Results 21 to 30 of about 2,846 (161)
在绿色农业科技的推动下,有机物料资源化利用备受青睐,但有机物料种类不同对土壤肥力的提升效果不同,为探究有机物料施用对潮土不同形态碳氮含量及酶活性的动态影响,通过为期1年的培养试验,设置添加10 g/kg的秸秆菌渣(S)、树枝菌渣(B)、小麦秸秆(W)、黑麦草秸秆(R)和蚕豆秸秆(BB),并以空白处理作为对照(CK)。结果表明:与CK相比,有机物料施用显著增加土壤不同形态碳氮含量及酶活性,随培养时间的延长,有机碳及全氮含量呈增加的趋势,增幅分别为25.4%~42.9%和35%~60 ...
杨苏 +6 more
doaj
ABSTRACT Piezocatalytic technology utilizes mechanical strain or stress‐induced piezoelectric phenomena to produce robust internal electric fields, markedly improving the separation efficiency of e−‐h+ pairs. This method has emerged as a focal point in catalysis by removing reliance on conventional light or electrical energy via its mechanical‐to ...
Yue Zhou +5 more
wiley +1 more source
Cu‐Based Catalysts Design Toward Electrochemical CO2 Reduction to Valuable Multi‐Carbons Products
ABSTRACT Electrochemical reduction of CO2 to multi‐carbon products (e.g., C2+, ethene, ethanol, etc.) not only effectively decreases the CO2 concentration in atmosphere but also shows great potential economic benefits due to these exploitable value‐added products. The Cu‐based catalysts have caught much attention in CO2 electroreduction due to the good
Li‐Qing Li +5 more
wiley +1 more source
以内蒙古河套灌区苏打碱化土为研究对象开展田间试验,设置常规施肥(CK)、生物炭+常规施肥(BC)、牛粪+常规施肥(CD)、玉米秸秆+常规施肥(SW)和羊粪+常规施肥(GM)5个处理,研究不同有机物料添加对碱化土壤有机碳(SOC)库和化学性质的影响。分别于2019年和2020年收获季采集0—30 cm耕层土壤,分析不同有机物料添加下SOC及其活性碳组分和主要盐碱指标的变化特征及其相关关系。结果表明:与CK相比,2019年和2020年各有机物料添加处理下SOC平均增幅分别为22.7%和17.2 ...
张月鲜 +6 more
doaj +2 more sources
The impacts of nutrients and organic carbon availability on microbial carbon utilization and its consequences [PDF]
海洋作为地球上重要的碳库,在全球气候变化的背景下,受到广泛关注。其中微型生物在海洋碳循环过程中发挥了重要作用。传统研究认为,环境营养盐浓度的提高可以增加初级生产力,固定更多的CO2,因此有利于储碳;而微型生物碳泵的生态学原理指出,过量营养盐会刺激细菌利用环境中的惰性有机碳,不利于储碳。即,固碳不等于储碳。同时,土壤和淡水环境的研究发现,在外源活性有机碳输入的条件下,原位环境的惰性有机碳会被加速利用,导致更多有机碳被消耗,称为“激发效应”(PrimingEffect,PE)。PE在碳循环中具有重要意义 ...
刘纪化
core
ABSTRACT Prelithiation is effective for compensating active lithium‐ion (Li+) loss in silicon (Si)‐based battery electrode materials. However, owing to the dynamic growth of the solid electrolyte interface (SEI), capacity fading remains the biggest challenge for the industrialization of Si electrodes.
Wen‐Jie He +9 more
wiley +1 more source
为探明坡耕地土壤有机碳空间分布特征,对紫色土丘陵区坡耕地不同部位土壤有机碳及活性有机碳顺坡和深度分布进行分析。结果表明,坡耕地上坡土层深度仅为22.3 cm,中坡和下坡土层深度约为上坡的2.01倍和3.30倍;与上坡比较,中坡和下坡土壤容重下降了0.2和0.04,土壤孔隙度增加了19.82%与3.83%。沿坡从上向下土壤有机碳及活性有机碳储量显著增加,下坡土壤有机碳及活性有机碳储量比上坡和中坡分别增加了674.74%,104.09%和958.51%,267.75 ...
樊红柱, 张泽洪, 郭, 蒋
doaj
ABSTRACT Formic acid (FA) is considered to be a safe and convenient hydrogen source; however, achieving controlled and efficient FA dehydrogenation under mild conditions using stable solid catalysts remains a significant challenge. Pd‐based catalysts have been extensively studied due to their superior catalytic activity to other metal catalysts.
Shuai Wei +10 more
wiley +1 more source
对若尔盖高寒湿地沼泽土和泥炭土的有机碳(TOC)和活性有机碳(LC)沿土壤剖面的分布特征研究表明,沼泽土的有机碳和全氮(TN)古量整体上从表层向下呈现下降趋势.中间在16~18cm处出现一个升高点,与当时的有机质来源和沉积环境有关。泥炭土有机碳沿土壤剖面并没有呈现同样的下降趋势.而是从表层向下至22cm呈现升高趋势,22cm向下才呈现下降趋势。全氮含量与有机碳含量的分布特征不同。在表层o~10cm古量较高,向下含量减小。沼泽土活性有机碳沿土壤剖面整体呈现下降趋势,变化于2.4~13.6mg/g ...
高俊琴, 欧阳华, 白军红
doaj
深海碳库成因之谜气候变化是当今最大的全球性环境问题。人类活动导致大气二氧化碳(CO2)持续升高是加剧气候变化的主因。海洋是地球上最大的碳库,吸收了工业革命以来人类活动排放CO2的三分之一,是全球气候变化的"调节器"。海洋碳库调节气候变化的主要组分是溶解在水里的有机碳(DOC)。一方面 ...
焦念志
core

