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.     

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.     

A computer generator for randomly layered structures

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

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.