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Effects of highly volatile organochlorine solvents on nitrogen metabolism and microbial counts
microbial counts soil nitrogen cycle tetrachloroethylene 1,1,1-trichloroethane trichloroethylene
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2015/3/5
The effects of highly volatile organochlorine solvents (1,1,1-trichloroethane, TCET; trichloroethylene, TCE; and tetrachloroethylene, PCE) on soil nitrogen cycle and microbial counts were investigated...
土壤中苯肽胺酸的测定及淋溶特性研究
苯肽胺酸 土壤 超高效液相色谱-串联质谱 淋溶 残留
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2016/3/17
建立了反相条件下超高效液相色谱-串联质谱(UPLC-MS/MS)检测土壤中苯肽胺酸残留量的分析方法,并结合土壤薄层层析试验研究了苯肽胺酸在3种典型土壤(黑土、水稻土和红土)中的淋溶特性。结果表明:添加水平为0.1、1和10 mg/kg时,苯肽胺酸在土壤中的添加回收率为77.3%～99.4%,相对标准偏差(RSD)为1.3%～11.4%;其在3种土壤中的检出限(LOD)均低于1.0 μg/kg。苯肽...
The influence of heavy metals on soil biological and chemical properties
biological activities carbon enzymatic activities heavy metals metabolic quotient nitrogen respiration activity soil sulphur
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2015/3/2
Soil samples were collected at alluvial sites of the Litavka River, which flows through the Beroun and Příbram cities in Central Bohemia Region of the Czech Republic in 2005 and 2006. Higher heav...
Retention Curves of Soil from the Liz Experimental Catchment Obtained by three Methods
retention curve hydraulic properties numerical experiment
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2015/3/1
The retention curves were measured in the soil from the Liz experimental catchment (Šumava). The
sand table and pressure extractor methods were used to obtain a 13-point retention curve for und...
土壤微生物是否存在与植物和动物等大型生物相似或不同的地理分布格局，以及哪些历史和环境因素驱动着这种格局的存在是当前地学和微生物生态学研究的交叉热点课题之一。中国科学院东北地理与农业生态研究所农田分子生态学科组王光华团队在明确了东北黑土农田土壤细菌群落结构地理分布规律的基础上（Soil Biology & Biochemistry，2014, 70: 113-122），最近又采用高通量测序技术成功地...
Wheat genotyp es diff ering in alumin um tolerance differ in their growt h res ponse to CO2 enrichment in acid soils
Acid soils Aluminum tolerance elevated CO2 growth response malate efflux wheat ( Triticum aestivum L.)
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2015/2/5
Aluminum (Al) toxicity is a major factor limiting plant growth in acid soils. Elevated atmospheric CO2 [CO2] enhances plant growth. However, there is no report on the effect of elevated [CO2] on growt...
Degradation of seed mucilage by soil microflora promotes early seedling growth of a desert sand dune plant
Artemisia sphaerocephala adaptation moving sand dunes mucilage biodegradation plant–microbe interaction polysaccharide soil microbial community
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2015/2/5
In contrast to the extensive understanding of seed mucilage biosynthesis, much less is known a bout how mucilage is biodegraded and what role it plays in the soil where seeds germinate. We studied see...
The identification of aluminium-resistance genes provides opportunities for enhancing crop production on acid soils
Acid soils aluminium citrate malate resistance roots tolerance
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2015/2/5
Acid soils restrict plant production around the world. One of the major limitations to plant growth on acid soils is the prevalence of soluble aluminium (Al3+) ions which can inhibit root growth at mi...
The impact of windthrow and fire disturbances on selected soil properties in the Tatra National Park
windthrow wildfire spruce stands forest soil microbial activity
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2015/2/3
In November 2004, forest stands in the Tatra National Park (TANAP) were affected by windthrow and in July 2005, the wildfire broke out on a part of the affected area. The objective of this study is to...
Comparison of CGMS-WOFOST and HYDRUS-1D Simulation Results for One Cell of CGMS-GRID50
GRID50 capacity based model WOFOST Richards’ equation based model HYDRUS-1D Crop Growth Monitoring System (CGMS) soil profile water balance relative soil moisture
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2015/1/28
CGMS (Crop Growth Monitoring System) developed by JRC is an integrated system to monitor crop behaviour and quantitative crop yield forecast that operates on a European scale. To simulate water balanc...
秸秆覆盖条件下小麦生长季根系呼吸对土壤呼吸作用的贡献
秸秆覆盖 根系生物量外推法 小麦根系呼吸
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2014/12/20
在紫色土丘陵区连续6年进行秸秆覆盖试验的"旱三熟"农田系统中,于2012年12月—2013年4月小麦生长季内对土壤呼吸进行测定,并对小麦根系生物量、土壤温度、土壤水分和土壤有机碳含量等指标进行监测,以分析土壤呼吸动态变化的影响因素.结果表明,秸秆覆盖措施显著提高了土壤呼吸速率,秸秆覆盖(S)和秸秆覆盖+腐熟剂(SD)处理分别比对照(CK)增加了45.0%和29.4%.曲线估计表明,土壤呼吸作用与根...
苦皮滕素Ⅴ在土壤中的消解动态及降解产物
苦皮藤素V 消解动态 降解产物 土壤
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2016/3/17
为指导苦皮藤素制剂的科学合理使用,采用高效液相色谱-电喷雾多级串联质谱技术(HPLC-ESI-MS/MS)研究了苦皮藤素V在4种土壤中的消解动态及其降解产物。结果表明:苦皮藤素V在江西红土和陕西黄土中消解缓慢,90 d的消解率仅为68.0%和65.0%;在黑龙江黑土和天津碱土中消解相对较快,90 d时消解率分别为84.9%和95.1%。苦皮藤素V在4种土壤中的主要降解产物为一系列在其C-1、C-2...
采用106，107，108，109，101CFU.mL-15种浓度复合光合菌剂PS11灌根处理大豆幼苗，研究不同浓度复合光合菌剂PS11对大豆生理生化指标和土壤酶活性的影响。结果表明：与对照相比，106~109CFU.mL-1浓度的PS11可显著提高大豆幼苗光合色素含量,增强叶片的光合能力,增加生物量及根系活力，激活大豆幼苗抗氧化酶和土壤酶活性；随着菌液浓度的升高，PS11对大豆的促生效果及对土壤...
The effect of crop sequences on soil microbial, chemical and physical indicators and its relationship with soybean sudden death syndrome (complex of Fusarium species)
physical variables soybean sudden death syndrome
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2014/10/23
The effect of crop sequences on soil quality indicators and its relationship with sudden death syndrome (SDS, a complex of Fusarium species) was evaluated by physical, chemical, biochemical and molecu...