Shuitu Baochi Xuebao, 2023 为探究三峡库区2种土地利用方式下土壤交换性盐基离子及土壤碳氮含量对氮添加的响应,以湖北省秭归县的林地和果园土壤为研究对象,进行室内土柱淋溶模拟试验,研究4种不同氮添加量(0,50,120,200 kg/(hm2·a))下,土壤中交换性Ca2+、Mg2+、Na+、K+以及NO3--N、DOC的变化。结果表明:随着氮添加量的增加,林地土壤中的交换性盐基离子淋失量显著增加 ...
郑志杰 +8 more
doaj
Effects of Heterotrophic Ammonia-oxidizing Bacteria on Yield and Water Use Efficiency of Dryland Maize [PDF]
[Objective] To investigate the effects of inoculating heterotrophic ammonia-oxidizing bacteria (HAOB) on yield and water use efficiency of dryland maize. [Methods] A two-year field experiment was conducted in a drought-prone area using HAOB strain S2_8_1
CAO Jiawei +5 more
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[Determination of organophosphate diesters in facility vegetable soils using ultra-high performance liquid chromatography-electrostatic field orbitrap high resolution mass spectrometry]. [PDF]
Se Pu, 2023 Liu M +7 more
europepmc +1 more source
Analysis of differences in physicochemical properties and bacterial community characteristics of rhizosphere soil in apple orchards under different cover treatments [PDF]
[Objective] Cover cropping is a widely adopted soil management technique used in fruit tree cultivation. By planting specific vegetation to cover the ground, this practice significantly influences nutrient cycling, microbial activity, and biodiversity ...
CAI Rongjing +10 more
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[Determination of polychlorinated naphthalenes in soil using accelerated solvent extraction-molecular sieves solid-phase extraction coupled with gas chromatography-tandem mass spectrometry]. [PDF]
Se Pu, 2022 Jin J +6 more
europepmc +1 more source
On soil organic matter dynamics in species-diverse grasslands and intercrop systems [PDF]
, 2014 Door menselijk handelen (verandering in van natuurlijke vegetatie naar landbouw) is de organische C voorraad in de bodem met 10-59% afgenomen, afhankelijk van de landgebruiksverandering.
Cong, W.
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Shuitu Baochi Xuebao, 2019 为研究河套灌区盐碱农田不同施氮量在冻融作用后对翌年春播前土壤肥力的影响效应，结合翌年土壤肥力状况确定当地适宜的施氮量。采用田间试验的方法，共设置4个施氮水平（高氮N3：325 kg/hm2；中氮N2：225 kg/hm2；低氮N1：125 kg/hm2；不施氮N0）研究冻融期内水盐时空分布、全氮、碱解氮以及有机质含量的变化规律，并采用主成分分析法对翌年春播前土壤肥力进行综合评价。结果表明：（1）秋浇后，土壤含水率显著高于秋浇前，表层土壤含水率增加，开始冻结时，水分向表层积聚 ...
王美荣 +5 more
doaj
氮添加和凋落物增减对华西雨屏区常绿阔叶林土壤团聚体及其碳氮的影响
Shuitu Baochi Xuebao, 2022 大气氮沉降可通过改变土壤氮素可利用性(直接影响)和改变凋落物输入量(间接影响)对森林土壤碳氮动态产生影响。土壤团聚体是森林表层土壤最具代表性的基本结构单元, 对于稳定贮存有机碳氮具有重要意义。通过氮添加和凋落物增减试验设计, 探索氮添加和凋落物增减对土壤团聚体及其碳氮组分的影响。结果表明: (1)凋落物增加(+L)和减少(-L)都使A层土壤(0-10 cm)以及各粒径团聚体的TOC(有机碳)、TN(全氮)含量显著提高, 使pH显著降低。氮添加使B层土壤(10-30 cm)pH显著降低, 表现为高氮(HN)
吕思扬 +5 more
doaj
Urban Soil and Its Relationship to Landscape Planting [PDF]
, 2003 城市土壤是影响城市绿化植物生长的重要环境因子。从城市土壤的物理化学特征如结构、土壤容重和紧实度、城市土壤的水分供应、土壤有机质与养分含量、土壤酸碱度、土壤次生盐渍化和盐基饱和度等角度讨论了城市土壤与城市绿化植物生长之间的关系。城市绿化应该从土壤抓起。Soil is one important factor influencing the growth of plant species in the urban.
林鹏, 王文卿, 王良睦
core
Field Studies on Intrastream Nitrification in an Agricultural Headwater Catchment, South Fujian Province [PDF]
, 2008 人类活动对地球系统的影响迅速扩大，过量的施肥、化石燃料等人类活动带来的氮负荷问题日益严重。陆地和水生态系统的氮素饱和后，过量的氮素通过地表径流和地下径流排入溪流、湖泊、河流和海洋中。溪流直接迁移了流域系统过多的氮素，溪流内部是否存在活泼的生物地球化学作用存在着争议。目前，国外一些地区的研究显示溪流内部的硝化作用对水生态系统中NO3-核算有重要影响。相对于国外研究区域，中国农业源头流域有不同土地利用、流域地形、水文等情况，有必要结合当地的流域特征进行研究。五川流域的氮素循环已经进行了长期的定位研究 ...
王巧稚
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