Results 81 to 90 of about 33,994 (155)

配施有机肥减氮对川中丘区土壤微生物量与酶活性的影响

open access: yesShuitu Baochi Xuebao, 2017
通过田间减施氮肥试验,设置减氮20%+不施有机肥(N1O0),减氮20%+普通有机肥(N1O1),减氮20%+生物有机肥(N1O2),减氮40%+不施有机肥(N2O0),减氮40%+普通有机肥(N2O1),减氮40%+生物有机肥(N2O2)处理,以不施肥(CK0)和全氮100%(N100)为对照,研究配施有机肥减氮对川中丘区玉米土壤微生物量碳、土壤酶活性及玉米产量的影响,为玉米生产减氮增效提高玉米氮素利用率提供理论依据。结果表明:随施氮量减少土壤脲酶、蔗糖酶、过氧化氢酶活性及微生物量碳含量逐渐降低 ...
王兴龙   +7 more
doaj  

Bidirectional Interfacial Chemical Regulation Enables Durable Aqueous Zn‐I2 Batteries

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Aqueous Zn‐I2 batteries hold great promise for large‐scale energy storage, yet their practical deployment is hindered by coupled interfacial instabilities at both electrodes, where Zn‐anode parasitic reactions and cathodic polyiodide shuttle mutually aggravate each other.
Zimian Jia   +8 more
wiley   +1 more source

盐胁迫对棉田土壤微生物量和土壤养分的影响

open access: yesShuitu Baochi Xuebao, 2011
以耐盐品种中棉所44为材料,模拟滨海混合盐土成分,研究了正常灌水(土壤相对含水量保持在75±5%)和轻度干旱(55±5%)下,不同程度盐胁迫(0,0.35%,0.60%,0.85%,1.00%)对棉田土壤微生物量和土壤养分的影响.结果表明,棉花产量及产量构成(铃数和铃重)、生物量、根重均随着盐浓度的升高而显著递减.棉田土壤微生物量C和N在棉花各个生育期内均随着盐浓度的升高而显著降低,花铃期达到最大,土壤有机质、全氮、速效N、有效P、速效K等养分含量的变化趋势与土壤微生物量C和N基本一致,但降幅较小 ...
路海玲   +5 more
doaj  

Comparative Investigation on the Impact Abrasive Wear Behavior of PTAW NiBSi Coatings Reinforced With Different Types of Tungsten Carbide

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT NiBSi‐based coatings reinforced with spherical cast tungsten carbide (NSC coating), irregular cast tungsten carbide (NC coating), and macrocrystalline tungsten carbide (NMC coating) are investigated to elucidate the impact of abrasive wear behavior.
Chong Chen   +9 more
wiley   +1 more source

不同施水量对黄芩干物质积累与分配的影响

open access: yesShuitu Baochi Xuebao, 2006
为研究施水量对黄芩的影响,确定适宜黄芩生长的水分条件,在黄芩生长季节模拟降水量设4种不同施水量处理,测定黄芩生长形态指标和各器官干物质重量,计算黄芩各器官干重占总生物量大小。结果表明,施水量多的处理和施水量少的处理根干重、地上千重、总生物量较低,施水量不足对黄芩地上部的影响大于对根部的影响;中度和轻度水分胁迫处理黄芩根重、地上重、总生物量较高;黄芩比较耐旱,年降水量在321~450mm,黄芩生长季节降水量在250~350mm,黄芩地上部与地下部生长协调,各器官物质分配合理,产量高。
邵玺文   +4 more
doaj  

Superstrong and Tough Biomimetic Lignin‐Based Hydrogel Enabled by Self‐Diffusion Driven Strategy for Self‐Powered Human Dynamic Healthcare Monitoring

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Biomass‐based hydrogels are widely regarded as ideal substrates for self‐powered wearable sensors. However, the practical applications of hydrogels are commonly limited by their inherent low strength and toughness, which restrict their capacity to withstand repeated stretching, bending and other mechanical loads arising from human motion in ...
Boyu Du   +9 more
wiley   +1 more source

湘中丘陵区4个树种人工纯林土壤-微生物-胞外酶C∶N∶P化学计量特征

open access: yesShuitu Baochi Xuebao
目的不同树种人工林因养分吸收利用策略的差异,导致土壤碳(C)、氮(N)、磷(P)质量分数及其化学计量比的改变显著影响土壤微生物活性,土壤微生物是否通过调整自身生物量和胞外酶化学计量比适应土壤的变化仍不明确。为探究不同树种人工林对土壤微生物生物量和胞外酶活性的影响,研究土壤-微生物-胞外酶C∶N∶P化学计量比之间的协变性。方法以湘中丘陵区土壤发育、经营历史一致,不同生活型的4个树种[针叶树马尾松(Pinus massoniana)、落叶阔叶树枫香(Liquidaar formosana)、常绿阔叶树木荷 ...
卢巧露   +6 more
doaj  

Manipulating RE‐O Bonds Engineered Thermal/Oxygen Transport Characteristics of Monoclinic‐Prime RETaO4 High‐Entropy Ceramics

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Multifunctional thermal protective ceramic thermal/environmental barrier coatings (T/EBCs) are of great significance for applications of various high‐temperature components, and we propose an effective strategy for designing high‐entropy ceramics (HECs) as T/EBCs for SiC ceramic matrix composites (CMCs), where low thermal expansion ...
Qinshuo Wang   +7 more
wiley   +1 more source

Biomass‐Derived Laser‐Induced Graphene: From Precursor Chemistry to Device Integration

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Laser direct writing provides a mask‐free route for converting suitable carbon‐containing precursors into patterned, porous, and conductive laser‐induced graphene (LIG) networks. Although LIG was initially demonstrated mainly using aromatic synthetic polymers, such as polyimide, biomass precursors introduce renewable feedstocks with highly ...
Wanjun Yin   +10 more
wiley   +1 more source

保护性耕作对土壤微生物特性及酶活性的影响

open access: yesShuitu Baochi Xuebao, 2006
大田试验研究了保护性耕作对土壤微生物量、活跃微生物量、土壤呼吸、呼吸商、土壤酶的影响。结果表明,秸秆还田能够显著提高土壤微生物量碳和活跃微生物量,深松耕还田能显著提高土壤活跃微生物量。随耕作作业之后时间的推迟,活跃生物量减小。秸秆还田初期(小麦越冬期)能显著提高土壤呼吸作用,提高99.7%;后期(小麦播种期)能显著降低土壤呼吸,降低16.6%。随耕作作业之后时间的推迟,秸秆还田和保护性耕作都会减少农田向大气中CO2的排放,减少土壤碳库的亏损。深松耕还田显著提高土壤脲酶、蔗糖酶活性 ...
王芸   +7 more
doaj  

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