光质和光强对红树莓组培苗叶绿素荧光参数的影响     

郭芳  王超  刘海鹏  李保国  张雪梅  齐国辉 《北方园艺》2016,(11):19-23

为了确立红树莓组培苗生长的适宜光质和光强,以红树莓"海尔特兹"组培苗为试材,研究了不同光质和光强处理下红树莓生根组培苗的叶绿素含量及叶绿素荧光参数。结果表明:光质处理中,除R/B(红光∶蓝光=1∶1)处理外,Chl a(叶绿素a)、Chl b(叶绿素b)和Ct(叶绿素总含量)均随着R/B比率的增加呈现先增加后减小的趋势,Chl a和Ct均在2R/B(红光∶蓝光=2∶1)处理下呈现最大值,分别为1.344、1.716mg·g~(-1),Chl b则在R/2B(红光∶蓝光=1∶2)处理最高,为0.423mg·g~(-1),Chl a、Chl b和Ct均以10R/B(红光∶蓝光=10∶1)处理最低,分别为0.130、0.033、0.163mg·g~(-1),均显著低于其它光质;Chl a/b(叶绿素a/b)在10R/B、2R/B和R/B处理下较高,分别为3.942、3.709、3.653,呈现阳生植物的特性,而在6R/B(红光∶蓝光=6∶1)、W(白光)、4R/B(红光∶蓝光=4∶1)等处理下较低,分别为2.729、2.730、2.747,呈现阴生植物的特性;在R/2B处理下,红树莓组培苗叶片的叶绿素荧光参数值表现极优,Fv/Fm(PSⅡ最大光化学效率)值达到0.881,而10R/B处理下,Fv/Fm值降低到0.355,且显著低于其它光质处理;光强处理中,随着光强的增加,Chl a、Chl b和Ct呈现递减的趋势,最大值由1.218、0.503、1.720mg·g~(-1)分别降低到0.907、0.302、1.209mg·g~(-1),均形成显著差异,Chl a/b则表现为随着光强的增加而增加,在2 000lx处理达到最大值,为3.042,且3种光强处理差异显著;叶片的Fo(初始荧光)随着光强的增加而增加,在2 000lx处理下达到最大值,为180.000,Fm(最大荧光值)则在1 500lx处理下达到最大值,为907.000,而叶片的Fv/Fm、Fv/Fo(PSⅡ的潜在活性)、ΦPSⅡ(PSⅡ实际光化学效率)、Rfd(可变荧光下降比值)则均随着光强的增加呈现递减的趋势,均在1 000lx处理下呈现最大值,分别为0.847、5.573、0.815、4.200。  相似文献   

不同品种芹菜品质指标测定及其聚类分析     

隋璐  刘维信  杨建明  唐超  易晓华 《北方园艺》2016,(23):6-10

以12个不同品种的芹菜为试材,对其可溶性糖、可溶性固形物、叶绿素、维生素C、硝酸盐、纤维素、蛋白质、氨基酸、微量元素、芹菜素含量等10个营养品质性状进行了测定,采用聚类分析对其进行比较。结果表明:不同品种的芹菜在营养品质方面不尽相同,其中"鲍芹"营养成分丰富,维生素C、芹菜素含量极高,适合食用。试验初步明确了各品种芹菜营养成分,为进一步开发芹菜的应用价值提供理论依据。  相似文献   

不同树莓品种叶片解剖结构与抗旱性的关系   总被引：1，自引：0，他引：1  

桂毓  刘婷  杨静慧  史滟滪  张超  刘太林 《北方园艺》2016,(21):36-40

以树莓叶片为试材,分析了叶片的厚度气孔密度和表皮细胞、表皮毛、栅栏组织、海绵组织、保卫细胞等叶解剖结构,比较了不同树莓品种的抗旱性。结果表明:"凯欧"和"莎妮"的叶片最厚,"加拿大黑莓"次之,其次是"南方黑树莓""海尔特兹"的叶片最薄;"凯欧"的上下表皮、栅栏组织均最厚,其次是"莎妮""加拿大黑莓"和"南方黑树莓"居中,"海尔特兹"最薄;"凯欧"和"莎妮"的气孔密度均最大,"加拿大黑莓"和"南方黑树莓"居中,"海尔特兹"最小;隶属函数综合分析发现,5个树莓品种中"凯欧"的耐旱性最强,其次是"莎妮",再次是"南方黑树莓"和"加拿大黑莓";"海尔特兹"的耐旱性最弱。  相似文献   

曲拉通和硝酸混合溶液直接提取快速测定草鱼中铅含量     

杨静  孙娟  宗超  沈媛  李英  贾晨  吴仑  陈翔 《中国动物检疫》2023,40(4):130-135

为建立快速测定草鱼中铅含量的方法,通过分析曲拉通和硝酸混合溶液浓度、提取时间、称样定容体积比例等因素的影响,以及基体改进剂的使用效果,确定了草鱼中铅元素提取测定的最佳条件。验证结果显示：采用曲拉通和硝酸混合溶液提取草鱼中铅元素方法的提取率为86.5%～95.6%,加标回收率为91.5%～95.6%,精密度均小于4.0%,检出限和定量限分别为0.011和0.032 mg/kg,满足了国家标准GB 5009.12—2017第一法石墨炉原子吸收光谱法的要求。与国家标准方法比较,本研究建立方法的样品前处理时间从4～12 h缩短至0.2 h内,酸试剂用量从湿法消解的7～12 mL减少至1～2 mL;前处理过程无需高温消解,无需其他前处理设备,避免了样品污染和待测元素损失,实现了降低分析成本以及保护环境和试验人员的目的。结果表明,该方法是一种简单、准确、绿色、快速测定草鱼中铅含量的方法,尤其适合大量样品检测。  相似文献   

ON STUDY DIGGED FIELD MOVEMENT''S LAW BY EXPERIMENTAL METHOD OF LASER HOLOGRAPHIC MOIRE INTERFERMETRY     

Wang Baichu Hu Guohua Chao Zhen Xu Guangming Cheng Yanssong 《保鲜与加工》1990,(1):96-101

The high-precision displacement measuring technology of optic-measuring mechanics is, for the first time,successfully applied on the similar model of the model land-layer with a new-type variable modulus of elasticity. The angle of movement and the distributed displacement of upper and lower rock-layers are measured. The technology is a combination of laser's technology and the modern chemical sticker-it is called the sticking moire interferometry. Compared with the measured values, the result is very satisfactory.  相似文献   

Reuolution and Research of Green Automobile     

RAN Zheng -y  TIAN Long  NI Ling  YANG Chao  CAO Wen -ming 《保鲜与加工》2002,(7):15-19

The green is as a symbol of no pollution,no public harm and environmental protection. The green automobile is the inevitable results that the automobile technique continuously developes. A new style vehicle--the green automobile is the urgent solicit of environmental protection is developed. The automobile industry can develop continuously. This article mainly discusses the importance of the green auto_mobile's research and development,the development status in quo and prospect of the green auto_mobile technique in the world,and states the relationship between the green automobile technique and environmental protection from green technical system theoretically clarify the study of green automobile,including its design and the system,the manufacture and its technology,the energy,the rebuild engineering and a series of subjects. How to evaluate the cycle and the evaluable mark of the green automobile,the prospect of green automobile are pointed out.  相似文献   

Dynamics of Actin Polymerization     

CHENG Chao  WANG Yuan-liang  ZHANG Jun  QIN Su-Hua 《保鲜与加工》2005,(4):131-135

The process of actin polymerization and depolymerization have some relation with its function,the activation of such process is compatible to its functions. The polymerization progress is divided into four steps: The first step is the activation of the monomer actin. The nucleation of actin nucleus forms in the second step which limits the polymerization speed. The elongation of the F-actin filaments happens in the following step. In the last step, a steady-state is attained, the length of the filament does not change because the polymerizing rate in the barbed end is the same with the depolymerizing rate in the pointed end. Some factors which affect the polymerizing process, such as nucleotide, actin related proteins are discussed. The aim is to know more about how to assemble the complicated system with biomacromolecule and what to function.  相似文献   

Melt Flow in Alloy Melted Pool Under the Action of Laser     

Liu Jianglong Liu Chao 《保鲜与加工》1993,(5):109-114

Melt flow in the course of laser alloying is considered on the basis of mechanics. The findings show that the melt flow in laser alloying pool is mainly controlled by two action forces,i. e. the surface tension force on alloying pool.surface,caused by the temperature difference on the pool surface and the buoyancy force in alloying pool caused by the temperature difference in the horizontal direction in the melt pool. These two forces differ in their acting areas. The analysis of the Bond dimensionless number used for laser alloying shows that the two force actions are in the same order,and almost equal under the certain condition.  相似文献   

The Effect Factor of Surface Tension of Liquid/Vapor in Molecular Dynamics Simulation     

LIU Chao  ZENG Dan ling 《保鲜与加工》2002,(4):76-78

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Detecting Technology of Cabel Surface Defect Based on DSP and Image Recognition     

GAO Chao  REN Ke  GUO Yong-cai  YANG Hui 《保鲜与加工》2007,(9):36-38

The damage of bridge cable directly hazards the normal use of bridge and the safety of people. The paper discussed the signal acquisition and detection system which takes embedded DSP processor as core technology, combined with CCD, video decode chip, SDRAM, FLASH ROM, and established the fast measuring algorithm of the surface corrosion and damage, which includes deteminating the processing region, improving medium filter, sobel edge detection and dynamic threshold segment, close operation of morphology, computing defect area and saving. The experimental resuits show that this method implemented the real-time, non-contact and intelligence detecting of cable surface defect and gives the specifications of the system.  相似文献