نتایج جستجو برای: biochar rate

تعداد نتایج: 965620  

2015
Thomas F. Ducey Jeffrey M. Novak Mark G. Johnson

The amendment of soil with biochar has been demonstrated to have an effect not only on the soil physicochemical properties, but also on soil microbial community composition and activity. Previous reports have demonstrated significant impacts on soil microbial community structure. These impacts are modulated not only by the biochar composition, but also on the soil’s physicochemical characterist...

2014
T. A. Ghezzehei D. V. Sarkhot A. A. Berhe

Recently, the potential for biochar use to recapture excess nutrients from dairy wastewater has been a focus of a growing number of studies. It is suggested that biochar produced from locally available excess biomass can be important in reducing release of excess nutrient elements from agricultural runoff, improving soil productivity, and longterm carbon (C) sequestration. Here we present a rev...

2014
Zeng-Yei Hseu Shih-Hao Jien Wei-Hsin Chien Ruei-Cheng Liou

Food demand and soil sustainability have become urgent issues recently because of the global climate changes. This study aims to evaluate the application of a biochar produced by rice hull, on changes of physiochemical characteristics and erosion potential of a degraded slopeland soil. Rice hull biochar pyrolized at 400°C was incorporated into the soil at rates of 2.5%, 5%, and 10% (w/w) and wa...

2014
Bhupinder Pal Singh Annette L. Cowie

Biochar can influence native soil organic carbon (SOC) mineralisation through "priming effects". However, the long-term direction, persistence and extent of SOC priming by biochar remain uncertain. Using natural (13)C abundance and under controlled laboratory conditions, we show that biochar-stimulated SOC mineralisation ("positive priming") caused a loss of 4 to 44 mg C g(-1) SOC over 2.3 year...

2014
María Sánchez-García Asunción Roig Miguel A. Sánchez-Monedero María L. Cayuela

*Correspondence: María L. Cayuela, CEBAS-CSIC, Campus Universitario de Espinardo, 30100 Murcia, Spain e-mail: [email protected] In spite of the numerous studies reporting a decrease in soil nitrous oxide (N2O) emissions after biochar amendment, there is still a lack of understanding of the processes involved. Hence the subject remains controversial, with a number of studies showing no cha...

2017
Giuliano Bonanomi Francesca Ippolito Gaspare Cesarano Bruno Nanni Nadia Lombardi Angelo Rita Antonio Saracino Felice Scala

Biochar is nowadays largely used as a soil amendment and is commercialized worldwide. However, in temperate agro-ecosystems the beneficial effect of biochar on crop productivity is limited, with several studies reporting negative crop responses. In this work, we studied the effect of 10 biochar and 9 not pyrogenic organic amendments (NPOA), using pure and in all possible combinations on lettuce...

2017
Qiong Yi Shuanghu Tang Xiaolin Fan Mu Zhang Yuwan Pang Xu Huang Qiaoyi Huang

Globally, vegetable fields are the primary source of greenhouse gas emissions. A closed-chamber method together with gas chromatography was used to measure the fluxes of nitrous oxide (N2O) emissions in typical vegetable fields planted with four vegetables sequentially over time in the same field: endive, lettuce, cabbage and sweet corn. Results showed that N2O fluxes occurred in pulses with th...

2013
Maria Luz Cayuela Miguel Angel Sánchez-Monedero Asunción Roig Kelly Hanley Akio Enders Johannes Lehmann

Agricultural soils represent the main source of anthropogenic N2O emissions. Recently, interactions of black carbon with the nitrogen cycle have been recognized and the use of biochar is being investigated as a means to reduce N2O emissions. However, the mechanisms of reduction remain unclear. Here we demonstrate the significant impact of biochar on denitrification, with a consistent decrease i...

Journal: :Bioresource technology 2016
Lu Zhou Yunguo Liu Shaobo Liu Yicheng Yin Guangming Zeng Xiaofei Tan Xi Hu Xinjiang Hu Luhua Jiang Yang Ding Shaoheng Liu Xixian Huang

To investigate the relationship between Cr(VI) adsorption mechanisms and physio-chemical properties of biochar, ramie residues were oxygen-limited pyrolyzed under temperature varying from 300 to 600°C. Batch adsorption experiments indicated that higher pyrolysis temperature limits Cr(VI) sorption in terms of capacity and affinity due to a higher aromatic structure and fewer polar functional gro...

2009

Biochar application to soils is being considered as a means to sequester carbon (C) while concurrently improving soil functions. The main focus of this report is providing a critical scientific review of the current state of knowledge regarding the effects of biochar application to soils on soil properties and functions. Wider issues, including atmospheric emissions and occupational health and ...

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