Results 21 to 30 of about 364,408 (160)
近30年玛纳斯河流域土地利用/覆被变化对植被碳储量的影响 [PDF]
, 2010 天然植被退化,部分转变为人工植被和人类聚居区是干旱区绿洲过程的重要表现之一,而目前对土地利用变化影响植被碳储量的机制还不十分清楚。论文尝试采用CASA模型及1976—2007年4期9月份Landsat卫星影像估算玛纳斯河流域9种植被类型的净初级生产力,并通过植物枯损模型估算了流域内植被碳密度,进而估算出流域内各类型植被碳储量,最后分析土地利用/覆被类型间的转移对植被碳储量的影响。结果表明,在1976—2007年间,受农作物种植结构及品种变化影响,绿洲农田植被碳密度变化较大;同期流域植被碳储量共增加了50.
陈晓娜 +5 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Size‐controllable Sn nanoparticles are designed in this work via oxide doping to be uniformly embedded into flexible N‐doped carbon nanofibers, in which the agglomeration and migration of Sn are effectively restrained due to the suppressive effect of selected oxides, including SiO2, TiO2, and ZnO. Benefiting from unique merits of the embedment
Yu Xin +6 more
wiley +1 more source
中亚干旱荒漠区植被碳储量估算/Evaluation of vegetation biomass carbon storage in deserts of Central Asia[J] [PDF]
, 2013 荒漠是陆地生态系统的重要组成部分,荒漠植被碳储量研究是陆地生态系统碳循环研究的重要内容之一.中亚五国及中国准噶尔荒漠是中亚干旱区的主体部分,目前关于该地区荒漠植被碳储量的研究尚属空白.在对准噶尔荒漠不同植被类型活生物量碳大规模调查的基础上,结合中亚干旱荒漠区植被图,利用平均生物量法初步估算了中亚区域荒漠植被碳储量.结果表明:中亚区域荒漠面积共310.37×104 km2,总生物量碳储量为57.03×l07 t,地上、地下生物量碳分别为28.87×107 t和28.16×107 t,各占50.63％和49.
陶冶 +4 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The utilization of carbonaceous anodes in electrochemical systems, particularly potassium‐ion batteries (PIBs), remains hindered by sluggish kinetics and modest capacities, which are caused by the intrinsic ion storage mechanisms and constrained interlayer spacings.
HaiSong Chen +7 more
wiley +1 more source
, 2007 同步研究了川西亚高山云杉林、冷杉林和白桦林生态系统土壤有机层(OL)和矿质层(MS)的有机碳、全氮及全磷储量特征.所有土壤剖面上的有机碳和易氧化有机碳含量均随土壤深度增加而降低 ...
邓仁菊 +6 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Alkali metal–chalcogen batteries (AMCBs) are one of the most promising next‐generation energy storage systems because of their high energy density and reasonably low cost. However, the practical application of AMCBs is severely hindered by the volume expansion of the chalcogen cathode, the shuttle effect of polychalcogenides, and unstable ...
Yong Liu +11 more
wiley +1 more source
三江平原湿地不同土地利用方式下土壤有机碳储量研究 [PDF]
, 2009 选取东北三江平原沼泽湿地5种土地利用方式,共16个土壤剖面,对土壤有机碳储量分布特征进行了研究.结果表明,不同土地利用方式下,土壤剖面有机碳含量与有机碳密度均呈自上而下降低的趋势,且随着深度的增加,垂直差异变小.开垦降低了土壤有机碳含量和有机碳密度,并改变了其在表层的分布结构特征.初步估算5种土地利用方式下土壤有机碳储量分别为:沼泽湿地1.58×104t/km2、退耕还湿地1.23×104t/km2、林地1.01×104t/km2、水田0.85×104t/km2、旱田0.99×104t/km2 ...
王丽丽 +4 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Bismuth anode materials are considered promising anode candidates for sodium–ion batteries (SIBs) due to their high theoretical capacity and appropriate working potential. Nevertheless, the significant volume expansion that occurs during the cycling process restricts its broader application in sodium–ion storage. Herein, Bi/Bi2O3 nanoparticles
Jiaju Lu +3 more
wiley +1 more source
干旱区棉田土壤剖面有机碳和全氮含量垂直分布特征及碳储量变化/Changes in Carbon Storage and Vertical Distribution Characteristics of Soil Organic Carbon and Total Nitrogen in Cotton Fields of Arid Regions[J] [PDF]
, 2012 以休闲地为对照,对准葛尔盆地南缘典型干旱区棉田土壤有机C、全N垂直分布状况进行了研究.结果表明:(1)从垂直分布上看,土壤有机碳、全N、C/N随着土壤深度的增加而降低,且0～30 cm土层明显高于30 cm以下.棉花生长初期,棉田与休闲地有机碳含量差异不明显;到生长后期,棉田与休闲地有机碳含量差异明显,并且休闲地土壤有机碳逐月下降.(2)棉田土壤全N与土壤有机碳含量之间存在显著的线性正相关;(3)棉田土壤有机碳储量变化情况,棉花开始生长时,0～30 cm和0～90 cm土层有机碳储量降低,到花期(7月 ...
中国科学院研究生院,北京100049 +9 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Driven by global energy transition and sustainability, sodium‐ion batteries (SIBs) have emerged as key alternatives to lithium‐ion batteries for low‐to‐medium energy storage, because of abundant sodium resources and low cost. However, their commercialization is hindered by the lack of anodes with high capacity, fast kinetics, and long‐term ...
Shuang‐Lin Cai +13 more
wiley +1 more source