Results 1 to 10 of about 4,821 (112)
Shuitu Baochi Xuebao, 2021 为研究施用不同肥料类型（尿素、鸡粪）及用量（349.6，174.8 kg/hm2）下坡面氮素流失规律，采用人工模拟降雨试验方法，探究二者氮素流失差异的原因，并阐述肥料用量对氮素流失量的影响。结果表明：施肥后坡面氮素流失以泥沙全氮流失为主，占比可达78.16%~93.46%；径流硝态氮浓度高于铵态氮浓度，且径流总氮流失以硝态氮流失为主要形式，流失量占径流总氮流失量的38.53%~48.62%。肥料类型对坡面泥沙全氮浓度影响不明显，施用鸡粪处理泥沙硝态氮浓度和铵态氮浓度较高。等氮施用鸡粪可以减少坡面径流总氮、
曲芝旭 +5 more
doaj
Shuitu Baochi Xuebao, 2022 为探明减氮配施缓释氮肥对棉田土壤酶活性和氮素吸收利用的影响,通过试验研究减氮、配施不同比例缓释氮肥对棉花土壤理化性质、酶活性、无机氮含量、氮肥利用率及棉花产量的影响。试验选用"新陆早64号"棉花品种,设置2种施氮方式,分别为常规全施尿素(T2)和缓释氮肥与尿素不同比例配施(US),配施处理按照施氮量设3个水平,分别为不减氮U0.8S0.2(T3)、U0.6S0.4(T4),减氮20% U0.6S0.2(T5)、U0.4S0.4(T6),减氮40% U0.4S0.2(T7)、U0.2S0.4(T8 ...
邱悦 +5 more
doaj +2 more sources
Shuitu Baochi Xuebao, 2021 通过采集2014年设置于甘肃省定西市李家堡镇的不同碳源配施氮素田间定位试验土壤进行120天的室内培养试验，利用Stanford间歇淋洗培养法研究了无碳素和氮素添加（N0）、只施氮素（N100）、秸秆配施氮素（SN100）和生物质炭配施氮素（BN100） 4种施肥方式对陇中黄土高原旱作农田土壤氮素矿化的影响。结果表明：秸秆和生物质炭配施氮素提升了表层土壤氮素矿化量，分别比只施氮素显著提升16.5%和15.4%；土壤氮素矿化呈现先快速增加而后迅速下降，降速逐渐转为慢速直至稳定的趋势，硝化速率 ...
王永栋 +5 more
doaj
Shuitu Baochi Xuebao, 2022 探讨减氮模式下氮肥不同基追比例对滴灌春小麦氮代谢关键酶活性、氮素积累转运、产量及氮肥利用率的影响, 为新疆麦区滴灌春小麦高效生产提供科学依据。以中筋型"新春6号"(XC 6)和强筋型"新春37号"(XC 37)小麦品种为材料, 设置0∶0, 2∶8, 3∶7, 4∶6, 5∶5共5种氮肥基追比处理, 研究氮肥基追比例对滴灌春小麦氮代谢及氮肥利用率的影响。结果表明: 同一品种下, 随氮肥基追比例的增加, 氮代谢酶活性、氮素积累、氮肥利用率(NUE)、籽粒产量及蛋白质产量均呈现先升高后降低的趋势 ...
王海琪 +4 more
doaj
Shuitu Baochi Xuebao, 2006 采用^15N-尿素进行盆栽和田间试验，研究了复合氮肥增效剂用量、尿素与复合氮肥增效剂配施对水稻生长、籽粒产量和氮素吸收利用的影响。结果表明，适宜用量（施氮量的20％）的复合氮肥增效剂能显著促进水稻幼苗生长发育；尿素全量配施复合氮肥增效剂不影响水稻生长，能显著提高水稻植株Ndff％、氮吸收总量，氮素利用率和^15N的吸收量,尿素减量5％～15％（即减少施氮7．8～23．7kg／hm^2）配施复合氮肥增效剂基本上不影响水稻生长、籽粒产量和吸氮总量，能显著提高氮素的农学效率、生理效率和氮素利用率；植株吸氮总量、
田秀英, 王正银
doaj +2 more sources
Metal‐Based Materials for Redox Modulation in Biomedicine
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Metal materials have become increasingly important in modulating biological redox networks for therapeutic and diagnostic purposes, owing to their distinctive electronic properties and adaptable reactivity. This review synthesizes recent developments across various metal‐based materials, including elemental metals, metal oxides, coordination ...
Yan Fan +7 more
wiley +1 more source
Organ‐specific ozone and nitrogen legacies strengthen substrate control over litter decomposition
Functional Ecology, Volume 40, Issue 8, Page 2548-2559, August 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Elevated tropospheric ozone (O3) and nitrogen (N) deposition are concurrent atmospheric changes that strongly influence terrestrial carbon cycling, yet their combined effects on below‐ground decomposition remain poorly understood.
Xiaofan Hou +8 more
wiley +1 more source
Functional Ecology, Volume 40, Issue 8, Page 2590-2601, August 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Permafrost thaw is reshaping nutrient dynamics in boreal forests, but its impacts on tree nutrient limitation and functional strategies remain poorly understood. Clarifying these responses is crucial for predicting the response of boreal forests to climate change.
Qiyue Fu +9 more
wiley +1 more source
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, 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
doaj +2 more sources