Degradation of AM Nitrification Inhibitor in Soil of Subtropical Region

The aim of the study was to evaluate the degradation and persistence of 2-amino 4-chloro 6-methyl pyrimidine (AM), nitrification inhibitor at 1 and 2 µg g^?1 application rates in soil. The extraction of AM was done by QuEChER’s (Quick, Easy. Cheap. Rugged and Safe) method and the quantitative analysis by high-performance liquid chromatography (HPLC). AM decreased with time at both the levels of application with the decline being faster in the beginning up to 7 d. Dissipation of AM occurred in a single phase with the persistence data fitting well to the first-order kinetics. Half-lives of AM were determined to be 14.33 and 16.7 d at 1 and 2 µg g^–1 levels application rates. Since AM remains effective for an adequate period of time, it can be used for increasing efficiency of nitrogenous fertilizers in rice–wheat cropping systems as well as a safeguard for controlling environmental pollution in subtropical soils.     

油桃新品种中农金辉日光温室栽培技术

2009年春引进中农金辉油桃进行日光温室试栽,经过4 a的栽培观察,中农金辉油桃在山东莒县表现丰产性强、品质优、市场前景好、经济效益高,并总结出一套较为成熟的中农金辉油桃日光温室丰产栽培技术.     

浙江省淳安县竹产业现状与发展对策

文章分析了淳安县的竹资源现状、竹林发展及竹产业建设状况;总结了竹产业发展中存在的主要问题;提出了淳安发展竹产业所应采取的对策。     

靖西大麻鸭品系选育研究

目的分析300日龄的北京鸭Z9系、靖西大麻鸭和吉安红毛鸭3个地方鸭品种(系)体尺性状和屠宰性能的品种和性别差异以及两者的相关性,挖掘这3个地方鸭品种(系)的种质特性。方法将同一天出雏的北京鸭Z9系、靖西大麻鸭和吉安红毛鸭在相同饲养管理条件下饲养至300日龄后,各选择60只(公、母各半)进行屠宰测定。宰前进行个体的体尺测量,宰后进行屠宰性能测定。结果北京鸭Z9系的龙骨长和胫围极显著高于其他2个品种,靖西大麻鸭的体斜长显著高于其他2个品种,吉安红毛鸭无优势体尺性状;3个品种(系)的公鸭体尺性状优于母鸭;除体斜长和半潜水长外,北京鸭Z9系母鸭的体尺性状整体优于其他2个品种;北京鸭Z9系和靖西大麻鸭公鸭体尺性状整体优于吉安红毛公鸭。北京鸭Z9系的半净膛质量、全净膛质量、胸肌质量、腿肌质量、半净膛率、全净膛率和胸肌率均极显著高于其他2个品种,吉安红毛鸭的活体质量、屠体质量、半净膛质量、全净膛质量、胸肌质量、腿肌质量和胸肌率均极显著低于其他2个品种,靖西大麻鸭的屠宰性能处于3个品种(系)的中间水平;除屠宰率外,北京鸭Z9系和靖西大麻鸭公鸭的屠宰性能整体优于母鸭,且北京鸭Z9系母鸭的屠宰性能优于其他2个品种;吉安红毛鸭公鸭的屠宰性能指标整体最低。3个品种(系)的活体质量与大部分体尺性状都有不同程度的正相关;北京鸭Z9系的胫长和胫围,靖西大麻鸭的体斜长、龙骨长和半潜水长以及吉安红毛鸭的龙骨长、胫长和胫围与各自的屠宰性状有不同程度正相关;3个品种(系)的屠宰性状之间均呈极显著正相关。结论300日龄北京鸭Z9系的体尺性状和屠宰性能在3个品种(系)中均最佳,靖西大麻鸭处于中间水平,吉安红毛鸭体型最小,产肉量最少;3个品种(系)公鸭的体尺性状和屠宰性能整体上均优于母鸭;3个品种(系)体尺性状与屠宰性能之间具有不同程度的相关性,可以使用体尺性状来预估屠宰性能,加快品种的选育。     

高校图书馆网络信息资源利用状况调查

以大理学院为例,通过对大理学院图书馆学生读者网络信息资源利用状况进行调查和数据分析,得出了调查的基本结论,并对图书馆工作提出了相关建议。     

基于粗糙集理论的河南省农民收入预测研究

采用理论和实证分析相结合的方法,从自身、全国平均水平、中部相邻省份3个层次对比研究河南省农民收入变动情况。结合河南省的实际数据,运用粗糙集理论计算出各因素对河南省农民收入的影响系数,以及若干条确定性预测规则。最后对预测结果进行了分析。     

疏穗对‘赤霞珠’葡萄酒类黄酮物质含量的影响

为探讨疏穗对葡萄酒类黄酮物质含量的影响,以‘赤霞珠’为试验材料,在果实豌豆粒大小时期进行疏穗处理,葡萄藤负载量分别为22（CK）、16穗·株^-1（C1）和10穗·株^-1（C2）。采收成熟葡萄果实酿造干红葡萄酒,应用高效液相色谱-质谱联用（HPLC-MS）分析酒样中类黄酮物质的种类及含量。结果表明,疏穗提高了葡萄酒中单体花色苷和黄烷醇的含量,降低了黄酮醇的含量。主成分分析可以看出3种疏穗处理下‘赤霞珠’葡萄酒品质具有差异性。表明在山西乡宁地区,适度疏穗可以提高‘赤霞珠’葡萄酒中类黄酮物质的含量。其中葡萄藤负载量为10穗·株^-1时,葡萄酒中类黄酮含量最高。     

乔伊斯与伍尔夫小说女性形象的比较

詹姆斯·乔伊斯与弗吉尼亚·伍尔夫是二十世纪意识流文学大师的杰出代表,他们成功塑造了莫莉、拉姆齐夫人、达洛维等一系列经典女性形象。然而在表现和刻画女性形象时,二者的小说在语言运用、作家性别、女性意识和小说选材等方面存在诸多差异,其中两人各自不同的人生经历和生活态度对其创作产生了较大影响。两位作家透过小说中一个个鲜活的女性形象,表达了对整个女性群体命运的关怀。     

Near-shore distribution of Heaviside’s (Cephalorhynchus heavisidii) and dusky dolphins (Lagenorhynchus obscurus) at the southern limit of their range in South Africa

Photo-identification surveys over three years along 390 km of coastline north of Cape Town, revealed that Heaviside’s dolphin distribution was consistent between years and higher in areas more exposed to swells and with greater long-term availability of small hake Merluccius capensis (their principal prey). Dusky dolphin sighting rates varied considerably between years, but were generally higher in areas with lower hake availability and sandier shores (mostly straighter coastline). Large groups of 50–200 dusky dolphins were only seen in St Helena Bay, the site of a wind-driven upwelling zone. Heaviside’s dolphins were found in shallower, cooler water than dusky dolphins and were more likely to be seen during brighter phases of the moon (when nocturnal light conditions may influence the vertical migration patterns of prey) and in areas of high hake abundance. Near-shore fishing activity was higher in the northern half of the study area and clustered around harbours. Set netting occurred only at Yzerfontein and St Helena Bay, but due to changes in the industry is currently thought to be a low threat to the population. Interactions between Heaviside’s and dusky dolphins were usually neutral and sympatry appears to be mediated by differences in overall range and the type and size of prey species taken.     

金叶红瑞木物候期观察和乔木型嫁接技术研究

观测了金叶红瑞木Swida alba ‘Aurea’在石家庄的物候表现,叶色、枝条的颜色变化;以培育乔木型为目标,以3年生梾木S. macrophylla为砧木,对金叶红瑞木进行了春季枝接和夏季芽接嫁接试验。结果表明:金叶红瑞木开花时,枝条大多数花芽均可生出1~2个伞房状聚伞花序,树冠外围花序先开花,一般是枝条的顶端和向外伸展的侧枝开始开花。生长期叶片金黄色,休眠期枝条鲜红色。在春季3月25日切接成活率为8.22%,4月15日插皮接成活率为7.98%;夏季7月20日一级侧芽作芽穗嫁接成活率高达86.2%,而枝下芽作芽穗嫁接成活率达74.7%;采集带一级侧芽的接穗嫁接,嫁接芽萌发早,长势好;以嫁接为基础,首次提出灌木乔木化理念,成功培植乔木型金叶红瑞木,开发产品新类型。探明了金叶红瑞木在石家庄地区叶片和枝条颜色变化规律以及时间节点,为园林应用提供依据。