Results 21 to 30 of about 7,036 (116)
Shuitu Baochi Xuebao, 2011 大量施用农业化学物质在提高作物产量的同时,也导致了严重的水体污染。在北京地区不同坡度的径流小区上,通过人工模拟降雨试验,研究免耕、草篱、以及免耕与草篱复合3种措施对农田径流中氮、磷、阿特拉津3种典型农业面源污染物的去除效果。结果表明:免耕措施可减少53%的总氮、51%的总磷和56%的阿特拉津流失;草篱措施可减少68%的总氮、61%的总磷和90%的阿特拉津流失;而免耕与草篱复合措施可减少77%的总氮、76%的总磷和92%的阿特拉津流失。另外,总氮、总磷和阿特拉津流失量均与径流量呈显著的线性正相关关系 ...
李霞 +4 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Most high‐entropy alloys (HEAs) tailored for contaminant degradation suffer from complex fabrication processes and high‐cost alloy design. Furthermore, low‐cost active elements such as Fe and Mg cannot be readily alloyed into HEAs via conventional routes.
Jiajia Si +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 采用野外田间试验,研究了浙北平原不同施氮水平对油菜地土壤氮素流失形态与含量的影响。结果表明,施肥的时间与降雨间隔对氮素的流失形态和浓度有明显影响,硝态氮是氮素流失的主要形态,占流失无机氮的比例为0.56～0.95;但若施肥后短期内降雨,铵态氮流失占有量增加,占流失无机氮的比例为0.37～0.42;氮素的流失量与施肥水平明显相关,每1hm2土壤增加氮素用量60kgN时,流失负荷增加2.5%～16.1%;采用有机无机配施的模式可使油菜地土壤氮素流失减少8.6%～16.3%,有效降低径流水中氮素浓度 ...
俞巧钢 +7 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Mechanical dynamic sealing components are usually subjected to the erosion of a hydrothermal environment; thus, the selected service materials must meet stringent requirements for superior self‐lubrication, corrosion resistance, and thermal stability.
Yanchun Zhao +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 以太湖地区典型水稻土——水耕铁渗人为土为供试材料,通过添加CaCO3和H2SO4培养及滴定的方法,研究不同pH降雨和施氮对土壤酸碱缓冲体系的影响。结果显示,土壤在添加CaCO3和H2SO4培养后进行不同量酸碱滴定,土壤在pH 4.0~7.5的突跃范围内与酸碱加入量呈显著的线性相关,表明该测定方法对供试土壤适用。同时施氮和降雨对土壤的酸化都有加速作用,各处理0-40 cm层土壤酸碱缓冲容量为1.91~2.20 cmol/kg,增加施氮量、降低降雨pH都降低土壤的酸碱缓冲容量 ...
汪吉东 +6 more
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Wafer‐Scale Amorphous g‐C3N4 With Broadly Tunable Dielectric Properties for 2D Electronics
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Two‐dimensional (2D) semiconductors are regarded as promising candidates for next‐generation electronics due to their superior electrostatic control; however, their performance is severely constrained by the lack of suitable dielectric materials.
Binyin Gao +13 more
wiley +1 more source
干旱河谷-山地森林交错带植被调控模式对土壤氮、磷强度及库的影响
Shuitu Baochi Xuebao, 2011 以调控30个月的4种典型调控模式以及未调控退耕纯林为研究对象,比较分析了不同调控模式下氮、磷供强度及库容特征.结果表明,相对于纯林模式,4种调控模式均可有效缓解缺氮少磷的土壤现状,提高或增加了固氮效率以及氮、磷储量,且表现出氮、磷元素聚表分布(0-10 cm)的特征;表层土(0-10cm)中,刺槐+扁桃+紫花苜蓿模式的氨态氮含量(10.52士0.34 g/kg)、硝态氮含量(11.69±1.06 g/kg)显著高于其它模式,对植物生长极为有利,但对氮、磷的储存贡献较小;刺槐+新疆杨 ...
刘彬 +7 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Methanol‐assisted hydrogen generation reduces energy consumption while maintaining high hydrogen productivity. However, constructing bifunctional catalysts with high hydrogen evolution reaction (HER) activity, CO tolerance, and long‐term stability remains challenging.
Xiaoyu Zheng +5 more
wiley +1 more source
Functional Ecology, Volume 40, Issue 7, Page 2068-2082, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Grasslands worldwide are experiencing severe degradation due to overgrazing, climate change and anthropogenic disturbances, resulting in substantial declines in biodiversity and ecosystem functioning.
Xiaoqi Wang +5 more
wiley +1 more source
Functional Ecology, Volume 40, Issue 7, Page 2332-2344, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract The stoichiometric ratios of carbon (C), nitrogen (N) and phosphorus (P) serve as important indicators for assessing nutrient balance in forest ecosystems, but their relationships with photosynthetic dynamics require deeper characterization.
Minghao Chen +9 more
wiley +1 more source