密度及氮磷钾施肥量对夏大豆邯豆5号产量影响

以高产优质夏大豆邯豆5号为材料,采用四元二次回归正交旋转组合设计,研究种植密度和氮、磷、钾施肥量对邯豆5号产量的影响,建立了产量与种植密度和肥料之间的数学模型.结果表明,对邯豆5号产量的影响施磷量(X3)>施氮量(X2)>施钾量(X4)>种植密度(X1);邯豆5号理论产量的最大值为4 399.5 kg/hm2,相应的栽培措施是密度22.5万株/hm2,N 120 kg/hm2,P2O5 180 kg/hm2,K2O75 kg/hm2.     

玉米新品种西试1号在安宁河流域的适宜密度和施肥技术研究

[目的]为四川安宁河流域玉米新品种提供配套栽培技术措施.[方法]以玉米新品种西试1号为材料,采用4因素5水平二次回归正交旋转组合设计,研究密度、氮肥、磷肥、钾肥对西试1号产量的作用效应,建立回归模型并分析各因素的作用规律.[结果]磷肥对玉米产量影响最大;N与P、N与密度、K与密度及P与K之间存在着显著的互作效应.[结论]产量≥9 450 kg/hm2的优化栽培措施为:施氮量481.8～937.5 kg/hm2,施磷量551.1～897.9 kg/hm2,施钾量128.4～214.8 kg/hm2,栽培密度54 855～63 945株/hm2.     

不同密度和肥力条件对丰两优香一号产量及经济性状的影响

[目的]为优质超级杂交稻丰两优香一号的高产栽培技术体系的集成提供技术支撑.[方法]在大田试验条件下,比较不同种植密度与施氮量条件下丰两优香一号的产量及经济性状.[结果]在低密度条件下,增施氮肥有利于丰两优香一号产量的提高;而在高密度条件下增施氮肥反而会导致产量下降.在株行距19.0 cm×20.0 cm、谷秧2粒/穴、施氮肥180 kg/hm2条件下,产量较高.[结论]不同密度和肥力条件对丰两优香一号产量及经济性状都有显著影响.在浙江衢州中等肥力田种植,以种植密度26.25万穴/hm2左右,每穴2拉谷秧, 施纯氮180 kg/hm2左右为佳.     

小麦新品种三峡麦8号优化栽培措施研究及模型建立

[目的]为制定三峡麦8号高产栽培技术规程提供科学依据,[方法]以小麦新品种三峡麦8号为试材,采用5因素2次回归正交旋转组合设计,研究播期、施氮量、施磷量、施钾量和基本苗数5项栽培措施与产量的关系,通过模拟寻优找出综合栽培措施决策方案.[结果]建立了重庆市万州区三峡麦8号综合栽培措施的产量数学模型.复相关系数为0.9258,达极显著水平;5项栽培措施中播期和施氮量对小麦产量影响显著,施磷量、施钾量和基本苗对小麦产量影响不显著.[结论]三峡麦8号产量在4 282.05 kg/hm2以上的优化栽培措施为:11月3～6日播种,基本苗207.36万～212.64万株/hm2,施纯氮量55.38～190.38 kg/hm2,施磷量71.70～78.30 kg/hm2,施钾量57.36～62.64 kg/hm2.     

不同种植方式对坡地大豆产量的影响

[目的]探讨坡地大豆的3种种植方式的增产效果,为坡地种植大豆高产提供理论依据.[方法]共设3个处理,采用随机区组设计,2次重复.[结果]行距40 cm、株距20 cm双株种植较传统的行距40 cm、株距10 cm单株种植增产显著,每667 m<'2>比传统单株种植的大豆增产77.6 kg.而株距20 cm双株种植与株距30 cm 3株种植、株距30 cm 3株种植与传统株距10 cm单株种植之间差异不显著.[讨论]综合考虑,在承德地区大豆最好采用行距40 cm、株距20 cm双株种植方式.     

花生新品种黔花生二号丰产栽培技术数学模型研究

[目的]探索黔花生二号的丰产栽培技术模式.[方法]采用二次通用旋转回归组合设计研究黔花生二号产量与主要栽培措施(密度、氮、磷、钾)间的数量关系,并建立各因素与产量指标间的数量模型.[结果]黔花生二号获得高于4 305.3 kg/hm2的丰产栽培技术措施是:播种密度为28.29×104～28.69×104株/hm2;尿素施用量为136.875～163.125 kg/hm2;过磷酸钙施用量为423.750～476.250kg/hm2;硫酸钾施用量为136.875～163.125 kg/hm2,其中N:P2O2:K2O=1:2.08:2.17.[结论]影响黔花生二号产量的主要因子是密度和钾肥,其次是磷肥和氮肥.     

不同播期和密度处理对超短季棉个体形态发育的影响

[目的]探讨不同播期和密度处理对超短季棉品种个体发育动态的影响,明晰它们对棉花营养生长和生殖生长的效应,为黄河流域冀东棉区棉花种植的播期和密度管理提供理论和实践指导.[方法]以超短季抗虫棉546系为材料,探讨了不同播期(播期1:5月20日,播期Ⅱ:6月2日,播期Ⅲ:6月14日)和密度(低密度:12万株/hm2,中密度:15万株/hm2,高密度:18万株/hm2)处理对其个体生长发育动态的影响.[结果]不同的播期和密度处理对超短季棉546系的个体生长发育具有明显的影响,其中播期的影响效力要高于密度的影响效力,而播期对于棉株个体果枝数量发育的影响效力又明显高于对主茎伸长生长和加粗生长的影响效力.[结论]在黄河流域的冀中棉区对超短季棉546系栽培过程中,可以通过播期和密度的调控,有效地促进其营养生长和生殖生长,夯实其产量基础.     

不同种植密度对棉花产量性状的影响

[目的]确定北疆棉花的适宜种植密度.[方法]以新陆早33为供试棉花品种,研究不同种植密度(9.0、13.5、18.0、22.5、27.0、31.5万株/hm<'2>)对其产量性状的影响.[结果]棉花生育期随种植密度的增加而延后;种植密度与棉花株高、叶片数、果枝数、蕾数、铃数、铃重、衣分均呈显著负相关;棉花不同器官于物质积累均呈"S"型曲线,花铃期棉花干物质积累最快;密度为22.5万株/hm<'2>处理棉花的铃重、衣分、籽棉和皮棉产量最高.[结论]北疆早熟棉花品种的适宜种植密度为22.5万株/hm<'2>.     

栽培措施对半夏倒苗率和产量的影响

[目的]探索能够降低半夏倒苗率、提高半夏产量的栽培措施.[方法]用珍珠岩和土壤为基质,分别设9个处理栽培半夏,分析施肥措施对其倒苗率和产量的影响.[结果]以珍珠岩为基质的半夏产量极显著高于以土壤为基质的半夏;不同的施肥量对半夏的产量和倒苗率有极显著的影响.[结论]种植半夏以珍珠岩为基质, 基本营养液浓度为1/5MS, 施以浓度为100 mg/L的KH2PO4效果最佳.     

2种穗型强筋小麦对几个播种基础因素的需求差异性研究

[目的]寻求4种播种基础因素适合2种穗型强筋小麦的最佳指标,比较2种小麦对这些因素的需求差异.[方法]大穗型强筋小麦以淄麦12号,小穗型强筋小麦以济南17号为试材,对其分别进行地力适应性、基本苗差异、播种期和适宜种植行距试验,并比较2种穗型强筋小麦对4种播种基础因素的需求差异.[结果] 小穗型强筋小麦对土壤肥力的要求低于大穗型强筋小麦;大穗型强筋小麦的基本苗以225万～270万株/hm2为宜,小穗型强筋小麦的基本苗为135万～180万株/hm2,比大穗型小麦低80万株/hm2左右;2种穗型强筋小麦的播种期一般相差5 d左右,平均播种行距相差5 cm左右.[结论]与小穗型强筋小麦相比,大穗型强筋小麦对地力条件要求高,适宜基本苗大,播种期晚,平均行距小.     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

Concept of freedom of infection of animal flocks

Totally negative results of epidemiological investigation of random samples do not prove the absence of the infection as the pathogen may be restricted to only a few animals in the herd for a long time. The statement "absence of infection" is critical for such situations. The question is raised, whether the statement "absence of infection" should be generally avoided. Classification of herds and flocks according to the prevalence of the pathogen would be more valid for the implementation of control measures.     

显微维氏硬度测量不确定度评定

对显微维氏硬度测量不确定度进行评定，建立了不确定度计算的数学模型，确定了影响实验结果的各项因素，计算出了各因素的标准不确定度，得出结果的扩展不确定度，并给出最终测量结果的表达式。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.