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白鸡冠半同胞系(F1代)叶片主要性状及光合特征分析 被引量:3
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作者 陈常颂 王峰 +6 位作者 陈玉真 单睿阳 王秀萍 林郑和 钟秋生 陈志辉 余文权 《茶叶科学》 CAS CSCD 北大核心 2016年第5期452-460,共9页
以白鸡冠半同胞系F1代中25个新品系(11个黄白化新品系和14个绿叶新品系)为研究对象,观测茶树新梢生物量、生育期、叶片功能性状及光合性能,并分析两类茶树新品系之间的差异。结果表明:与母本白鸡冠相比,25个新品系新梢生物量均增加... 以白鸡冠半同胞系F1代中25个新品系(11个黄白化新品系和14个绿叶新品系)为研究对象,观测茶树新梢生物量、生育期、叶片功能性状及光合性能,并分析两类茶树新品系之间的差异。结果表明:与母本白鸡冠相比,25个新品系新梢生物量均增加(15号和24号除外),增幅为25.0%-106.25%,一芽三叶期提前(早、中生种比例达84%);黄白化新品系叶片面积(LA)和比叶面积(SLA)明显增加,干物质含量(LDMC)则明显降低,其他指标变化不明显;绿叶新品系叶片面积(LA)和光合色素指标均明显增加,其他指标变化趋势不明显。此外,黄白化新品系叶片的LA和光合色素指标平均值显著低于绿叶新品系,而叶片的SLA、Chla/Chlb和Car/Chl比值平均值显著高于绿叶新品系。黄白化新品系叶绿素含量平均值仅为绿叶新品系的42.29%,但各项光合性能指标并未下降(只有3号和6号光合色素过低时显著下降),说明该黄白化新品系在一定叶绿素含量范围内,单位叶绿素的光合效率较高,可能是对叶绿素含量低的一种生理补偿,有待进一步从生理和分子方面深入研究。 展开更多
关键词 白鸡冠半同胞系 黄白品系 叶片功能性状 光合特征
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Series Design of Large-Scale NC Machine Tool
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作者 TANG Zhi 《Journal of China University of Mining and Technology》 EI 2007年第2期272-276,共5页
Product system design is a mature concept in western developed countries. It has been applied in war industry during the last century. However,up until now,functional combination is still the main method for product s... Product system design is a mature concept in western developed countries. It has been applied in war industry during the last century. However,up until now,functional combination is still the main method for product system de-sign in China. Therefore,in terms of a concept of product generation and product interaction we are in a weak position compared with the requirements of global markets. Today,the idea of serial product design has attracted much attention in the design field and the definition of product generation as well as its parameters has already become the standard in serial product designs. Although the design of a large-scale NC machine tool is complicated,it can be further optimized by the precise exercise of object design by placing the concept of platform establishment firmly into serial product de-sign. The essence of a serial product design has been demonstrated by the design process of a large-scale NC machine tool. 展开更多
关键词 large-scale NC machine tool series product design optimized design
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