不同有机肥料对暖季型草坪冬季质量的影响   总被引：3，自引：0，他引：3  

欧阳底梅  丁少江  谢良生  谢佐桂 《草业科学》2003,20(5):46-49

在暖季型草种马尼拉草和假俭草上铺施不同厚度的东北泥炭土、花生麸、蘑菇肥、木渣肥、木糠肥、河沙、硫酸钾复合肥及空白对照进行对比研究。在试验设计范围内，花生麸对草坪冬季质量效果最佳，作用时间也最持久；泥炭土在短期内使用效果好，但随时间延长肥力明显降低；蘑菇肥从肥力与作用时间来看均比较适中；木糠肥明显优于木渣肥，但二者肥力较低；河沙仅在较短的时间内起作用；硫酸钾复合肥作为化合肥与有机肥相比较，作用时间短，安全性较差。  相似文献   

不同输精时间对江淮水牛受胎率的影响     

柳培春王立克  马传功李庆江 邱夏兰 《安徽农业技术师范学院学报》2008,22(1):13-15

本文主要对母牛不同发情阶段的输精时间和输精时卵泡发育程度进行了分析，并研究了不同输精时间对江淮水牛受胎率的影响。结果表明，江淮水母牛在发情结束后6-10h，或在在卵泡表皮紧张、波动明显时进行输精，情期受胎率最高。  相似文献   

汉语外来词翻译方法之变迁     

胡铁江 《湖南农机》2008,(5)

外来词是一种重要的社会语言现象,也是一种语言不可或缺的组成部分.外来词能否在的语中稳定下来,引入时的翻译方法显得非常重要.本文梳理了中国翻译史上不同时期汉语外来词的翻译方法,旨在对今天外来词的翻译有所裨益.  相似文献   

Double-Face Dynamic Balance Method of Spot Rotator without Removing the Test Weights     

XIE Zhi jiang  TANG Yi ke  LI Yuan you 《保鲜与加工》2002,(9):101-103

Site dynamic balance is a important element in installation and maintenance of heavy rotary mechanism. It's hard to discharge testing weights, and the remanent weights will effect the result of balance test. The paper presents a kind of dynamic balance algorithm which need not to discharge the test weights, basing on influence coefficient. The principle of the algorithm is to balance the sum of original unbalance weights and testing weights by the result balance weights. In the algorithm , the influence coefficient of last time can be used optionally for the same rotor. Then developing a dynamic balance system building on it. The site experimental results indicates that this algorithm has a high balance precision, predigests the steps and reduces the operation time.  相似文献   

Control and Improvement and the Grey Clustering Evaluation for Acoustic Environmental Quality of Residential Area     

HU Ying - feng  HUA Hong  CHEN Fu - jiang 《保鲜与加工》2006,(1):96-100

In this paper, the influencing factors of acoustic environmental quality of residential area including noise from transportation, industry, construction and society were analyzed, the comprehensive influence of acoustic environmental quality of residential area between indoor and outdoor ones was studied, the evaluation index system of acoustic environmental quality of residential area based on influencing elements of acoustic environmental quality of indoor and outdoor ones was established, the control standard and improvement strategies including planning, technology and management of acoustic environmental quality of residential area were put forward, the gray clustering evaluation model of acoustic environmental quality of residential area was set up, and a case was evaluated.  相似文献   

Research on Behavior of Elasto - Plastic Stability of Schwedler Domes          下载免费PDF全文

LU Cheng - jiang 《保鲜与加工》2007,(1):52-55

More than 400 tests for the complete-process analysis considering geometry nonlinearity and material nonlinearity of Schwedler single-layer latticed domes with various geometries have been carried out and the critical load is obtained.The effect of initial imperfection,asymmetric load distribution,especially the effect of material nonlinearity on the stability behavior of this kind of domes is considered,and the rule about the elasto-plastic stability behavior is concluded.Based on the work introduced in present paper,people can get useful information for engineering design or theoretical study.And some conclusions could be drawn:(1)To ensure security of the dome,the critical load of the dome must be confirmed by the complete-process analysis considering geometry nonlinearity and material nonlinearity;(2) Schwedler single-layer latticed domes belongs to structure of imperfection sensitivity;(3) The critical load of the dome is affected a little by the asymmetric load distribution;(4)The effect of change of supporting condition on the critical load of the dome should be considered properly in engineering design.  相似文献   

中国草业生态经济区初探   总被引：33，自引：9，他引：24  

任继周  胡自治  张自和  侯扶江  陈全功 《草业学报》1999,(Z1)

根据生态条件的相似性 (尤其是水、热条件的相似性 )、草地类型和景观的相似性、草业系统生产层的结构和生产内涵的趋同性、草地生态系统与经济系统的内涵与外延的相似性、草业发展对策和关键技术的相似性和草业生产区域规划的组织与实施的空间可操作性 (即一定级别上行政区划界限的完整性 )等 6项原则 ,我国可划分为 7个草业生态经济区 :蒙宁干旱草原草业生态经济区、西北荒漠灌丛草业生态经济区、青藏高寒草业生态经济区、东北森林草业生态经济区、黄土高原—黄淮海灌丛草业生态经济区、西南岩溶山地灌丛草业生态经济区和东南常绿阔叶林—丘陵灌丛草业生态经济区。以自然条件和草业生产现状为基础 ,分区提出草业发展对策  相似文献   

东亚近海大陆绵羊群体遗传分化研究   总被引：3，自引：4，他引：3  

鲁生霞  常洪  杜垒  角田健司  孙伟  杨章平  常国斌  王慧影  徐伟  毛永江  王庆华  许明 《畜牧兽医学报》2004,35(2):129-133

采用中心产区典型群随机抽样方法在山东省济宁市抽取小尾寒羊60只，应用电泳技术检测了11个编码血液蛋白的结构基因座，引用东亚近海大陆的4个绵羊群体的相关资料进行遗传分析。研究表明：(1)5个群体哈拉和林绵羊、乌兰巴托绵羊、小尾寒羊、湖羊、占部落绵羊的基因平均杂合度分别为0．3742、0．3565、0．3184、0．3620和0．2473；(2)前人关于小尾寒羊和湖羊都是由蒙古羊分化而来的考证得到遗传学实验的进一步证明；(3)越南占部落绵羊与山东小尾寒羊关系最近；(4)小尾寒羊、湖羊和占部落绵羊受蒙古羊血统的影响递减。  相似文献   

求解地下水污染源及传导参数的线性回归法     

周新国  温季  聂宪江  郭冬冬 《灌溉排水学报》1999,(4)

应用线性回归法 ,对在一维均匀流场 ,平面二维弥散 ,瞬时投源情况下的弥散试验资料进行适当变换后 ,可得回归直线方程 ,应用回归直线的斜率和纵截距分别求出污染源 (x0 ,y0 ,t0 )、传导系数 (DT,DL)、含水层流速 (U)及瞬时投入单位含水层厚度上的示踪剂的质量 (M)。  相似文献   

民国时期农村改进的实践与经验教训——走马乡农村实验研究     

万振凡  李江 《农业考古》2005,(6):21-25

走马乡实验区采取“经济为中心,文化为手段,政治为枢纽“的实验方法,以农民的自治、自卫、自给、自强为目的,从管、教、养、卫四个方面开展农村实验工作,在农村社会改造方面为我们留下了宝贵的经验教训.  相似文献