Published in Chinese Geographical Science
Microbial metabolic quotient (MMQ) is the rate of soil microbial respiration per unit of microbial biomass, and represents the capacity of soil microbes to utilize soil organic matter. Understanding the regional variation and determinants of MMQ can help predict the responses of soil respiration rate to global climate change. Accordingly, we measur...
Published in Ying yong sheng tai xue bao = The journal of applied ecology
土壤微生物在维持陆地生态系统服务中扮演着重要的角色.土壤水分条件是影响微生物活性与生态系统功能的重要因素之一,全球气候变化所引起的极端干旱与降雨必将加速土壤水分的剧烈变化.由于不同土壤微生物对干旱胁迫的耐受性不同及其对水分变化的响应差异,使得土壤水分条件变化直接改变了土壤微生物活性与群落结构,进而对微生物介导的关键过程与土壤生态系统功能造成深刻的影响.因此,全面深入地理解水分条件变化下土壤微生物群落的结构变化特征与响应机制具有重要意义.本文在总结土壤水分条件变化对土壤微生物活性(土壤呼吸与酶活性)和微生物群落结构的影响的基础上,进一步阐述了土壤微生物对干旱胁迫与水分条件变化的响应机制和生态学策略,包括: 1)积累胞内溶质、产生胞外聚合物、进入休眠状态等应对干旱胁迫的细胞生理策略;2)微生物之...
Published in Russian Journal of Ecology
AbstractTechnogenic barren lands formed under the influence of sulfur dioxide and heavy metal emissions near nonferrous metallurgy enterprises on the Kola Peninsula are characterized by inhibited CO2 emission from soils (10–30 mg C m–2 h–1, or 12–26 g C m–2 summer–1). Remediation of barrens promotes the growth of plant roots and microorganisms, the...
Published in Frontiers in Environmental Science
Soil amendment with biochar can modify soil microbial abundance, activity and community structure. Nevertheless, the long-term evolution of these effects is unknown and of critical importance because biochar persists in soil for centuries. We selected nine charcoal kiln sites (CKS) from forests (four sites) and croplands (five sites) and determined...
Published in Royal Society open science
Soil carbon reserves are the largest terrestrial carbon pools. Common agricultural practices, such as high fertilization rates and intensive crop rotation, have led to global-scale environmental changes, including decreased soil organic matter, lower carbon/nitrogen ratios and disruption of soil carbon pools. These changes have resulted in a decrea...
Namen naloge je zasnova, izdelava in testiranje lastne merilne postaje za meritve dihanja tal. Za namen boljše prostorske pokritosti meritev dihanja tal bo zasnovana naprava vsebovala različne avtomatizirane aktuatorske sklope. V nalogi smo prikazali možnost izdelave lastnega nedisperzivnega infrardečega (NDIR) merilnega zaznavala, predstaviti omej...
Present gaps in the representation of key soil biogeochemical processes such as the partitioning of soil organic carbon (SOC) among functional components, microbial biomass and diversity, and the coupling of carbon and nutrient cycles present a challenge to improving the reliability of projected soil carbon dynamics. We introduce a new soil biogeoc...
Increasing soil carbon stocks in agricultural grasslands has a strong potential to mitigate climate change. However, large uncertainties around the drivers of soil respiration hinder our ability to identify management practices that enhance soil carbon sequestration. In a context where more intense and prolonged droughts are predicted in many regio...
Published in Global change biology
Predicting future carbon (C) dynamics in grassland ecosystems requires knowledge of how grazing and global climate change (e.g., warming, elevated CO2 , increased precipitation, drought, and N fertilization) interact to influence C storage and release. Here, we synthesized data from 223 grassland studies to quantify the individual and interactive e...
Published in Huan jing ke xue= Huanjing kexue
A five year (2013-2017) experiment was conducted to explore the effects of biochar application on the dynamic changes in soil respiration, soil water, and heat factors under four treatments:CK (without biochar), T1 (with 1.5 t·hm-2biochar), T2 (with 15 t·hm-2biochar), and T3 (with 45 t·hm-2biochar). The results showed that:① the soil respiration ra...
