黄土改造过程中微量元素的变化

来源 :地球化学 | 被引量 : 0次 | 上传用户:letter0110
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
It is evident that active Zn, Cu, Mo and substituted Mn will be gradually inereasing with time after loess is reclaimed into Dazhai farmland. The effective content of Zn has shown a remarkeble inerease even after a planting season within a year's time
其他文献
Described in this paper is a double-decked vacuum giass isolating set built in the fire cracking instrument. It is characterized by high sensitivity and as bein
Summing up the abundant experience obtained by the author through many years of his work in mineral separation, an inversion formula has been proposed for calcu
According to the evolution of alkali elements (e.g. K, Na, Li) and the relationship among them in the melt-solution of pegmatitic magma the author has divided t
我们采取放射免疫活测定血、尿β_2—微球蛋白,观察100例高血压患者不同时期对肾脏的损害,并与常规肾功能指数尿素氮(BUN)、肌酐(Cr)、内生肌酐清除率(Ccr)作比较。结果表明:
蛲虫病是危害儿童身心健康的寄生虫病,但有些家长和幼儿园的老师对蛲虫病却缺乏认识,思想上不重视,行动上无防治措施。1977~1981年衡阳市儿童的蛲虫感染率为34.7%,但近年来的抽
Andy:大家好,我是Andy Plata。Julie:我是Julie Plata。很高兴今天能在这里为大家演讲。我和Andy共同拥有一些服务于全球印刷业的公司。我们也为全球许多印刷类刊物撰文,我想诸位
1982年以来,我们对35例伴明显营养不良的中晚期胃癌病人施行了全胃切除术。8例未采用特殊的营养支持疗法,术后发生食道空肠吻合口痿3例(37%),均死亡;27例经空肠插管早期供给高
<正> 全髋关节置换术,在一些有条件的医院已相继开展,且取得了良好的效果。我院82年开始本手术。现将我院1982~1991年42例全髋关节置换术结合有关文献讨论该手术的并发症及其