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黄河三角洲盐生草甸白茅(Imperata cylindrica var. major)群落季节性动态的研究

O引言 白茅(I mpelata cyl认d汀a var.maj。)群落是我国北方沿海地区滨海盐土上的主要盐生草甸类型之一。在黄河三角洲上,白茅群落分布于草甸滨海盐土上,土壤的全盐量通常为业.0编一2.。%。,有机质含量为1%左右[‘1。由于白茅群落是该地区农牧业生产上的重要割草派和放牧区,经济利用率较高。白茅群落指示着土壤脱盐作用较好,已宜于种植农作物,所产群众“看草开荒”,往往以白茅群落作为垦植的对象工气但整个三角洲地区除沿黄部分外, 足,因此白茅群落仍然是该地区面 位研究是十分必要的。近年来,在 。在沿海盐生草甸上,山东省有关 对璋茅(Ael二opu:lft才。:昨f:var。 究,初步揭示了它的基本特征和生 生产实践的指导上,都可以作为参..J.J,.,...‘.‘.J 一 一 一 ︸ 一 50考的依据。宁波大学学报1自然环境概况 黄河三角洲位于山东省北部,地处北纬37021’一38012‘、东经118030‘一119“...  (本文共7页) 阅读全文>>

《China Nonferrous Metals Monthly》2019年07期
China Nonferrous Metals Monthly

Production of the Ten Major Nonferrous Metals in 2019

Unit:metric tonName of metalProduction inTotal output%ChangeMay. 2019Jan.-May. 20192018-2019Copper710637370736744.39Aluminium2974555144504012.67Lead452296238359315.77Zinc4799002269...  (本文共1页) 阅读全文>>

《China Nonferrous Metals Monthly》2019年07期
China Nonferrous Metals Monthly

Technical and Economic Indicators of Major Enterprise

IndicatorUnitMay. 2019Jan.-May. 2019Change2018-2019Ore GradeCopper%0.710.720.74Lead%2.592.652.73Zinc%5.055.185.33Nickel%1.151.131.20Tin%0.630.660.59Antimony%2.482.372.14Tungsten%0.290.290.29Molybdenum%0.100.100.11Concentrate GradeCopper%22.0022.1321.89Lead%61.5161.0461.00Zinc%50.2850.0750.16Nickel%6.956.926.93Tin%43.9143.1843.86Antimony%28.7328.7028.12Tungsten%52.1751.5151.43Molybdenum%52.8252.5852.44Recovery Rate of...  (本文共2页) 阅读全文>>

《China Nonferrous Metals Monthly》2019年08期
China Nonferrous Metals Monthly

Production of the Ten Major Nonferrous Metals in 2019

Unit:metric tonName of metalProduction inJune. 2019Total outputJan.-June. 2019%Change2018-2019Copper80419145236635.78Aluminium2972564174129302.2Lead474854286720016.66Zinc5131612815...  (本文共1页) 阅读全文>>

《China Nonferrous Metals Monthly》2019年08期
China Nonferrous Metals Monthly

Technical and Economic Indicators of Major Enterprise

IndicatorUnitJune. 2019Jan.-June. 2019Change2018-2019Ore GradeCopper%0.700.720.74Lead%2.612.642.71Zinc%5.065.165.32Nickel%1.121.131.19Tin%0.650.660.57Antimony%2.542.402.21Tungsten%0.270.270.28Molybdenum%0.100.100.11Concentrate GradeCopper%22.0622.1221.82Lead%61.1361.0661.14Zinc%49.7050.0050.17Nickel%7.056.946.93Tin%42.8943.1343.79Antimony%28.8328.7328.35Tungsten%52.9751.7753.16Molybdenum%52.2452.5252.39Recovery Rate ...  (本文共2页) 阅读全文>>

《China Nonferrous Metals Monthly》2018年12期
China Nonferrous Metals Monthly

Production of the Ten Major Nonferrous Metals in 2018

Unit:metric tonProduction inTotal output%ChangeName of metal October. 2018Jan.-Oct. 20182017-2018Copper 735820 7393251 6685975Aluminium 2715461 27714042 26547118Lead 459932 3962438 3657561Zinc 501075 4651...  (本文共1页) 阅读全文>>