Results 21 to 30 of about 259,513 (162)
Shuitu Baochi Xuebao, 2023 为比较单施尿素与尿素和缓释肥配施对云南坡耕地径流氮流失、土壤养分及青贮饲用玉米生长的影响作用。通过自然降雨下的径流槽试验,在等氮条件下按云南常规施肥量设置单施尿素(CK)、添加硝化抑制剂速溶诺泰克®21等氮替代40%的尿素+60%普通尿素(处理I)和聚谷氨酸增效3代等氮替代40%的尿素+60%普通尿素(处理Ⅱ)3个处理。结果表明:生育期内尿素配施缓释肥的处理I和处理Ⅱ与单施尿素CK处理相比,总氮、铵态氮和硝态氮流失浓度削减量最高分别为2.59,1.60,1.42 mg/L和1.61,1.38,1.25 ...
陈佳钰 +5 more
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The development of lightweight, high‐attenuation, and broadband carbon‐based electromagnetic wave absorbers is hindered by the intrinsic trade‐off between impedance matching and dielectric dissipation. Herein, we report a facile and scalable synthesis of N‐doped lignin‐derived interconnected porous carbon (Nx‐LIPC) via hydrogen‐bond self ...
Bin‐Peng Zhang +7 more
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Shuitu Baochi Xuebao, 2017 在黄淮海地区冬小麦中高产田采用小区试验，以普通尿素基施、普通尿素基施加追施作对比，研究脲醛氮占总氮30%，40%，50%，60%，70%的不同脲醛缓释掺混肥在田间的氮素养分释放特征，以及对土壤氮素养分、小麦产量、氮素利用率及经济效益的影响，探明合理施用脲醛缓释肥最优氮素配比，以达到增加产量、节约资源、增加经济效益的目的。结果表明：脲醛掺混肥氮素释放量在小麦生育进程中呈现高低再高低的变化过程，脲醛氮占总氮40%或50%最有利于土壤氮素供应，脲醛氮所占比例过大或过小，都不利于小麦整个生长期氮素供应 ...
周华敏 +5 more
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Functional Ecology, Volume 40, Issue 5, Page 1428-1442, May 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract The stoichiometric imbalance caused by nitrogen (N) deposition typically exacerbates phosphorus (P) limitation in plants. However, it remains unclear whether this effect extends to soil microbes, particularly those in the rhizosphere.
Jipeng Wang +5 more
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Shuitu Baochi Xuebao, 2004 对小麦氮素营养与籽粒灌浆期氮素转移研究进展进行了综述。过去进行的大量研究结果表明,小麦籽粒最终累积的氮素有相当一部分来自于灌浆期间营养器官中氮素的再转移,来自营养器官氮(内源氮)与土壤中新吸收氮(外源氮)的比例基本上是1:2。因此,花后营养器官氮素营养水平是决定小麦籽粒产量、籽粒中氮素累积量和蛋白质含量的一个重要因素。灌浆期间营养器官氮素向籽粒发生转移的同时,常常伴随着叶片光合性能的下降和叶片的衰老。不同基因型品种在灌浆期的氮素转移程度不同,表现为随品种演替,旗叶、茎秆和叶鞘中氮素的输出率增加 ...
李世清 王瑞军 张兴昌 伍维模 邵明安
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Graphitic carbon nitride (g‐C3N4) doped with 3d transition metals (3d‐TM@g‐C3N4) has gained attention as a noble metal‐free alternative for oxygen evolution and reduction reactions (OER/ORR). Yet the key mechanisms driving its performance remain debated, especially across different charge states.
Jing Zhang +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.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
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The development of novel oxygen electrocatalysts with cost‐effectiveness, scalability, high catalytic activity, and stability presents a significant challenge for zinc–air batteries (ZABs). The nitrogen‐rich lignin coordination network structure is synthesized through amine modification of lignin.
Ping‐Xian Feng +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2018 为探明缓释尿素与普通尿素掺混比例对安徽小麦花后氮素运转特征和土壤氮素盈余的影响，分别选择安徽省北方小麦产区小麦—玉米轮作和南方小麦产区小麦—水稻轮作方式，土壤类型分别为两合土和黄棕壤，设置不施氮肥处理（CK）、农民习惯处理（Ncon）、减少普通尿素用量的优化氮素处理（Nopt）、缓释尿素及其掺混普通尿素处理（SRU1、SRU2、SRU3）和普通尿素全部基施处理（SRU4），分析了不同施肥处理在两种土壤上小麦花后氮素转运、产量、氮肥利用率和土壤无机氮积累量。结果表明：与黄棕壤比较 ...
袁嫚嫚 +5 more
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Functional Ecology, Volume 40, Issue 4, Page 983-1000, April 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra +3 more
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