Results 11 to 20 of about 484,539 (156)
Shuitu Baochi Xuebao, 2022 以青岛市大沽河流域砂壤、河潮土、砂姜土3种农田土壤为研究对象,开展室内土柱试验,研究土壤pH、温度、含水率等理化性质与生物炭和氮肥配施对土壤有效磷(Olsen-P)和全磷(TP)淋失的影响,以期为提高农田土壤磷素有效性、减少全磷淋失提供参考依据。结果表明:3种土壤的pH在偏中性或弱碱性时磷素有效性最高,pH偏酸性时,土壤全磷淋失量较大;3种土壤不同土层中的Olsen-P含量随含水率的增加表现为不同的变化规律;3种土壤的磷素有效性均随温度的升高逐渐增大,全磷淋失量随温度的升高逐渐降低;生物炭和氮肥配施 ...
李利霞 +3 more
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Shuitu Baochi Xuebao, 2021 研究苗期干旱胁迫下施氮对东北春玉米氮素吸收利用和土壤生物化学性质的影响，为区域玉米养分管理与逆境调控提供依据。研究设置水、氮二因素盆栽试验，土壤水分包括3个水平：田间持水量的30%（W0），50%（W1）和70%（W2）；施氮量包括2个水平：不施氮（N0）和施氮0.24 g/kg（N1），测定不同水氮条件下玉米苗期的植株干重和氮素吸收、根际和非根际土壤的化学性质、微生物量碳、氮（MBC、MBN）及土壤酶活性。结果表明：干旱胁迫显著降低玉米苗期植株干重和氮素吸收量，其中W0条件降幅最大（分别为51.1 ...
朱琳 +7 more
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil salinization and alkalization often suppress microbial functional activity, triggering negative feedback loops in microbial metabolism, degrading nutrients and agricultural productivity.
Yuqi Chen, Lingying Xu, Xu Zhao
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Shuitu Baochi Xuebao, 2006 采用小粉土和青紫泥原状土柱种植青菜，研究了尿素添加DMPP（3．4-二甲基吡啶磷酸盐）硝化抑制剂对土壤氮素淋失的影响。结果表明．在60天内，与常规尿素相比，小粉土和青紫泥DMPP处理硝态氮的累积淋失量分别降低66．8％和69．4％，氨氮淋失量提高9．7％和6．7％，无机氮降低59．1％和63．0％；蔬菜收获后，土壤0～15cm层无机氮增高34．1％和28．2％，土壤中氮素纵向迁移降低。可见，DMPP抑制剂施入土壤具有显著的氨氧化抑制作用，延缓蔬菜地土壤氨氮向硝态氮的转化，减轻氮素向水体迁移的风险 ...
俞巧钢 +5 more
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Shuitu Baochi Xuebao, 2021 以山东茶园土壤为研究对象，采用室内好气培养法，分析了恒定湿润和干湿交替模式下土壤氮素转化特征。结果表明：（1）至培养结束时，恒湿模式下60%WHC处理土壤净矿化量和净硝化量较高；脲酶和亚硝酸还原酶活性较强。20%WHC处理下土壤净矿化速率、净硝化速率严重受到抑制。（2）干湿交替模式下复水后土壤净矿化量、净硝化量以及酶活性得到增强，并出现"脉冲"式变化。（3）2种模式下氮素损失均为N2O排放量大于NH3挥发量。N2O排放量与土壤含水量呈正比，NH3挥发量与土壤含水量呈反比 ...
于淑华 +3 more
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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
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Shuitu Baochi Xuebao, 2022 为探明盐渍化农田不同施氮水平下向日葵氮素吸收利用规律,采用15N同位素示踪技术进行田间微区试验,以不施氮处理(N0)为对照,设计3种施氮水平(N1=150 kg/hm2、N2=225 kg/hm2、N3=300 kg/hm2),于向日葵成熟期测定植株和0—100 cm土层土壤15N同位素丰度及总氮含量,研究各处理肥料氮素的去向及其利用机制。结果表明:向日葵氮素吸收量随施氮量的增加而增加,成熟期作物氮素吸收量在N2水平较不施氮显著增加38.7%;土壤氮和肥料氮对作物当季氮素吸收的贡献比例为84.9%和15.
乔天, 刘霞, 杨威, 高宏远
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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
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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
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Functional Ecology, Volume 40, Issue 7, Page 2128-2142, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil organic nitrogen (SON) transformation is critical for global nutrient cycling and ecosystem productivity, yet how its responsiveness to climate change differs across diverse land use types remains poorly resolved.
Xinyi Yang +10 more
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