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氮素营养对不同产地菘蓝的干物质积累、根外形品质及光合作用的影响 被引量:12
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作者 吕婷婷 施晟璐 +5 位作者 唐晓清 林志超 赵江涛 周海凤 李臻颖 王康才 《南京农业大学学报》 CAS CSCD 北大核心 2015年第3期395-401,共7页
[目的]探讨不同氮素处理水平对菘蓝干物质积累、根外形品质及光合作用的影响,为其栽培生产中最佳施氮形态及比例提供理论基础。[方法]以5个产地的菘蓝植株为材料,采用田间小区试验,设7个处理:不施氮、硝态氮(NO-3-N)、铵态氮(NH+4-N)、N... [目的]探讨不同氮素处理水平对菘蓝干物质积累、根外形品质及光合作用的影响,为其栽培生产中最佳施氮形态及比例提供理论基础。[方法]以5个产地的菘蓝植株为材料,采用田间小区试验,设7个处理:不施氮、硝态氮(NO-3-N)、铵态氮(NH+4-N)、NH+4-N/NO-3-N=75/25、NH+4-N/NO-3-N=50/50、NH+4-N/NO-3-N=25/75和酰胺态氮,分析比较了不同产地植株的生长指标、叶绿素含量及光合相关参数等指标的差异性。[结果]铵、硝态氮混合(NH+4-N/NO-3-N=75/25和NH+4-N/NO-3-N=50/50)施用有利于陕西商洛菘蓝的生长,而甘肃张掖菘蓝则在全铵态氮和酰胺态氮处理下,地下部生物量及总生物量的积累效应大。酰胺态氮处理有利于促进安徽亳州、甘肃张掖、安徽阜阳和山西运城菘蓝地下部干物质的积累。甘肃张掖菘蓝与陕西商洛菘蓝的主根直径和侧根数分别在NH+4-N/NO-3-N=25/75和NH+4-N/NO-3-N=50/50处理时最大。与对照相比,氮素处理能有效提高菘蓝叶片的叶绿素含量,其中对安徽阜阳菘蓝的促进作用最强,且全硝处理时其叶绿素含量最大。氮素处理也有利于提高菘蓝的净光合速率、气孔导度、胞间CO2浓度和蒸腾速率,其中陕西商洛菘蓝的光合相关参数最高。[结论]不同产地植株对氮素处理的响应存在较大的差异,建议生产中应根据不同产地采取不同的施氮处理。 展开更多
关键词 菘蓝 氮素处理 干物质积累 外形品质 光合作用
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颗粒形绿茶的物理特性与外形品质关联性 被引量:4
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作者 郭丽 余方林 +5 位作者 赵锋 张悦 朱荫 戴伟东 董春旺 林智 《食品科学》 EI CAS CSCD 北大核心 2020年第19期25-30,共6页
颗粒形是绿茶机械化采制的优选造型,揭示颗粒形绿茶的物理特性与外形品质因子的相关性,对于绿茶机械化加工与品质调控具有重要的意义。本研究以8份颗粒形绿茶和1份卷曲形绿茶为材料,采用人工感官审评筛选出具有代表性的颗粒形绿茶,进而... 颗粒形是绿茶机械化采制的优选造型,揭示颗粒形绿茶的物理特性与外形品质因子的相关性,对于绿茶机械化加工与品质调控具有重要的意义。本研究以8份颗粒形绿茶和1份卷曲形绿茶为材料,采用人工感官审评筛选出具有代表性的颗粒形绿茶,进而利用计算机视觉技术、量筒法、质构仪法分析茶样的颜色和形状特征以及容重、百粒质量、弹性和塑性等物理特性,运用多元逐步回归分析(multiple stepwise regression analysis,MSRA)法分析各参数与外形品质因子的关联性。结果表明,‘勾青’茶的外形品质因子得分在85分以上,具有较好的形状品质与整齐度,可作为颗粒形绿茶的典型代表。随原料成熟度的增加,‘勾青’茶的红色通道值、绿色通道值、蓝色通道值、亮度与饱和度减小,色调值增大,叶色由黄绿转为深绿;圆形度和形状指数增大,容重下降,百粒质量升高,且最高达33.1 g;塑性减弱,其与弹性的比值达1.5。不同物性指数与颗粒形绿茶的外形品质的相关性存在差异,MSRA结果显示蓝色通道值、色调值、弹性、塑性和圆形度对颗粒形绿茶外形品质的影响较明显;色调值、弹性对其形状品质、色泽品质起负作用,蓝色通道值、圆形度只与整齐度有相关性。细化颗粒形绿茶的外形品质因子,针对性地研究单项品质子的主导因素,更有利于体现不同物性指标的贡献。 展开更多
关键词 绿茶 颗粒形绿茶 外形品质 物理特性 形状品质 整齐度 色泽品质
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提高婺绿外形品质的浅见
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作者 詹成业 《蚕桑茶叶通讯》 1989年第1期23-25,共3页
婺绿有其悠久的历史。婺源得天独厚的自然环境滋润着茶树的生长发育,促成婺绿品质“颜色碧而天然,口味香而浓郁,水叶青而润厚”,有“美夷香味”,成为我国的上等绿茶,深受消费者的欢迎。
关键词 绿茶 婺绿 外形品质 制茶
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中黄1号鲜叶适制绿茶滋味特征及工艺优化
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作者 郭丽 潜卫东 +5 位作者 李强 胡日上 胡兆华 叶伟胜 郑阿萍 林智 《浙江农业科学》 2021年第10期2063-2066,共4页
采用一芽二叶标准的中黄1号鲜叶制作颗粒形绿茶、红茶和黄茶以及扁形和针形绿茶,结合样品的滋味特征筛选其适制茶类及外形,并优化关键工艺参数。结果表明,中黄1号茶鲜叶较适于加工绿茶,且颗粒形绿茶的滋味品质较优。优化颗粒形绿茶的杀... 采用一芽二叶标准的中黄1号鲜叶制作颗粒形绿茶、红茶和黄茶以及扁形和针形绿茶,结合样品的滋味特征筛选其适制茶类及外形,并优化关键工艺参数。结果表明,中黄1号茶鲜叶较适于加工绿茶,且颗粒形绿茶的滋味品质较优。优化颗粒形绿茶的杀青和做青工艺参数,分析在制品的含水量、容重及外形品质,确定杀青工艺宜采用温度和投叶量分别是220~230℃和33 kg·h^(-1),做形工艺宜采用的温度和投叶量分别是170~180℃和3.0 kg·锅^(-1)。 展开更多
关键词 中黄1号 绿茶 颗粒形绿茶 滋味品质 外形品质
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Importance of Touch in the Design of Pleasurable Products and Experiences
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作者 Nicolas Bouché Sébastien Crochemore 《Journal of Donghua University(English Edition)》 EI CAS 2004年第3期130-133,共4页
Today, the act of purchase is more and more irrational. Customers’ choices are based on emotional and multisensorial features, particularly on touch, which is the most emotional sense. Then it is essential in the des... Today, the act of purchase is more and more irrational. Customers’ choices are based on emotional and multisensorial features, particularly on touch, which is the most emotional sense. Then it is essential in the design process to work on shapes, materials, textures to make users living pleasant experiences in all contact areas of the product. It’s also essential to consider the dynamic aspect of touch to follow the body and generate pleasant tactile effects. Finally, how can we introduce touch in the design process considering companies’ know-how, culture and subjectivity of each actor of new product creation? 展开更多
关键词 Design of contact areas Touch physiology Touch psychology Design for senses Touch description Design of clothes Body fitting
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Effect of Long-Term in Vitro Sub-culturing on Quality Degeneration of Sweet Potato Varieties: Morpho- Anatomic Assessment and Simple Sequence Repeats Analysis
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作者 Mihiretu Cherinet Hundayehu Elsa Du Toit +3 位作者 Sunette Laurie Martin Steyn Ria Greyling Nokuthula Myeza 《Journal of Agricultural Science and Technology(A)》 2014年第10期811-821,共11页
The aim of this study was to assess the effect of long-term in vitro sub-culturing on the varietal degeneration of three sweet potato varieties, namely, Monate, Mokone and Ndou which were sub-cultured for 32, 23 and 1... The aim of this study was to assess the effect of long-term in vitro sub-culturing on the varietal degeneration of three sweet potato varieties, namely, Monate, Mokone and Ndou which were sub-cultured for 32, 23 and 12 generations, respectively. Each generation was cultured in a media which is made from 4.43 g/L Murashige and Skoog (MS), 30 g/L sucrose and 2 g/L gelrite, respectively, and grown under 16 h light and 8 h dark photoperiod for 30 d. For each generation, 45 plantlets were acclimatized for two months in a glasshouse. Data on in vitro growth performance and 11 morphological characteristics during acclimatization were recorded. Early root and shoot formation was observed after the 27th and 21st sub-cultured generations of Monate and Mokone, respectively. During acclimatization, plantlets from the same variety showed differences in morphological traits such as leaf colour, abaxial leaf pigmentation, vine pigmentation, petiole pigmentation, leaf wrinkling and flowering. However, the rate of these morphological differences is random and irrespective to increase in sub-culturing. Therefore, to understand the genetic base of these morphological variability, two plantlets from each variety were subjected to genetic analysis by using five simple sequence repeat (SSR) primers (IB-242, IB-318, IB-255F, 1B-248 and IB-255). Although SSR loci IB-255F and IB-318 could distinguish between the three varieties, there were no allelic polymorphisms detected in plantlets from the same varieties. Therefore, long-term sub-culturing do not leads to quality degeneration in the three sweet potato varieties. 展开更多
关键词 MICRO-PROPAGATION ORGANOGENESIS SUB-CULTURE true-to-type morphology polymorphism.
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Sensory quality evaluation for appearance of needle-shaped green tea based on computer vision and nonlinear tools 被引量:15
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作者 Chun-wang DONG Hong-kai ZHU +3 位作者 Jie-wen ZHAO Yong-wen JIANG Hai-bo YUAN Quan-sheng CHEN 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2017年第6期544-548,共5页
Tea is one of the three greatest beverages in the world. In China, green tea has the largest consumption, and needle-shaped green tea, such as Maofeng tea and Sparrow Tongue tea, accounts for more than 40% of green t... Tea is one of the three greatest beverages in the world. In China, green tea has the largest consumption, and needle-shaped green tea, such as Maofeng tea and Sparrow Tongue tea, accounts for more than 40% of green tea (Zhu et al., 2017). The appearance of green tea is one of the important indexes during the evaluation of green tea quality. 展开更多
关键词 芽形绿茶 外形品质 图像特征 非线性建模 极限学习机(ELM)
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