搜索结果: 121-135 共查到“知识库 土壤学其他学科”相关记录242条 . 查询时间(0.848 秒)
酸铝胁迫下4个速生桉优良无性系的生长反应
酸铝胁迫 生长 无性系 桉树
2012/3/26
采用砂土培育法研究不同的酸铝处理对几种桉树优良无性系（巨尾桉9号、巨尾桉12号、尾叶桉4号、韦赤桉3号）幼苗生长及膜透性等变化的影响。试验设: pH 3.0＋0 mg/L Al3+、 pH 3.0＋120 mg/L Al3+、 pH 4.0＋0 mg/L Al3+、 pH 4.0＋120 mg/L Al3+、 pH 4.8＋0 mg/L Al3+5个处理。结果表明，不同酸铝处理对4个桉树优良无性系...
Role of Some Effective Microorganisms in Improving Soil Properties and Productivity of Peanut under North Sinai Conditions
Microorganisms sandy soil Pea nut Bacillus Pseudomonas Streptomyces fulvissium
2010/11/15
About 77 different microbial isolates (24 Azotobacter, 14 Bacillus, 9 Pseudomonas, 14
Actinomycetes and16 Fungi), isolated from different plant rhizosphere and compost from different localities in Eg...
Distribution of natural radionuclides in anthrosol-type soil
Distribution of natural radionuclides anthrosol-type soil
2010/10/29
Taking into account the importance of distribution and transfer of radionuclides in the soil-water-plant system, especially in agricultural fields, in this study, natural radionuclide determination in...
Pathogen reduction effects of solar drying and soil application in sewage sludge
Ascaris faecal coliforms Salmonella sewage sludge soil solar drying
2010/10/29
The responses of sludge faecal coliforms, Salmonella, and Ascaris lumbricoides to heat drying, solar dehydration, and inactivation in soil are examined in this study. The presence of Salmonella in raw...
Parametric modeling of root length density and root water uptake in unsaturated soil
Modeling optimization root distribution TDR water flow
2010/10/29
The problem of water movement through the root zone has attracted increasing interest during the last few decades. In this research, the spatial and temporal pattern of root water uptake in wetted soi...
Estimation of surface soil moisture and roughness from multi-angular ASAR imagery in the Watershed Allied Telemetry Experimental Research (WATER)
Estimation surface soil moisture roughness multi-angular ASAR imagery Watershed Allied Telemetry Experimental Research
2013/9/2
Radar remote sensing has demonstrated its applicability to the retrieval of basin-scale soil moisture. The mechanism of radar backscattering from soils is complicated and strongly influenced by surfac...
湖州市不同土地利用类型土壤中多环芳烃的分布及来源
土壤 多环芳烃 土地利用类型 湖州
2014/6/12
通过对湖州地区74个土壤样品多环芳烃含量的测定,分析了湖州市不同土地利用类型土壤中多环芳烃的含量特征及污染水平。结果表明,湖州市区耕地中多环芳烃的含量最高;从低环/高环比值小于1以及芘/苯并(a)芘比值小于2,反映了湖州地区土壤中多环芳烃主要是由燃煤和生活污染所产生的。
A new soil freeze/thaw discriminant algorithm using AMSR-E passive microwave imagery
soil freeze/thaw status microwave radiometer discrimination analysis AMSR-E
2013/9/2
The soil freeze–thaw controls the hydrological and carbon cycling and thus affects water and energy exchanges at land surface. This article reported a newly developed algorithm for distinguishing the ...
金属铝对蚯蚓急性毒性的研究
铝 蚯蚓 急性毒性
2010/2/23
金属铝对植物具有高细胞毒性，但其对中性土壤中无脊椎动物的生态毒理研究极少。本论文采用国际标准组织(ISO)和OECD（207）指南中的滤纸接触法和人工土壤法，测定金属铝对蚯蚓的急性毒性。试验结果显示铝对蚯蚓具有较高的毒性。滤纸接触法半数致死浓度（LC50）为20－200 mg Al /l；人工土壤法LC50为518.20 mg Al /kg干土。在滤纸接触法试验中，金属铝对蚯蚓的急性毒性高于重金属...
沙尘暴的发生与沙尘暴源地的下垫面状况密不可分,下垫面要素中土壤紧实度等地表状况指标是沙尘暴灾害下垫面因子的危险度研究的重要内容。选取沙尘暴源地的内蒙古中西部地区为研究区域,于2004年4月进行了土壤紧实度实地采样,对获取的36个采样点的数据进行了统计分析,发现在不同的植被覆盖类型下,地表的土壤紧实度值具有明显的分异特征和分布范围。以1:10万的内蒙古土地利用类型图为依托进行重分类,对研究区域的土壤...
北京地区公路两侧土壤pH分布情况调查
土壤 pH 酸性降水 土壤酸化
2010/2/22
为掌握北京公路两侧土壤pH分布特征，测定了北京5条公路两侧124个采样点土壤的pH。结果显示，八达岭高速路、京石高速公路以及京开高速路两侧土壤pH贴近背景值，无明显酸化迹象，而京通快速路以及机场高速路两侧土壤略低于背景值，出现某种程度的酸化趋势。分析了酸性降水对土壤pH变化的影响，并提出防止土壤酸化的建议。
Vermicompost as a soil supplement to improve growth and yield of Amaranthus species
Organic waste vermicompost growth physical parameters biochemical parameters
2010/11/15
The present study aims at assessing the efficacy of vermicompost produced from organic waste
over chemical fertilizer by applying it to Amaranthus species. Estimation of vermicompost composition reve...
宁夏枸杞产区土壤中有机磷农药残留现状分析
茨园 土壤 有机磷农药 残留
2010/2/21
对宁夏主要枸杞产区中宁县土壤样品中的5种近年常用有机磷农药的残留量进行了检测和分析。结果表明：5种有机磷农药中毒死蜱的检出率达41.67%，检出残留量均大于等于12μg/kg,最大残留量为54μg/kg；对硫磷的检出率为8.33%，其余三种有机磷农药均未检出。枸杞产区土壤中有机磷农药残留对枸杞安全生产和人体健康存在潜在威胁。对比可知，不同土壤类型的土样中农药残留量无差异。
粘土矿物修复重金属污染土壤的研究进展
土壤 粘土矿物 重金属污染 修复
2010/2/21
粘土矿物修复重金属污染土壤是一种原位修复技术，该技术通过向污染土壤中添加粘土矿物，利用粘土矿物对重金属的吸附、配合、共沉淀等作用降低重金属的移动性和生物有效性，减少重金属向水体和植物及其它环境单元的迁移，从而实现了重金属污染土壤的化学修复。由于粘土矿物资源丰富、修复过程操作简单、修复效果迅速，使其在重金属污染土壤的治理过程中有着不可替代的作用。本文对粘土矿物修复重金属污染土壤的机理进行了探讨，总结...