25 resultados para teaterstriden 1916
Resumo:
在下辽河平原地区就稻田不同水分管理方式对土壤线虫多度、营养类群、群落组成的影响进行了研究 .结果表明 ,0~ 10cm土层不同水分管理处理的线虫总数在耙耕前和黄熟期显著低于对照 ,10~ 2 0cm土层各时期处理间线虫总数的差异不显著 ,2 0~ 30cm土层线虫总数在耙耕前和黄熟期差异极显著 .北方单季稻水田试验共观察到土壤线虫 16科 2 2属 .绕线属 (Plectus)、垫刃属 (Tylenchus)、单宫属 (Mon hystera)是优势属 ,绕线属和垫刃属对不同的水分管理比较敏感 .在耙耕前和黄熟期不同水分管理方式对 0~ 10cm土壤食细菌线虫能够产生显著影响 .稻田土壤中食细菌线虫和植物寄生线虫是优势营养类群 ,而捕食 /杂食性线虫的相对多度最低 .
Resumo:
<正> 3 综合防护林体系布局与配置 辽河三角洲综合防护林体系建设是调整该区农业生态结构的一项重大战略措施,将保证三角洲高效开发能力,杜绝或减轻开发活动对环境要素各种不良影响。防护林体系
Resumo:
利用6,6-环戊烷基富烯与芳基锂作用形成的取代环戊二烯基锂,与双(环戊二烯基)四氯-μ-氧合二钛反应这一新的合成方法,制备了(η~5-环戊二烯基)[η~5-(1-(4-甲氧基苯基)环已烷基)环戊二烯基]二氯化钛(I).元素分析、核磁、红外、质谱分析确认合成产物为
Resumo:
Interfacial internal waves in a three-layer density-stratified fluid are investigated using a singular method, and third-order asymptotic solutions of the velocity potentials and third-order Stokes wave solutions of the associated elevations of the interfacial waves are presented based on the small amplitude wave theory. as expected, the third-order solutions describe the third-order nonlinear modification and the third-order nonlinear interactions between the interfacial waves. The wave velocity depends on not only the wave number and the depth of each layer but also on the wave amplitude.
Resumo:
More and more exploration practises and research results prove that deep-water turbidites and slump turbidites in abrupt slope belt as well as slump turbidites in deposit center are favorable places to find subtle reservoirs. Based on sedimentology, sequence stratigraphy, tectonics and petroleum geology and with the tool of computer, this paper focused a set of questions such as the forming mechanism and m&a of turbidite reservoir in Dongying Sag, and obtained a systematic research result from available information of geology, seismic survey, well logging and testing, etc. Since the structural pattern and tectonic stress are controlling factors on distribution of turbidite reservoirs, deep-water sequence and shallow-water sequence have close relation with various turbidites. The author primarily disclose the regular pattern of the turbidites in the abrupt slope trouth, and predict that the abrupt slope is mainly connected to near-bank slump turbidite fans and deep-water turbidite fans; whereas the depocenter area usually developed with front delta slump fans. According to this, seismic-geology models corresponding to various deposit systems can be set up as a principle for predicting the turbiditea in faulted lacustrine basins. Based on comprehensive study of the turbidite reservoir forming condition and main controlling factors, a differential accumulation model and a multiple migration&accumulation model were also set up for abrupt slope turbidities. Referenced the m