-L, have been characterized for their bed expansion behavior, flow hydrodynamics and particle classifications in an expand... Two dense pellicular agarose-glass matrices of different sizes and densities, i.e., AG-S and AG-L, have been characterized for their bed expansion behavior, flow hydrodynamics and particle classifications in an expanded bed system. A 26 mm ID column with side ports was used for sampling the liquid-solid suspension during expanded bed operations. Measurements of the collected solid phase at different column positions yielded the particle size and density distribution data. It was found that the composite matrices showed particle size as well as density classifications along the column axis, i.e., both the size and density of each matrix decreased with increasing the axial bed height. Their axial classifications were expressed by a correlation related to both the particle size and density as a function of the dimensionless axial bed height. The correlation was found to fairly describe the solid phase classifications in the expanded bed system. Moreover, it can also be applied to other two commercial solid matrices designed for expanded bed applications. 展开更多
关键词 expanded bed dense pellicular medium solid phase classification size distribution density distribution
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