搜索结果: 16-30 共查到“知识库 土壤学其他学科”相关记录247条 . 查询时间(2.109 秒)
云南省土壤侵蚀分布特征及动态变化
云南省 土壤侵蚀 水力侵蚀 土壤侵蚀分布
2021/8/13
掌握云南省土壤侵蚀分布特征和动态变化,是制定全省防治水土流失规划及措施体系的基础性工作。通过野外调查、资料收集、遥感影像解译等手段,在获取云南省降水、土壤、地形、植被、土地利用和水土保持措施现状等土壤侵蚀影响因子数据基础上,运用地理信息系统手段,利用中国土壤流失方程计算土壤侵蚀模数,分析云南省2015年的土壤侵蚀强度、面积和空间分布,对比分析10年来全省土壤侵蚀动态变化。结果表明,云南省土壤侵蚀以...
高山草甸土是青藏高原的主要土壤类型，其特征为土层薄、土壤发育微弱，但由于土壤具体的发育时代尚不明晰，限制了对草甸土成土过程和气候背景的理解。选取青海湖流域西南部的橡皮山顶草甸土两个剖面（XPSD1、XPSD2）和东南部的日月山垭口两个剖面（RYS1、RYS2）进行了光释光（Optically Stimulated Luminescence, OSL）年代学研究，系统分析草甸土中颗粒（38~63 μ...
Evaluation of field performance of BEST aeolian sediment catcher in sandy-loam soil of arid zone of Turkey
sediment trap trap efficiency wind erosion
2017/6/26
Field measurement of wind erosion is still a great challenge for researchers. In this study, field performance of a newly designed sediment trap BEST (Basaran and Erpul Sediment Trap) was evaluated fo...
为筛选适合陇东黄土高原石油污染土壤修复植物，选取当地“适生”植物金盏菊（Ｃａｌｅｎｄｕｌａ ｏｆ ｉｃｉｎａｌｉｓ）联合微生物菌剂开展了为期 ５ 个月
的原位修复实验．采用常规方法和 ＰＣＲ⁃ＤＧＧＥ 技术分析了修复过程中土壤理化性质、酶活性及土壤微生物群落遗传多样性等 １５ 项土壤环境因
子的动态变化情况及其对金盏菊生态修复的响应．结果表明，随着原位修复的进行，①土壤脲酶、多酚氧...
AN APPROACH TO QUANTIFY SEDIMENT YIELD IN VAST AREAS
Watershed Sediment Yield Index (SYI) Remote Sensing Technology
2015/8/17
Loss of fertile soil by erosion is undoubtedly much higher than weathering and soil formation. A
number of studies on estimation of sediment yield have been conducted and many such studies will be p...
喀斯特高原退化湿地草海土壤微生物群落碳源代谢活性研究
微生物群落 功能多样性 退化湿地 草海湿地
2015/8/10
为了揭示土壤微生物群落功能多样性对湿地退化过程的响应及其与环境因子的关系，采用 ＢＩＯＬＯＧ⁃ＥＣＯ 微平板法对喀斯特高原湿地草
海不同植被演替阶段根际土壤微生物的碳源代谢活性进行了研究．结果表明，沿湿地植被演替梯度，根际土壤微生物群落碳源代谢强度逐渐增
加，原生湿地竹叶眼子菜（Ｃｏｍｍ． Ｐｏｔａｍｏｇｅｔｏｎ ｍａｌａｉａｎｕ）根际土壤微生物碳源利用能力最低，碳源代谢类型单一；...
Numerical Analysis of Ponded Infiltration Experiment under Different Experimental Conditions
infiltration single-ring infiltrometer saturated hydraulic conductivity
2015/3/1
One of the most important properties, affecting the flow regime in the soil profile, is the topsoil
saturated hydraulic conductivity (Ks
).
The Effect of Fertilisation with Fermented Pig Slurry on the Quantitative and Qualitative Parameters of Tomatoes (Solanum lycopersicum)
tomato anaerobically fermented pig slurry
2015/3/1
The effect of fertilisation with fermented pig slurry on the quantitative and qualitative parameters of two
kinds of tomatoes was assessed by means of pot trials. These trials were carried out betwe...
The land degraded by industrial activity or natural elements is uninteresting for investors; consequently,
there have been no studies on the economic value of such land, in spite of its increasing a...
Evaluation of Functional Properties of Various Types of Vegetation Cover Using Remotely Sensed Data Analysis
vegetation cover energy fluxes surface temperature
2015/3/1
: The dissipation of solar energy and consequently the formation of the hydrological cycle are largely dependent on the structural and optical characteristics of the land surface. In our study, we sel...
Water storage in snow cover and runoff in experimental basins in the Jizerské hory Mountains
snow water equivalent (SWE) runoff coefficient snowmelt simulation of discharge
2015/2/4
The main aim of this work was to compare the results of the water storages obtained in the experimental basins in the Jizerské hory Mountains before the time of snowmelt with the total outflows, which...
The absorption of certain radicals by leaves in varying stages of decay, and the effect of leaves on the absorption of these radicals by a soil
Leaf-mold Soil absorption and adsorption
2015/1/26
The absorption of certain radicals by leaves in varying stages of decay, and the effect of leaves on the absorption of these radicals by a soil.
污染土壤中重金属的超声波强化EDTA洗脱及形态变化
污染土壤 重金属 超声波
2014/9/29
以EDTA为洗脱剂，对重金属污染土壤进行超声波强化洗脱正交实验，并用Tessier连续提取法研究了洗脱前后Cd、Cu、Pb、Zn的形态变化.结果表明，在EDTA 浓度20 mmol·L-1、固液比1：20、超声波作用时间16 min、超声波功率54%、洗脱次数4次的条件下，对4种重金属洗脱率最大，分别为：Cd 83.6%、Cu 58.8%、Pb 98.0%、Zn 43.0%.在实验所设浓度范围内，...
为研究不同植被恢复方式和施肥处理下土壤呼吸的季节变化的影响因素，对山西省孝义市露天矿区复垦区土壤呼吸、温度和水分进行了2年的野外观测，采用不同单双变量模型分析了土壤呼吸与温度、水分间的关系.结果表明，植被恢复方式和施肥处理及其交互作用均显著影响土壤基础呼吸速率（R10）和土壤温度敏感性指数（Q10）.在单变量模型分析中，百脉根和苜蓿草本恢复方式下，土壤呼吸与土壤温度间拟合水平较高，而油松林和混交林...