Salinity stress responses of a sterile mutant of Ulva pertusa (Ulvales, Chlorophyta)     

Makoto  KAKINUMA  Yoshinao  KUNO  Hideomi  AMANO 《Fisheries Science》2004,70(6):1177-1179

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保护地甜椒新品种海丰26号选育初报   总被引：4，自引：0，他引：4  

邢永萍张树根  张军民蒋钟仁 李春玲 《辣椒杂志》2003,(3):22-23

引进国外优良的甜椒杂交种，进行花药培养，获得大量花培当代单株。再选留优良花培品系，配制杂交组合，并选择优良的杂交组合进行品比试验和区域试验。并在各地的保护地内进行试种。  相似文献   

Non-destructive determination of fat content in frozen and thawed mackerel by near infrared spectroscopy     

Junji  SHIMAMOTO  Kaoru  HASEGAWA  Minoru  SATO  Sumio  KAWANO 《Fisheries Science》2004,70(2):345-347

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关于我国设立刑事证据开示制度的思考     

刘晓燕 《安徽农业大学学报》2004,(1):90-92

1996年《刑事诉讼法》的修改，产生了律师阅卷难问题。为解决这一问题，真正实现控辩双方公平对抗，我国应设立刑事证据开示制度。文章对刑事证据开示制度的内涵、设立的必要性、设立的原则以及具体建议进行法律思考。  相似文献   

Correlated Responses in Two Traits when Selection is Practised on their Ratio     

M. Hühn 《Plant Breeding》1992,109(1):28-34

In many fields of application in plant breeding and crop science, ratios of two component traits X and Y are of interest (harvest index in cereals, leaf-to-stem ratio in forage legumes, height-to-diameter ratio in forest trees etc.). When selection is practised on the ratio X/Y of two traits X and Y, the experimenter may be interested in the resulting changes of both trait means. Based on improved approximations for the covariances between X and X/Y and between Y and X/Y and for the variance of X/Y the changes in the means of X and Y can be predicted by applying the regression approach from conventional selection theory. Explicit expressions for these correlated responses in X and Y when selection is practised on their ratio X/Y are derived and discussed. The different outcomes (decrease, zero change or increase) for the selection pressures on X and Y are characterized by phenotypic coefficients of variation of X and Y, phenotypic and genotypic correlations between X and Y and heritabilities of X and Y.  相似文献   

Quantitative site classification in the key county in the conversion of farmland to forests project     

Shidong Li  Guofang Shen  Mingpu Zhai  Junqing Li 《Frontiers of Forestry in China》2006,1(2):157-162

According to the requirements of the conversion of farmland to forests project (CFFP), we investigated the vegetation factors and environmental factors from more than 6,105 sub-compartments in Liangcheng County, Inner Mongolia by using the Matlab, analytic hierarchy process (AHP), and the hierarchical cluster method (HCM). The site conditions were classified quantitatively. The results show that CFFP at this site comprises five site-type groups and 19 site types. A quantitative site classification system method has been established in this paper. __________ Translated from Journal of Beijing Forestry University, 2005, 27(6) [译自: 北京林业大学学报, 2005, 27(6)]  相似文献   

关中驴对6株动物病毒抗原的免疫应答试验     

李六金  朱德生  贾满民  陈慧茹  吴耀南  赵永康  押宗保 《动物医学进展》2003,24(3):104-108

以关中驴为试验动物 ,用猪瘟病毒(HCV )、犬细小病毒 (CPV )、兔瘟病毒(RHDV)、鸡新城疫病毒 (NDV)、伪狂犬病毒(PRV)等病毒进行免疫 ,检测所产生的抗体效价 ,并与猪、鸡、兔、犬、及猫等动物进行比较。试验结果表明 ,关中驴与对照动物产生的抗体效价一致 ,证明了关中驴可替代其它动物用于生物制品研究  相似文献   

贵州省退耕还林与农村经济发展研究     

赵华 《林业调查规划》2004,29(1):57-60

通过对贵州省贞丰、桐梓、锦屏等若干县市林业生态建设监理、检查、造林实绩核查等工作的实践和研究，认为退耕还林工程与农村经济发展相结合，目前应加强以下工作：选择林业主导产业；林产业时间、空间的合理布局；树种、林种的结构优化；林业体制创新；实施相关配套工程。  相似文献   

浙江淳安新安江开发公司封山育林效益研究   总被引：2，自引：0，他引：2  

汪祖辉  郭仁鉴  叶钟节  方炳法  童修耀 《浙江林学院学报》1989,(2)

浙江省淳安县新安江开发公司所属16个国营林场22475.53hm~3荒山迹地,封山育林30年,现有天然次生林总蓄积量135万m~3,年总生长率8.07％,活立木直接经济价值2.25亿元。到1987年止公司已获中间利用净收入2135万元。近20年累计天然次生林比无林地多涵蓄水10亿m~3,每年进入水库的泥沙量减少80％,对调节水库水源、延长发电年限、纯洁水质都起到良好作用。公司长期实施的5项管护技术,把封山育林提高到科学经营水平,在千岛湖区成功地建立了森林生态屏障。  相似文献   

橡胶树低温伤害的生理反应   总被引：4，自引：1，他引：3  

林梅馨  杨汉金 《热带作物学报》1994,15(2):7-11

在人工零上低温下,巴西橡胶树(Hevea brasiliensis)叶质膜透性随低温处理时间的延长而持续上升,抗冷品系的上升速率比不抗冷品系慢。呼吸强度和ATP含量均随处理时间的延长而持续下降,抗冷品系下降速率比不抗冷品系慢。叶绿体Mg~(++)—ATPase活性也表现出明显抗性差异。可见,低温下叶组织的质膜透性、呼吸强度、ATP含量以及Mg~(++)—ATPase活性的变化与品系抗冷性有关。低温下呼吸强度、ATP含量与质膜透性变化呈负相关,质膜透性的变化与供能有关。  相似文献