نتایج جستجو برای: soil microbial biomass

تعداد نتایج: 331718  

2017
Eva Pose-Juan José M. Igual María J. Sánchez-Martín M. S. Rodríguez-Cruz

The effect of organic amendments and pesticides on a soil microbial community has garnered considerable interest due to the involvement of microorganisms in numerous soil conservation and maintenance reactions. The aim of this work was to assess the influence on a soil microbial community of the simultaneous application of the herbicide triasulfuron at three doses (2, 10, and 50 mg kg-1), with ...

2013
Alan L. Wright Miguel S. Castillo

Land use changes in the Everglades Agricultural Area (EAA) of south Florida may alter microbial activity and organic matter decomposition and ultimately influence the fate of P in soil. The objectives of this study were to determine effects of long-term cultivation and fertilization on microbial activity and P dynamics for contrasting land uses in the EAA. Soils (0-15 cm) under pasture for 100 ...

2016
Mengxin Zhao Bo Sun Linwei Wu Qun Gao Feng Wang Chongqing Wen Mengmeng Wang Yuting Liang Lauren Hale Jizhong Zhou Yunfeng Yang

Soil types heavily influence ecological dynamics. It remains controversial to what extent soil types shape microbial responses to land management changes, largely due to lack of in-depth comparison across various soil types. Here, we collected samples from three major zonal soil types spanning from cold temperate to subtropical climate zones. We examined bacterial and fungal community structure...

2016
Beata Klimek Anna Sitarz Maciej Choczyński Maria Niklińska

Various inorganic and organic pollutants in industrial soils may adversely affect soil microorganisms and terrestrial ecosystem functioning. The aim of the study was to explore the relationship between the microbial activity, microbial biomass, and functional diversity of soil bacteria and the metals and total petroleum hydrocarbons (TPHs) in the Upper Silesian Industrial Region (Poland). We co...

Journal: :تحقیقات آب و خاک ایران 0
مهدی باهمت کارشناسی ارشد، پردیس کشاورزی و منابع طبیعی محسن فرحبخش استادیار، پردیس کشاورزی و منابع طبیعی احمدعلی پوربابایی استادیار، پردیس کشاورزی و منابع طبیعی غلامرضا ثواقبی دانشیار، پردیس کشاورزی و منابع طبیعی

use of electrokinetic technique for remediation of contaminated soils has recently been highly attended to, but there are still concerns regarding the effect of this process on soil microbial activity. in this study, changes in concentration of heavy metals extractable through 4n nitric acid, microbial biomass-c, and microbial coefficient, following electrokinetic remediation of a native soil c...

ژورنال: علوم آب و خاک 2017

The use of organic matter such as urban sewage sludge may help sustainable soil fertility via improving the physical, chemical and biological soil characteristics. The main purpose of this study was to determine the effect of urban sewage sludge on chemical properties, soil basal respiration and microbial biomass carbon in a calcareous soil with silty clay loam texture. Therefore, three levels ...

2008
S. D. Frey R. Drijber H. Smith J. Melillo

We examined the effect of chronic soil warming on microbial biomass, functional capacity, and community structure in soil samples collected from the Soil Warming Study located at the Harvard Forest Long-term Ecological Research (LTER) site. Twelve years of chronic soil warming at 5 C above the ambient temperature resulted in a significant reduction in microbial biomass and the utilization of a ...

2006
Martin Potthoff Kerri L. Steenwerth Louise E. Jackson Rebecca E. Drenovsky Kate M. Scow Rainer G. Joergensen

Agricultural practices have strong impacts on soil microbes including both the indices related to biomass and activity as well as those related to community composition. In a grassland restoration project in California, where native perennial bunchgrasses were introduced into non-native annual grassland after a period of intensive tillage, weeding, and herbicide use to reduce the annual seed ba...

2008

Climate warming could increase rates of soil organic matter turnover and nutrient mineralization, particularly in northern high-latitude ecosystems. However, the effects of increasing nutrient availability on microbial processes in these ecosystems are poorly understood. To determine how soil microbes respond to nutrient enrichment, we measured microbial biomass, extracellular enzyme activities...

2008

Climate warming could increase rates of soil organic matter turnover and nutrient mineralization, particularly in northern high-latitude ecosystems. However, the effects of increasing nutrient availability on microbial processes in these ecosystems are poorly understood. To determine how soil microbes respond to nutrient enrichment, we measured microbial biomass, extracellular enzyme activities...

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