GA3和PP333对萝卜生长及产量的影响     

应冬勤  陈旦蕊  苏士法  郑春明 《中国农学通报》2007,23(6):363-363

通过研究不同浓度的GA3和PP333及两激素不同浓度的互作对萝卜叶面积、叶重量、叶子叶绿素含量及根冠比的影响。结果表明，两者对叶子叶绿素含量没明显影响，但GA3在促进叶子的生长，叶面积的增大上以10~30ppm效果最好，而PP333虽然能抑制叶子的生长，但在肉质根生长中后期试用50ppm浓度的PP333，抑制了叶子的生长，反而促进了光合产物输送到肉质根，起到增产的作用。适当浓度的GA3和PP333及两者结合增产效果明显  相似文献   

湿地松优良半同胞家系蛋白质及糖类对水分胁迫的生理响应   总被引：3，自引：0，他引：3  

童方平  方伟  马履一  宋庆安  龙应忠  吴际友  易霭琴  程勇 《中国农学通报》2006,22(12):459-459

为研究湿地松优良半同胞家系蛋白质及糖类对水分逆境的生理响应，采用盆栽试验和吸光度测定结合的方法，以湿地松普通种子为对照（CK），测定了七个湿地松半同胞家系在正常水分状态（土壤相对含水量为70%）、弱度水分胁迫（土壤相对含水量为55%~60%）、中度水分胁迫（土壤相对含水量为35%~40%）和强度水分胁迫（土壤相对含水量为20%~25%）条件下的可溶性蛋白质、还原性糖、可溶性糖的含量，研究结果表明：无论是不同水分梯度还是不同家系水平，蛋白质、还原性糖、可溶性糖含量的差异均达极显著性水平。随着水分胁迫程度的加剧，各家系蛋白质含量呈先升后降的趋势，在水分胁迫初期，各家系蛋白质含量增加，水分胁迫中、后期各家系蛋白含量呈直线下降；随着水分胁迫的加剧，各家系还原性糖、可溶性糖含量呈直线上升。家系1027、101、464在水分胁迫条件下具有较高的可溶性糖含量，其抗旱性较其它家系要强，是这三个家系速生、高产的生理原因之一。  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   

Linear Disposal of Wheatstone Bridge in Strain Measurement     

WEN Cheng  QIN Shu-ren 《保鲜与加工》2004,(1):28-31

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Biomechanics Behavior of Pig''s Small Intestines     

WU Jiang-hong  Cheng Xi-yun  WEI Yun-long  ZHU Yong-qing  ZHOU Yin-sheng  XU Shi-rong 《保鲜与加工》2001,(2):9-11

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Study on DAQ System by Using LabVIEW     

YANG Zhong-ren  RAO Cheng  ZOU Jian  PENG Zhen-liane Ministry of Education  Chongqing  Chin 《保鲜与加工》2004,(2):32-35

Dong village is very valuable for research work because of its special regional and national character and rich cultural implication. In this paper, some information about the location, form and features of Dong village is given. Then, the relationship between the culture and the settlement is analyzed, which provides a clue for understanding Dong village and will be beneficial to creating modern human settlements.  相似文献   

Computer Simulation for Analysing the Melting Action of Mould Powders During Continuous Casting     

WU Cheng bo  ZHENG Bin  WANG Qian 《保鲜与加工》2002,(10):5-8

When analysing the performance of casting powders in a specific casting machine, the thickness of liquid slag is a very important parameter. If the liquid slag thickness is not kept above a certain minimum value during the continuous casting operation,the surface and internal quality of the cast products will be jeopardised because lubrication between the strand and the mould is impaired . It is necessary, therefore , to choose the appropriate type of mould powder .In the industrial experiments, it is very difficult and expensive to study this sensitivity by introducing controlled variation in one parameter while keeping all the other constant. Numerical and computer simulation methods are used in the study .They can predict the liquid slag thickness developed above the liquid steel and distribution of the temperature. The sensitivity of the liquid slag thickness to variations can be determined in the material properties of the mould powders.  相似文献   

A Medical Image Quantization Method Suited for PACS     

LI Qing hui  PENG Cheng lin  HOU Wen sheng  LUO Xiao gang 《保鲜与加工》2002,(3):78

Image compression is very important in picture archiving and communication system(PACS). The author studied the statistical distribution of image wavelet subimage coefficients and concluded that the distribution of wavelet subimage coefficients is similar to that of Laplasian distribution. On the other hand, in image reconstruction, the coefficient with different amplitude owns different weight, and different accuracy can be applied to different coefficients according to their different weight. Then, the author has designed a image quantization encoding scheme for PACS. In this scheme, they selected the sample-standard-deviation of coefficients in every subimage as the quantization threshold, and accurately encoded those coefficients with higher weight. Also, this algorithm utilized the visual character of human. The test has proved that the main advantages of this method are the simplicity in computing and predictable encoded coefficients, and a high compression efficiency can obtain too.  相似文献   

外源激素和微量元素对茶籽萌发和生理生化变化影响的研究   总被引：5，自引：2，他引：5  

陶汉之  陶迁 《作物学报》1995,21(4):442-450

茶树种子经赤霉素（ＧＡ）、乙烯利（ＣＥＰＡ）硼酸（Ｂ）、钼酸铵（Ｍｏ）、硫酸锰（Ｍｎ）和硫酸铜（Ｃｕ）溶液处理后，子叶吸水能力、持水力、呼吸速率和过氧化氢酶活性增强，可溶性糖和蔗糖含量提高，并加速子叶蛋白质的消耗和胚对蛋白质的利用，从而促进茶籽萌发生长，增加幼苗干重，提高发芽率，其中以ＧＡ１００ｐｐｍ、ＣＥＰＡ１００ｐｐｍ、Ｂ１５００ｐｐｍ，Ｍｏ１０００ｐｐｍ，Ｍｎ１０００ｐｐｍ，Ｃｕ１００ｐｐｍ  相似文献   

锌元素对籼稻成熟胚愈伤组织绿苗分化率的影响   总被引：1，自引：0，他引：1  

赵成章 《作物学报》2001,27(3):404-408

本实验就锌元素对籼稻成熟胚愈伤组织绿苗分化率的影响进行了研究，结果指出：(1)锌元素能明显提高籼稻成熟胚愈伤组织绿苗分化频率，且使用浓度范围较广(0.5～10μmol/L)，其中以锌浓度1μmol/L效果较好；(2)在本实验范围内各籼稻品种对锌元素的反应是一致的，但品种间差异很大，其中中早14绿苗分化率较高；(3)锌脉冲试验指  相似文献