Results 61 to 70 of about 9,014 (169)
Spatial relationship between root system and soil properties of mature and densely planted Kuerlexiangli pear under long-term strip fertilization [PDF]
[Objective] Kuerlexiangli pear (Pyrus sinkiangensis Yü et Lu.) is the main cultivar in Southern Xinjiang. In recent years, the main trunk dense planting pear orchard has developed rapidly and entered the peak fruiting period.
AN Shijie +9 more
core +1 more source
Integrative Conservation, Volume 4, Issue 3, Page 503-513, September 2025.Fire occurrence increased with proximity to roads and villages, indicating that human access and activity are major drivers of fire risk. We analyzed spatial patterns of fire in relation to human settlements. Our findings highlight the need for fire management strategies that consider accessibility and human presence in conservation planning.
Aung Lin +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2007 土壤中的水分是影响半干旱区作物生长的重要因素,由于自身的特点决定了其在空间分布上存在着变异性。以黑龙江省西部半干旱农业气候区的查哈阳农场为研究对象,利用GS 地统计软件和ArcGIS中的地统计分析模块(Geostatistical Analyst),对该地区土壤水分特性的空间变异性进行分析,得出土壤水分特性的变异程度、影响因素以及空间分布图。借助于土壤水分特性的空间分布图对该地区的灌溉水量进行了分析,为该地区的合理灌溉和精确灌溉提供依据。
姜秋香, 付强, 王子龙
doaj +2 more sources
Shuitu Baochi Xuebao, 2020 研究黄土高原侵蚀环境下林地开垦后坡面土壤养分空间分布状况，确立林地开垦后侵蚀驱动的坡地土壤养分空间变异特征。以黄土高原丘陵区子午岭林地和开垦28年的侵蚀坡面为研究对象，分析土壤主要性质和养分含量的变化情况，运用经典统计学和地统计法分析坡面土壤基本性质和养分空间分布规律。林地开垦后坡面土壤pH增加了0.24个单位，有机质、全氮、全磷和铵态氮、硝态氮、速效磷和速效钾分别降低了13.77，1.14，0.10 g/kg和6.05，1.63，4.99，58.44 mg/kg。林地的土壤有机质 ...
王昭 +6 more
doaj
Study on Spatial Distribution of Urban Residential Land Prices Based on GIS Spatial Information Technology and Its Application——A Case Study in Xiamen City [PDF]
, 2011 土地是人类赖以生存的重要资源，土地市场是市场经济体系中最重要的基础性要素市场之一。随着我国土地使用制度的改革，土地产权的明确和市场流动，土地的资产属性日益得到重视和深化，带动了土地估价行业的发展，同时也对相应的评估理论研究和实务操作提出了越来越高的要求。随着计算机技术的日益完善，空间信息技术的发展，对城市地价的研究由定性过渡到定量成为可能，因此，土地价格的动态变化成为了研究的热点之一。 本文以厦门市住宅用地为例，采用统计分析和GIS空间技术相结合的方法，通过对1998年 ...
郑姗杉
core
Shuitu Baochi Xuebao, 2005 利用地统计学方法研究了我国西南丘陵区坡面土壤水分特性的空间变异。结果表明:西南丘陵区坡面土壤水分特性在不同的剖面深度具有一定的空间结构,可用纯块金效应模型、线性模型、指数模型和球状模型进行拟合;土壤水分特性变异为含水量>萎蔫含水量>田间持水量>饱和含水量>容重,变异系数都介于1%～100%之间,均属中等变异;水分特性随剖面深度表现出一定的变化规律,但半方差模型各参数随土壤深度无明显变化规律;土壤水库容为:有效水库容>通透库容>无效水库容,其空间分布主要受土层厚度和地形影响。
熊亚兰 魏朝富
doaj
EFFECT OF DIFFERENT BULKING AGENTS ON TRANSFORMATION OF NITROGEN DURING SEWAGE SLUDGE COMPOSTING [PDF]
, 2006 以稻草、木屑、树叶为填料,采用人工翻堆堆肥工艺,研究了4种填料组合下城市污泥堆肥过程中的温度变化及层次差异。结果表明,与填料的木质素含量有关,填料木质素含量低,堆体温度升高快,最高温度较高。堆肥过程中堆体各层次的温度均为中层高于上层和下层,堆肥初期,堆体上层温度低于下层,随后则高于下层,堆肥腐熟时3层温度趋于一致。以稻草等木质素含量低的物质作填料,堆体上层温度升高快,各层次最高温到达时间差异小,最高温相差大。Rice straw,sawdust and tree leaves were used as ...
李承碑, 贺亮, 赵秀兰
core
Experimental study on porous media penetration based on laser etching technology [PDF]
Permeability plays a pivotal role in water resources management, oil and gas exploration and production, as well as geological hazard assessment. Previous studies primarily explores the influencing factors of permeability through indirect methods, and ...
Huirong GUO +5 more
core +1 more source
贝叶斯共同成分模型拓展及其在高血压风险评估的应用 [PDF]
, 2019 尝试引入贝叶斯样条对贝叶斯共同成分模型进行拓展,并基于1991-2011年《中国健康与营养调查》的实际数据探究高血压风险的空间变异与时间变异。研究发现:高血压风险(尤其是男性)大致呈现出北方高于南方的空间格局,且这一空间分布模式具有相对稳定性,这可能与北方各省份相似且稳定的生活方式(饮酒、膳食高盐等)有关。拓展后的SCM模型更充分地挖掘样本信息,揭示出高血压风险的空间格局及其随时间演变的规律 ...
徐丽, 方亚
core +1 more source
Characteristics of Soil Saturated Hydraulic Conductivity and Its Influencing Factors at Different Landscape Positions in a Small Peak-Cluster Depression Watershed of the Karst Region [PDF]
[Objective] Peak-cluster depression is one of the important karst landform types. Exploring the influence of different landscape positions on soil saturated hydraulic conductivity (Ks) can provide a reference for further understanding of the hydrological
HOU Senzheng +5 more
core +1 more source