Results 21 to 30 of about 1,067 (167)

不同水分模式对山东茶园土壤氮素动态的影响

open access: yesShuitu 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
doaj  

Research Progress of Nitrogen Leaching in Farmland Soil [PDF]

open access: yes, 2014
对农田土壤氮素淋失的相关研究进行综述和总结是研究农业面源氮素污染的一个至关重要的前提。本文从土壤氮素渗漏淋失形态和迁移机理、氮素渗漏淋失的研究方法和影响土壤氮素渗漏淋失的因素三方面进行了详细的分析介绍,概述了近年来国内外农田氮素渗漏淋失的研究进展和研究成果,并在此基础上展望了未来氮素淋失研究工作的重点。研究结论对农田土壤的水肥管理措施及浅层地下水硝氮污染的减缓有一定的理论和借鉴意义Reviewing and summarizing the related research of farmland ...
朱木兰, 李青松, 王吉苹
core  

Factors influencing fine roots decomposition rates in response to nitrogen addition vary across root characteristics

open access: yesFunctional Ecology, Volume 39, Issue 12, Page 3504-3516, December 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Nitrogen (N) deposition strongly affects litter decomposition and nutrient release, thereby reshaping carbon cycling in terrestrial ecosystems. Although most studies have focused on above‐ground litter, the effects of N addition on fine root decomposition and their ...
Yuneng Wang   +5 more
wiley   +1 more source

Nitrogen‐transforming microorganisms potentially facilitate the invasion of Moso bamboo (Phyllostachys edulis) into evergreen broadleaf forests

open access: yesFunctional Ecology, Volume 39, Issue 10, Page 2704-2716, October 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Moso bamboo (Phyllostachys edulis) invasions into broadleaf forests can cause serious ecological problems, such as reducing biodiversity and disrupting community succession.
Ting Zhou   +5 more
wiley   +1 more source

Simulation on Soil Carbon, Nitrogen Cycles and Output Characteristics at Banana Fields, Southeast China [PDF]

open access: yes, 2011
土壤C、N循环是农业生态系统最基本的生态过程,了解土壤C、N循环是研究陆地生态系统C、N循环的重要前提。本文以南靖县五川流域的一个小流域为研究区域,选取施肥量高、面积大的种植香蕉土地利用类型为例,采取模型模拟的方法,应用NCSWAP模型模拟了较长时间尺度下(1998~2007年)土壤C、N各种循环过程及输出特征,对可能影响C、N循环的管理措施因素进行情景模拟分析,最后对农业生产和管理环节提出建设性的措施,取得了如下研究成果: (1)对种植香蕉土壤的NO3--N和SOC含量季节性变化进行了验证 ...
黄虹
core  

Tree mycorrhizal associations regulate relationships between plant and microbial communities and soil organic carbon stocks at local scales in a temperate forest

open access: yesFunctional Ecology, Volume 39, Issue 6, Page 1550-1566, June 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests store substantial amounts of soil organic carbon (SOC), but SOC stocks differ strongly between forest ecosystems dominated by arbuscular mycorrhizal (AM) or ectomycorrhizal (EcM) fungi.
Mengxu Zhang   +10 more
wiley   +1 more source

黄土区几种土壤培养过程中可溶性有机氮的变化及其与土壤矿化氮的关系

open access: yesShuitu Baochi Xuebao, 2008
研究了黄土高原12种土壤(农地和林地)35 d好气培养过程中可溶性有机氮(SON)含量及其占可溶性全氮(TSN)的比例,以及SON与土壤矿化氮间的关系。结果表明,随着培养过程的进行,不同类型土壤SON的含量均呈明显增加;土壤SON占TSN的比例在培养的前3 d内明显下降,随后这一比例基本保持在24%左右。根据总可溶性氮确定的供试土壤氮素矿化势No平均为45.8 mg/kg,较由矿化的无机氮确定的土壤氮素矿化势No(平均36.5 mg/kg)高约1/4左右 ...
赵满兴, Kalbitz, Karsten, 周建斌
doaj  

Study on soil denitrification in an agricultural catchment in southeasten area of Fujian province [PDF]

open access: yes, 2007
反硝化是一个重要的生物化学过程,是氮生物地球化学循环的重要环节。在维持流域、乃至全球氮素平衡方面发挥着重要作用。土壤反硝化的中间产物之一的N2O气体,是一种温室气体,对大气臭氧层具有较大的破坏作用。另外,反硝化还影响其他重要的生物地球化学过程。因此,反硝化研究具有重要的现实意义。 随着经济的高速发展、自然资源的不断消耗和生态环境的不断恶化,全球环境问题日益突出,温室效应已十分明显。作为温室气体之一的N2O对全球气候变化有着重要的影响。目前,有关N2O的研究已成为温室效应与全球气候变化研究的焦点之一 ...
徐玉裕
core  

Plant–microbe interactions drive the rhizosphere microbial assembly and nitrogen cycling in a subtropical forest

open access: yesFunctional Ecology, Volume 39, Issue 5, Page 1274-1287, May 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Interactions between plants and soil microorganisms in the rhizosphere are vital for maintaining the nutrient cycle and stability of terrestrial ecosystems. Nitrogen, closely related to carbon (C) cycling and ecosystem productivity, undergoes transformation by soil ...
Ru Wang   +9 more
wiley   +1 more source

施氮量对冬小麦—夏玉米土壤氮素表观盈亏的影响

open access: yesShuitu Baochi Xuebao, 2018
通过河北清苑连续6年的田间定位试验,以冬小麦—夏玉米轮作体系作为对象,设置不同的施氮处理(N0、N100、N180、N255、N330),研究不同施氮量对冬小麦—夏玉米轮作体系的土壤氮素表观盈亏的影响。结果表明:6年土壤表观氮素累积盈亏量随施氮量的增加而增加,N0和N100处理的土壤氮素累积盈亏量为负值,N180、N255和N330处理的土壤氮素累积盈亏量分别高达382,1 173,2 116 kg/hm2;各处理的氮素表观盈亏量年际间变异较大,而在2种作物上的氮素累积盈亏量差异不大 ...
辛思颖   +5 more
doaj  

Home - About - Disclaimer - Privacy