通过盆栽试验研究了土壤增施γ-PGA(0.1%,0.2%,0.3%,0.4%)对土壤团聚结构、土壤养分平衡、菠菜产量与经济效益的影响。结果表明:随γ-PGA施量增加,水稳性团聚体(WR0.25)、平均重量直径(MWD)和几何平均直径(GMD)均显著增大,而团聚体破坏率(PAD)与分形维数(D)均减小,说明γ-PGA对改善土壤团聚结构具有显著的效果;随γ-PGA施量的增加,菠菜对氮、磷、钾的吸收量减少,土壤养分残留量与盈余量增加,养分表观损失量减小;5组处理中,0.1%施量的土壤养分平衡状况最优,0.4 ...
刘乐 +4 more
doaj
[Application of Droplet-Based Microfluidics in Microbial Research]. [PDF]
Li ZY, Peng X.
europepmc +1 more source
[Rapid and simultaneous determination of glyphosate, glufosinate, and their metabolites in soil by high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Ping H +6 more
europepmc +1 more source
A case of Elizabethkingia meningoseptica septicemia. [PDF]
Wu L, Ye T, Pan X, Hong L, Shi Y.
europepmc +1 more source
[Research progress on interference in the identification of accelerants in a fire scene]. [PDF]
Yin G +5 more
europepmc +1 more source
Diagnosis and treatment for a case of Legionella longbeachae severe pneumonia and literature review. [PDF]
Feng S, Luo P, Huang S, Ou Z.
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以山西省临汾市不同种植年限的蔬菜日光温室土壤为研究对象,分析了土壤有机质、碱解氮、硝态氮、速效磷、速效钾等养分指标的累积状况以及温室土壤电导率、可溶性盐、pH值的变化情况。结果表明,与大田土壤相比,温室土壤电导率和可溶性盐含量逐年增加,pH值下降,种植8a的日光温室土壤盐分累积量已接近黄瓜的生育障碍临界点;土壤养分均有不同程度的累积,尤其是土壤速效磷、硝态氮的累积严重;日光温室特殊的环境条件以及过量施用化肥是土壤盐分累积和养分富集的主要原因。
杜新民 +3 more
doaj
为探究不同覆盖措施对养分流失及其粒径分布的影响,采用人工模拟降雨试验的方法,模拟了不同雨强(30,60 mm/h)和不同覆盖物(枯落物、砾石)下,不同覆盖度对褐土坡面养分流失的影响,并对侵蚀土壤的粒径分布、养分流失浓度进行了分析。研究表明:(1)覆盖措施能够有效减少土壤流失,250 g/m2的枯落物和盖度为50%的砾石覆盖可减少91%~98%和68%~91%的土壤流失。(2)褐土坡面下,被侵蚀土壤中有机质、速效氮、速效磷的浓度基本不随覆盖条件的变化而变化 ...
李瀚之 +5 more
doaj
[Determination of 26 herbicide residues in soil, sediment, and surface water samples using modified QuEChERS method combined with ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Zhao L, Ma L, Huang LQ, Chen JB, Zhu WF.
europepmc +1 more source
[Evaluation of Gradient-Variant Quantum Dot Fluorescence Technology for Rapid Detection of <i>Brucella</i>]. [PDF]
Li J +9 more
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