Results 41 to 50 of about 27,586 (214)
Shuitu Baochi Xuebao, 2022 淤地坝作为黄土高原重要的碳储库，其深层土壤有机碳稳定性在很大程度上影响坝地土壤储碳能力和碳排放。以黄土丘陵区不同利用年限的坝地为对象，从坝地剖面土壤有机碳含量及其组分入手，研究不同利用年限、不同沉积深度下，土壤有机碳含量及其稳定性的变化特征和影响因素。结果表明：（1）坝地深层土壤有机碳（SOC）含量低于该区坡耕地表层土壤有机碳含量，并未呈现明显的有机碳富集现象。随利用年限增加，坝地SOC含量呈增加趋势。（2）不同利用年限坝地的SOC、易氧化碳（EOC）、微生物量碳（MBC）、水溶性碳（DOC ...
周仕轩 +5 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Because magnetic permeability is an intrinsic property of materials, achieving the regulation of magnetic loss is one of the challenges for electromagnetic wave absorption materials. This paper focuses on the research idea of in situ growth of dispersed nanocrystalline FeSiB in an amorphous FeSiB matrix to regulate magnetic properties.
Lei Wang +4 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The electrocatalytic water splitting technique was widely taken for hydrogen evolution, due to its cost‐effectiveness and environmental friendliness. The design of electrode material as electrocatalysts play a key role in achieving high efficiency.
Yaling Zhu +5 more
wiley +1 more source
, 2017 温室气体排放引起的以全球变暖为主要特征的气候变化已经极大的影响了世界人民的生产、生活，并且已经渐变为国际社会普遍关注的焦点。温室气体主要来自第二产业和第三产业，但快速发展的农业增加了温室气体的排放量，加速了气候变暖。虽然农业是碳源，但是农业能够固碳，具有强大的碳汇生态功能，碳减排潜力巨大。基于此，本文选择经济落后环境脆弱而且以农业经济为主导的和田地区为研究区，探讨农业碳效应，并尝试建立农业碳汇补偿机制，以期促进扶贫开发，增加农民收入，推动农业可持续发展，同时也为应对全球气候变化做出应有的贡献 ...
熊传合
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Shuitu Baochi Xuebao, 2019 为探明碳氮添加4年后，土壤全氮、有机碳及其组分（可溶性有机碳、微生物量碳、轻组和重组有机碳）的变化特征，依托布设于甘肃省定西市安定区李家堡镇的不同碳源配施氮素田间定位试验，涉及秸秆、生物质炭、氮素3个因素，秸秆设置为不施、施用秸秆2水平）生物质炭为不施和施用生物质炭2个水平）氮素设置为不施氮、施纯氮50 kg/hm2、施纯氮100 kg/hm2 3个水平，共9个处理。结果表明：不同处理下土壤全氮、有机碳及其组分的含量均随土层的加深而降低。添加生物质炭对土壤全氮、有机碳及其组分均具有不同程度的提升效应 ...
江晶 +4 more
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Functional Ecology, Volume 40, Issue 6, Page 1725-1739, June 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Root exudates play a key role as signals and nutrients in mediating plant–microbe communication. However, critical knowledge gaps remain regarding how root exudates mediate soil–microbe–plant interactions to regulate crop yield under long‐term straw mulching combined ...
Jiajie Song +7 more
wiley +1 more source
, 2015 本申请公开了一种聚氨酯纤维及其制备方法。该聚氨酯纤维含有碳碳不饱和双键，直径为200nm至1000nm，数均分子量为15000至35000，所述聚氨酯纤维中硬段的质量百分含量大于50％。该聚氨酯纤维以溶解有含碳碳双键的聚氨酯的有机溶液A为原料，通过电纺丝方法制备得到。该方法直接使用含有碳碳双键的聚氨酯，通过电纺丝制备超细纤维，无需纺丝后改性即可获得含功能性基团的聚氨酯纤维。该方法得到的聚氨酯纤维形貌均匀，比表面积大，且分子结构中含有碳碳双键，有利于其他官能团的进一步修饰，在固载催化剂、传感 ...
张立生 +4 more
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Dianci bileiqi采用常规固相烧结法制备了碳-陶瓷线性电阻，观察了淀粉、炭黑、乙炔炭黑、石墨等不同碳填料制备的碳-陶瓷线性电阻导电网络的形成过程，并研究了碳填料对电阻体积密度、抗折强度、电阻率、热膨胀系数等性能的影响。结果表明，相同添加量下，粒径与密度越小的碳填料能过占据更大的体积，更利于导电网络的形成，但同时也会影响材料的烧结致密化，导致电阻抗折强度的较低；电阻率相同时，以炭黑作为填料制备的电阻具有更高的抗折强度。
段行辉 +4 more
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Functional Ecology, Volume 40, Issue 6, Page 1921-1932, June 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Most terrestrial plant species form symbioses with arbuscular mycorrhizal fungi (AMF). However, the below‐ground carbon (C) allocation of plants and the nutritional and growth benefits provided by AMF within this symbiosis vary greatly across species and environments ...
Hengjun Zhao +3 more
wiley +1 more source