大连地区寒潮强风天气的数值模拟研究

利用常规资料、自动站资料以及中尺度数值模式（MM5V3）对2007年3月4～5日大连地区出现的极端寒潮大风天气进行了分析。结果表明,这次极端寒潮大风天气是北方冷空气东南移形成强冷锋与北上强江淮气旋共同作用造成的。强冷空气在下沉气流作用下,在大连上游即渤海中低层形成强干冷中心,低空有强负涡度、强辐散,高空有强正涡度、强辐合,有利于地面冷高压及冷锋的加强;大连东部低空有强正涡度、强辐合,高空有强负涡度、强辐散,有利于气旋加强发展;强高压、强冷锋配合罕见的强大气旋,从地面到850hPa形成明显的西边强高压、东边特强气旋的形势,这是出现寒潮强风天气非常有利的因素,这种西高东低形势形成的强气压梯度区自西向东经过大连地区,造成大连地区罕见的寒潮强风天气。     

2008年初江西省大范围地区持续冻雨天气分析

利用气象常规资料对江西省2008年1月25~29日和2月1~2日出现的2次持续强冻雨天气过程进行对比分析,找出持续强冻雨发生的天气形势特点和大气垂直结构特征,总结出冻雨天气预报的着眼点,为冻雨天气预报提供参考。     

内生菌拟茎点霉B3促进大田水稻增产的初步研究（英文）

After insufflating extended endophytes phomopsis B3 ferment diluent on seedling bed of rice,the effect of microbial inoculum on rice growth was studied.The investigation result of seedlings before transplanting seedling showed that leaf age,the number of green leaves,the number of tiller of individual plant and the weight of per 100 fresh plants in microbial inoculum treatment group increased 0.11,0.12,0.03 and 2.6 g respectively compared with those of control group.20 days after transplanting,increased tiller number in microbial inoculum treatment group was 55 500 hm2 more than that in control group.30 days after transplanting,tiller number in microbial inoculum treatment group was 42 000 hm2 more than that in control group.In harvest season,the yield,weight of 1 000 grain and seed-setting rate increased 300 kg/hm2,0.7 g and 0.23% respectively compared with these in control group.The result of preliminary study demonstrated that microbial inoculum confected by endophytes phomopsis B3 could increase the number of strong seedling and yield.     

面包面条兼用型强筋小麦主要品质性状分析与评价

为明确面包面条兼用型强筋小麦主要品质水平,对32份集聚Ax2^*/Bx7+By8或By9/Dx5+Dy10亚基和 wx-B1b基因的春小麦品种(系)进行面粉品质相关指标分析。结果表明,供试品种(系)面筋指数平均为94.4%,能量平均为122 cm²,延伸性平均为146 mm,最大拉伸阻力平均为654 EU;糊化温度平均为63.7℃,峰值粘度平均为1 125 BU,峰值温度平均为87.4℃,各品质指标表现优良。对近年审定的4个品种进行面制品评分发现,面包评分平均为84.3,面条评分平均为86.2,饺子皮评分平均为84.3,均属于优质面包面条兼用型品种。对品质指标进行相关性分析发现,面筋指数、拉伸参数等与淀粉糊化特性相关不显著,面筋质量与淀粉特性可实现同步改良。Ax2^*/Bx7+By8或By9/Dx5+Dy10/ wx-B1b可作为兼用型强筋小麦优质基因集聚类型之一,在品质改良中加以利用。本研究中,龙19-9859、龙19-9876、龙19-9878、龙18H2305、龙蒙麦9030、龙麦77、龙麦86及龙麦94为优异面包面条...     

施氮量对强筋小麦物质积累与籽粒产量的影响

为探究冀东地区强筋小麦适宜施氮量,选用2个强筋小麦品种津农7号(氮高效型)和中麦998(氮低效型)为试验材料,设置0 kg·hm^-2(N₀)、180 kg·hm^-2(N₁)、210 kg·hm^-2(N₂)和240 kg·hm^-2(N₃)4个施氮量处理,研究施氮量对强筋小麦籽粒产量和干物质与氮素积累转运的影响。结果表明,在N₀～N₂处理范围内,2个强筋小麦品种的籽粒产量、花前干物质转运量和氮素转运量随施肥量增加均显著增加,N₃处理下2品种的籽粒产量和花前氮素转运量较N₂处理无显著变化,说明适量施氮可促进强筋小麦氮素转运与籽粒产量的提高。增加施氮量可促进花前干物质向籽粒的转运,津农7号的干物质转运率高于中麦998,2个品种的花后干物质对籽粒的贡献率为60.59%～77.16%,说明小麦籽粒产量主要来源于花后干物质积累。2个品种开花...     

百合组培苗移栽前的壮苗技术研究

分析了影响百合组培苗移栽成活率的主要因素,得出以下结论:百合组培苗移栽时应选择组培苗叶色浓绿、根系健壮的植株进行移栽,移栽前练苗2~3d,使新叶逐渐形成蜡质,促进新根发生,以适应环境的变化;4份蛭石×1份腐熟羊板粪的栽培基质适宜百合移栽后的生长。移栽后的水肥管理及生长温度的控制也是影响组培苗成活的关键因素。     

香艳茄大棚栽培技术

对引进的香艳茄进行大棚栽植,本文从培育壮苗、扦插繁殖、苗床管理、整地定植,田间管理、整枝、搭架、绑蔓、肥水管理、疏果、采收、分级和包装等环节进行了阐述,旨在提高经济性状和产量,增加农民收入。     

wx基因缺失遗传效应在强筋小麦育种中的利用

wx基因缺失效应是小麦淀粉特性改良的遗传基础,可用于强筋小麦淀粉特性改良.本文对wx基因缺失效应在强筋小麦品质改良中的利用进行了探讨,为面包面条兼用型强筋小麦育种提供理论依据.     

大连市气象局网强网管系统的综合应用

介绍了大连市气象局网络现状及需求,重点分析了如何利用网强网管软件的优势实现大连气象网络管理功能,并分别指出了网强网管系统分别在各个子功能上的功能要点,突出体现了大连气象网络网管重点在于智能采集、智能分析和智能报警。     

Experimental determination of net protein charge and A(tot) and K(a) of nonvolatile buffers in canine plasma

Acid-base abnormalities frequently are present in sick dogs. The mechanism for an acid-base disturbance can be determined with the simplified strong ion approach, which requires accurate values for the total concentration of plasma nonvolatile buffers (A(tot)) and the effective dissociation constant for plasma weak acids (K(a)). The aims of this study were to experimentally determine A(tot) and K(a) values for canine plasma. Plasma was harvested from 10 healthy dogs; the concentrations of quantitatively important strong ions (Na+, K+, Ca2+, Mg2+, Cl-, L-lactate) and nonvolatile buffer ions (total protein, albumin, phosphate) were determined; and the plasma was tonometered with CO2 at 37 degrees C. Strong ion difference (SID) was calculated from the measured strong ion concentrations, and nonlinear regression was used to estimate values for A(tot) and K(a), which were validated with data from an in vitro and in vivo study. Mean (+/- SD) values for canine plasma were A(tot) = (17.4 +/- 8.6) mM (equivalent to 0.273 mmol/g of total protein or 0.469 mmol/g of albumin); K(a) = (0.17 +/- 0.11) x 10(-7); pK(a) = 7.77. The calculated SID for normal canine plasma (pH = 7.40; P(CO2) = 37 mm Hg; [total protein] = 64 g/L) was 27 mEq/L. The net protein charge for normal canine plasma was 0.25 mEq/g of total protein or 0.42 mEq/g of albumin. Application of the experimentally determined values for A(tot), K(a), and net protein charge should improve understanding of the mechanism for complex acid-base disturbances in dogs.