Results 31 to 40 of about 2,938 (148)
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Cost‐effective and efficient non‐noble‐metal catalysts for selective lignin hydrogenolysis remain elusive, representing a significant challenge in biorefinery. Here, we prepared a nitrogen‐doped carbon supported CoNi bimetallic catalyst, which was successfully derived from zeolitic imidazolate framework (ZIF) via high‐temperature pyrolysis ...
Xingwei Luo +3 more
wiley +1 more source
P relim inary resu lts concern ing th e spa tio2tempora l pa ttern and mechan ism of n itrogen sources and expor ts in th e J iu long R iver wa tersh ed [PDF]
, 2009 [摘要]：综合运用定位监测、野外试验、模型模拟与G IS技术等手段和方法, 定量研究了南亚热带地区九龙江流域和五川小流域氮的大气沉降、河 流输送(地表径流)、淋失、反硝化和氨挥发等输入输出(源汇)时空模式与机理. 结果表明, 九龙江流域氮/ 源0以化肥与饲料输入为主(占总输 入125. 6kg# hm- 2的86% ), 氮/ 汇0以氨挥发和河流输送为主(占总输出72. 9kg# hm- 2的82% ). 氮输入后50%以上进入大气和水环境, 14.
CHEN Nengwang +5 more
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Effects of nitrogen application time on fruit setting rate and lignin accumulation during sepal development of Kuerlexiangli pear [PDF]
[Objective] Sepal shedding of Kuerlexiangli pear (Pyrus brestschneideri Rehd.) is a key factor in determining fruit quality and economic value. Nitrogen is an essential element for the growth of fruit trees, and has a profound influence on the growth and
BAO Jianping +4 more
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High nitrogen enrichment buffers plant photosynthesis against herbivory damage
Functional Ecology, Volume 40, Issue 1, Page 229-238, January 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Herbivorous insects and nitrogen deposition are key drivers of ecosystem productivity under global change. However, their combined effects on plant photosynthesis, particularly during insect outbreaks, remain poorly understood in natural ecosystems.
Yongqiang Zhang +6 more
wiley +1 more source
Nitrogen mineralization and denitrification in bamboo riparian systems in Southeastern China [PDF]
, 2011 采用原位培养法和乙炔抑制-静态土柱培养法,对南方丘陵地区竹林河岸系统的矿化、反硝化作用进行了研究.结果表明,研究区土壤氮矿化速率为-0.28~0.30Mg·kg-1·d-1(以n计,下同),且与土壤含水量存在显著正相关(P河岸入口>河岸中部,并呈现出较大的时空差异.硝化和反硝化过程存在较强的耦合作用.较河岸区入口处和中部区而言,毗邻河道的河岸区的生物地球化学过程更为活跃.In situ nitrogen mineralization and denitrification rates in top ...
方婧, 曹文志, 苏彩霞
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Progress in Research on the Long Non-coding RNAs in Chinese Cabbage [PDF]
Long non-coding RNAs (lncRNAs) are functional non-coding RNA molecules that are at least 200 nucleotides in length and lack significant coding ability, having important regulation effects on plant growth and development and response to stress.
Min HAN, Ruihua WANG, Yuanyuan LI
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Trait‐Mediated Competition for Light Underpins Plant Diversity Loss Under Eutrophication
Global Change Biology, Volume 31, Issue 9, September 2025.Eutrophication often reduces plant diversity by making the ground layer darker, which reduces understory plants. In a natural alpine grassland, we added LED light beneath the canopy and saw diversity return across different nutrient treatments: with added nitrogen fertilizer, light mainly increased new species; with added phosphorus fertilizer, it ...
Tianyuan Tan +7 more
wiley +1 more source
Shuitu Baochi Xuebao, 2007 不同施氮措施条件下，对保护地黄瓜生育期内氮素吸收利用效率、氮素淋洗损失进行了研究，同时也研究了不同处理对黄瓜产量及品质的影响。试验结果表明，传统施肥处理（2100kg／hm^2）与推荐施肥处理（900kg／hm^2）之间氮素吸收量没有显著差异，传统施肥处理中大量的氮肥没有用于促进黄瓜对养分的吸收利用，其氮肥利用率、农学利用率以及生理利用率都很低，每千克纯氮增产只有2．06kg，91．65％的氮素以各种途径被损失掉，其中土壤硝态氮淋洗是主要形式。同时研究发现，传统施肥处理过量氮肥施用阻碍其它营养元素的吸收，
杨治平, 陈明昌, 张强, 张建杰
doaj +2 more sources
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
脲酶/硝化抑制剂对沿淮平原水稻产量、氮肥利用率及稻田氮素的影响
Shuitu Baochi Xuebao, 2019 添加氮素抑制剂是提高水稻氮肥利用率的有效途径之一。采用大田试验，探讨了氮素抑制剂（脲酶抑制剂N-丁基硫代磷酰三胺（NBPT）、硝化抑制剂3，4-二甲基吡唑磷酸盐（DMPP）及其组合）对沿淮平原水稻产量、氮肥利用率及稻田氮素的影响，旨在为优化沿淮稻田生态系统氮素养分管理，减少氮素损失提供科学依据。以"常糯1号"为供试材料，于2018年6-10月在安徽省怀远县（沿淮平原典型水稻种植区）进行试验。试验设5个处理：不施氮肥（CK）；尿素（U）；尿素+硝化抑制剂（U+DMPP）；尿素+脲酶抑制剂（U+NBPT ...
王静 +7 more
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