旨在明确深松和秸秆覆盖2种措施在紫色土坡耕地中的水分养分流失特征规律,利用径流小区,结合平作、垄作、深松、完整秸秆覆盖和粉碎秸秆覆盖措施共设置9个试验处理,开展了2年的田间试验,对产量、地表径流、壤中流以及径流中的养分流失进行了测定。结果表明:(1)与平作相比,深松可显著增加壤中流量和壤中流中的总氮浓度,增加39.6%的总径流,以及85%的总氮量流失,同时还会降低玉米产量。(2)秸秆覆盖降低地表径流,增加壤中流量和壤中流中的总氮浓度,总径流增加6.4%,总氮量流失增加9.4%,秸秆覆盖对产量无显著影响。(
刘海涛 +6 more
doaj
以三峡库区王家桥小流域林地、耕地和园地为研究对象,结合染色示踪技术,利用图像处理软件技术,通过计算优先流形态特征参数,分析3种土地利用类型下高砾石含量紫色土的优先流形态发育特征。结果表明:砾石平均含量表现为园地>林地>耕地,土壤大孔隙平均半径随着深度的增加而减小。林地优先流运动深度可达60 cm,剖面染色区域呈现明显的不规则性,耕地染色深度集中在0—15 cm土层,染色区域分布均匀,但染色面积小,且存在大量的侧向流,园地染色范围广,优先路径连通性好。染色路径数表现为园地>林地>耕地 ...
戴翠婷 +4 more
doaj
[Low-oxygen-affinity hemoglobinopathy Hemoglobin Sunshine Seth: a case report and literature review]. [PDF]
Chang L +4 more
europepmc +1 more source
以紫色土为研究对象,通过室内重塑土试验,采用多元回归方程和曲面响应等分析方法,研究容重和含水率对紫色土崩解特性的影响。结果表明:(1)在相同容重下,崩解量随着含水率的增加而减小,不同含水率的土样崩解时间有所不同;土样完全崩解时间总体上随着含水率的增加而延长,且崩解量主要集中在崩解阶段前3 min。(2)在相同含水率下,崩解量随着容重的增加而减小,土样完全崩解时间总体上随容重的增大而延长,且崩解量主要集中在前4 min。(3)在相同容重和含水率下,土样崩解速率均随着容重和含水率的增大而减小;较之容重 ...
李敬王, 陈林, 史东梅, 张佳宝
doaj
[Research progress on paper-based microfluidic chips in pathogen detection]. [PDF]
Liu XT, Shi J, Shi M.
europepmc +1 more source
[Determination of 12 typical personal care products in human urine samples by ultra performance liquid chromatography-tandem mass spectrometry]. [PDF]
Han LX +6 more
europepmc +1 more source
[Layered double hydroxide-loaded si-NEAT1 regulates paclitaxel resistance and tumor-associated macrophage polarization in breast cancer by targeting miR-133b/PD-L1]. [PDF]
Zhang Z +8 more
europepmc +1 more source
[Research progress in material preparation and application of magnetism-enhanced in-tube solid-phase microextraction]. [PDF]
Luo YN +7 more
europepmc +1 more source
[Simultaneous determination of saturated and aromatic hydrocarbons in soil by on-line high performance liquid chromatography-gas chromatography]. [PDF]
Liu L, Li B, Wu Y.
europepmc +1 more source
[Efficient separation of gossypol from cotton kernels with copper mediated magnetic molecularly imprinted polymer]. [PDF]
Yang SL +5 more
europepmc +1 more source

