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黄粉虫粪在黄瓜育苗中的应用 总被引：1，自引：0，他引：1
采用在育苗营养土中搀入黄粉虫粪的方法营养土中黄粉虫粪搀入量对马坊营早黄瓜幼苗生长的影响。结果表明：黄粉虫类与营养土按1：1．60-320(体积比)混配的基质进行黄瓜育苗，能促进幼苗生长，显著提高幼苗简单指标、相对指标和复合指标的值。 相似文献
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Lattice-matched InAlN/AlN/GaN high electron mobility transistors (HEMTs) grown on sapphire substrate by using low-pressure metallorganic chemical vapor deposition were prepared, and the comprehensive DC characteristics were implemented by Keithley 4200 Semiconductor Characterization System. The experimental results indicated that a maximum drain current over 400 mA/mm and a peak external transconductance of 215 mS/mm can be achieved in the initial HEMTs. However, after the devices endured a 10-h thermal aging in furnace under nitrogen condition at 300 ℃, the maximum reduction of saturation drain current and external transconductance at high gate-source voltage and drain-source voltage were 30% and 35%, respectively. Additionally, an increased drain-source leakage current was observed at three-terminal off-state. It was inferred that the degradation was mainly related to electron-trapping defects in the InAlN barrier layer. 相似文献
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俄罗斯人的姓名是南姓、名、父称三部分组成.在俄罗斯民族的历史上,组成俄罗斯姓名的三部分不是同时出现的.最早形成的是名字,随后是父称,最后才有了姓氏.据文字记载,俄罗斯人在14世纪才有了姓.最先有姓的是王公贵族,他们的姓形成于14至16世纪中期.地主的姓形成于16至17世纪,而市民(除有名望的商人外)的姓到了19世纪没有完全确定,神职人员在18至19世纪上半叶才有了自己的姓.大部分王公贵族的姓与他们的领地及出生地有关,例如,姓"舒伊斯基"的贵族的领地在舒亚城和舒亚河一带.古时.多半俄罗斯人没有姓,所以同名的人很多.据史料记载,人们是用父称和绰号来加以区分的. 相似文献
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