Analysis on Mineral Element Contents in Associated with Varietal Type in Core Collection of Yunnan Rice

Eight-element contents of 653 unpolished rice samples harvested from Xingping experiment farm, Yunnan Province under the same ecological conditions were analyzed by ICP-AES method. The mineral elements content were closely related to low diversity, high-yielding, and multi-resistance breeding; The K, Mg, Ca and Mn content in high-yielding and resistant varieties were high, and other nutrients such as P, Fe, Zn and Cu were low, which was connected with the heredity and physiological mechanism of mineral nutrients. There is zonal distribution of mineral elements content from Yunnan rice, especially for P, Fe, Zn and Cu co-related with the diversity center, paddy versus upland, glutinous and non-glutinous, glume-hair versus nuda, rice color, rice flavor, soft rice versus non-soft rice, but it did not find any association with indica-japonica types. The results supported the ecological variety group view of 5-grade taxonomic system “species-subspecies-ecological groups-ecological variety groups - varietal types“ .     

四川乐山地区紫茎泽兰的入侵定殖和风险评估

本文报道了四川省乐山地区犍为县塘坝乡境内入侵新物种一紫茎泽兰的分布、发生和定殖入侵情况。结合紫茎泽兰的生物学特性和当地的地理气候特征，对紫茎泽兰入侵乐山及其近邻地区的风险进行评估。     

国际原油选择方向我国油脂市场应积极防范风险

3月份迄今．国际石油价格的波段走势可谓“一枝独秀”．相较之下，CBOT大豆衍生品市场却呈现箱体振荡的走势．而国内油脂市场则延续基本面为主导的弱势寻底格局．市场再次验证了预测机构前期作出的油脂行情预测。本文立足于引发近期外围能源市场强势振荡加剧的关键性因素．结合中期我国油、籽市场的供需基本趋势，包括政策面调控导向的新动态．提示和分析下一阶段我国油脂市场可能存在的逆市波动风险。     

鸡白血病病毒抗原ELISA试剂盒的研制和应用

以双抗体夹心酶联免疫吸附试验（ＤＡＳ－ＥＬＩＳＡ）为基本原理，成功地研制出鸡白血病病毒抗原ＥＬＩＳＡ试剂盒，该试剂盒与国外同类试剂盒相比，具备相同的特异性和敏感性，对ＲＡＶ－１纯化样品的最小检出量可达０．７８ｕｇ／ｍｌ，且敏感性高于直接补体结合试验。经初步应用发现，我国商品种鸡群ＡＬＶ阳性率为０．７－１４％，在部分ＳＰＦ鸡群中未检出阳性鸡。     

Assessment of Negative Training on the Use of Cubicle Beds by Heifers

40 in-calf heifers were observed to examine the effect of timbers placing in passage area on their use of cubicle beds. Prior to the experiment preliminary observation was taken on these 40 heifers and they were divided into two even groups (cubicle user(or control) group versus cubicle refusal (or experimental) group by whether they properly used the cubicle beds or not. The timbers were placed in passage and feeding areas for the cubicle refusal group to force the animls to lie in the cubicle beds. The results of this experiment showed that feeding behaviour was unaffected by the presence of the timbers, but lying acitvity was about 8% higher for the experimental group, which led to a mean of almost 2 hours longer lying time over 24 h. After the timbers were removed, there was a significant decline in lying by the experimental group. The diurnal pattern of lying behaviour in cubicles indicated that the major effect on lying activity exerted by the presence of the timbers was seen during midnight to 10:00 a     

深基坑锻锤基础冬期施工

在冬期施工，对于土方开挖、钢筋绑扎、人员的通行、砼的浇铸、砼的温度控制，基坑的保温等都带来一定困难，为此提出了深基坑锻锤基础才是最佳实践应用。     

遗传同型交配下母子间基因型联合分布的信息熵性质

定义了遗传同型交配下一对等位基因群体的基因库信息熵和基因型信息熵，给出并讨论了世代交替中母子间基因型联合分布及其信息熵性质。并从信息角度加以解释；最后，应用Matlab软件进行数据模拟，验证了所得结论的正确性。     

鸡新城疫病毒B_(95)株的RT-PCR检测方法研究

本试验设计了一对B95 株的特异引物NDV -P1/P2,探讨了对其进行RT-PCR检测的可行性。结果证明 ,用该引物可以扩增出一条310bp的特异核酸带 ,敏感性为0.0043ng/ul。     

金丝雀痘诊断与痘病毒致弱试验

本试验对送检的金丝雀经实验室诊断，确认为金丝雀痘，对分离的痘病毒进行动物致病性试验、病毒分离传代和致试验、致弱毒保护力试验和返强试验。结果表明：金丝雀痘病毒经鸡胚盲传３后能适鸡胚并致死金丝雀，８代后无致病性，１３例毒性快速通过本动物３次无返强现象，金丝雀用第１３代毒刺种３０天能抵抗强毒攻击。     

黑杨无性系日CO2固定总量的测定及与苗木生产潜势的相关性研究

通过对不同基因型黑杨无性系植株净光合速率日变化曲线与光合主体叶面积在时间和光强上进行累计积分来计算植株日CO2固定总量P。由于净光合速率日变化曲线不易准确测得，故以光响应曲线和光强的日变化来推测净光合速率日变化。对P值和生物量的相关性研究表明，二者的相关性很高。且认为可以用计算出的P值作为评估苗木生产潜势的指标之一，这为育种中生产力的早期选择提供了有力的证据。