佳木斯地区肇东苜蓿田除草剂筛选试验研究

探讨研究佳木斯地区肇东苜蓿田除草剂筛选试验,筛选出对肇东苜蓿无药害除草剂品种和使用方法。通过土壤、茎叶处理除草剂小区试验,在肇东苜蓿分枝期对13处理除草剂苗情和草情观察记载。对肇东苜蓿无药害药剂处理有5%普施特、4%金豆、75%阔叶散和10%利收。肇东苜蓿无药害除草剂品种和使用方法推荐5%普施特水剂播后、苗前喷雾和苗后2~4叶期喷雾。     

氮、磷、钾肥配施对不同苜蓿品种鲜草产量的影响

采用“3414“二次回归最优设计试验方案, 研究N、P、K肥配施对紫花苜蓿(Medicago sativa)当年草产量的影响,结果表明:施尿素0.0 kg/hm2、过磷酸钙302.6 kg/hm2、硫酸钾440.0 kg/hm2,3种苜蓿均获得最高产量 ,其中阿尔冈金77167 kg/hm2,WL232HQ 77200 kg/hm2,敖汉苜蓿66166 kg/hm2.     

民勤沙区优良紫花苜蓿的适应性栽培研究

通过在民勤沙漠绿洲边缘进行紫花苜蓿的适应性栽培及品种对比试验研究,表明＂甘农3号＂、＂中苜1号＂、＂德宝＂、＂三得利＂、＂兰热莱恩德＂5个紫花苜蓿品种是适宜民勤荒漠绿洲栽培的优良紫花苜蓿品种,年可刈割3~4茬,年风干草产量分别为20775kg/hm2、18793kg/hm2、18300kg/hm2、20199kg/hm2、24875kg/hm2、24822kg/hm2;比我国优良地方苜蓿品种＂新疆大叶苜蓿＂分别提高16.62%、5.50%、13.39%、2.73%、39.64%、39.34%,表现出较强的适应性、抗逆性和较好的营养价值。     

苜草净防除肇东苜蓿田杂草药效比较试验研究

肇东苜蓿属豆科阔叶植物，禾本科杂草易于药剂防治，而阔叶杂草的药剂防治是东苜蓿生产的一个难题。主要影响肇东苜蓿产量的因素是杂草。目前对杂草的防治最有效的方法是采用化学药剂防治技术。5％苜草净是防治肇东苜蓿田杂草的较好药剂。     

90%除草灵清除玉米田杂草研究

2010年在五九七农场进行玉米大田试验,研究除草灵杂草防除效果.试验结果表明:90%除草灵2.0L/hm2除草效果最好;对喷施前出生的藜防效较好,对蓼也有一定的防效;施药后15天对新出稗草防效最佳;杀草谱与90%乙草胺2.5L/hm2+75%宝收22.5g/hm2处理相一致,防效上略低于90%乙草胺2.5L/hm2+75%宝收22.5g/hm2.     

黄土高原丘陵沟壑区(定西)抗病苜蓿品种比较试验

对3个主抗霜霉病的苜蓿新品系在黄土高原丘陵沟壑区—定西安定区进行了生物学性状及植物学性状的试验研究。结果表明,3个苜蓿新品系对定西地区的气候和土壤都具有较强的适应性,霜霉病的发病率为0,白粉病发病率仅为7.55%,分别比陇中苜蓿和阿尔刚金苜蓿低72%和84%。2号、3号和4号品系(第二年)的鲜草产量分别达56.73 t/hm2嫡6、3.8 t/hm2嫡和58.6 t/hm2嫡,3个品系的平均产草量较陇中苜蓿和阿尔冈金产草量分别提高30.5%(P<0.01)和17.5%(P<0.05)。抗病苜蓿将成为黄土高原丘陵沟壑区适宜推广种植的几个品种之一。     

越冬之星苜蓿除草剂品种和使用方法筛选试验研究

目的：探讨研究除草剂对越冬之星苜蓿耐药性的影响,可筛选出对越冬之星苜蓿无药害的除草剂品种和使用方法.方法：通过小区试验,在越冬之星苜蓿分枝期对各除草剂处理苗情和草情进行观察记载.结果：越冬之星苜蓿除草剂品种无药害和使用方法是越冬之星苜蓿播种后出苗前喷雾药剂处理;除草剂品种有75%阔叶散、5%金普施特、4%金豆和10%利...     

稻田恶性杂草除草剂37.5%苯·二甲水剂的研制

介绍了37.5%苯·二甲水剂有效成分的筛选、主要技术指标的确定和储存稳定性试验.经黑龙江、吉林两省田间药效试验结果表明防治扁杆蔗草、日本蔗草、蔗草、萤蔺和蒲草等顽固性宿根恶性杂草用量为3000～3 750 m/a;防治鸭舌草、慈菇、泽泻、谷精草和狼巴草等一般阔叶杂草用量为2 250 ml/ha,药效稳定在90%以上,对恶性杂草具有根治效果,对水稻安全,增产显著.     

稻田三棱草防除试验

为验证不同农药对稻田中三棱草的防除效果,采用吡嘧磺隆与10%草克星可湿性粉剂、30%唑草酮悬浮剂、10%苄嘧磺隆可湿性粉剂、72%2,4-D丁酯乳油混合施用,进行防除稻田三棱草实验.实验结果显示,吡嘧磺隆+2,4-D丁酯、吡嘧磺隆+挫草酮和苄嘧磺隆+吡嘧磺隆对三棱草均有一定效果;从杂草防除效果来看,10%吡嘧磺隆可湿性粉剂150g/hm2+2,4-D丁酯乳油150ml/hm2和10%吡嘧磺隆可湿性粉剂150g/hm2+30%挫草酮悬浮剂60g/hm2两组药剂配方,对稻田三棱草除草效果好于苄嘧磺隆+吡嘧磺隆.     

土壤磷活化剂在水稻上的应用效果初步研究

本研究结果表明:水稻施用3750ml/hm2土壤磷活化剂拌种和底施225kg/hm2化学钾肥氯化钾效果相同,均能增加棉花的有效穗、穗粒数和功能叶叶面积,并提高产量,与常规施肥相比,土壤磷活化剂拌种棉花有效穗数增加21.3万/hm2,氯化钾处理有效穗数增加22.95万/hm2;穗粒数分别增加10.90粒和8.77粒;功能叶叶面积分别增加50.37cm2和27.97cm2;产量提高20.1%和22%,经方差分析,增产效果达极显著差异水平.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the