Effects of modified biochar on water and salt distribution and water-stable macro-aggregates in saline-alkaline soil

2021 ◽  
Author(s):  
Manli Duan ◽  
Guohuan Liu ◽  
Beibei Zhou ◽  
Xiaopeng Chen ◽  
Quanjiu Wang ◽  
...  
Keyword(s):  
Alkaline Soil ◽  
Modified Biochar ◽  
Salt Distribution

MgO-modified biochar increases phosphate retention and rice yields in saline-alkaline soil

2019 ◽  
Vol 235 ◽  
pp. 901-909 ◽  
Author(s):  
Lipeng Wu ◽  
Changbin Wei ◽  
Shirong Zhang ◽  
Yidong Wang ◽  
Yakov Kuzyakov ◽  
...  
Keyword(s):  
Alkaline Soil ◽  
Modified Biochar ◽  
Phosphate Retention ◽  
Rice Yields

Cd immobilization and soil quality under Fe–modified biochar in weakly alkaline soil

Chemosphere ◽  
2021 ◽  
pp. 130606
Author(s):  
Tong Sun ◽  
Yingming Xu ◽  
Yuebing Sun ◽  
Lin Wang ◽  
Xuefeng Liang ◽  
...  
Keyword(s):  
Soil Quality ◽  
Alkaline Soil ◽  
Weakly Alkaline ◽  
Modified Biochar

scholarly journals Effects of Modification and Co-Aging with Soils on Cd(II) Adsorption Behaviors and Quantitative Mechanisms by Biochar

2021 ◽  
Author(s):  
Zhuowen Meng ◽  
Shuang Huang ◽  
Zhongbing Lin
Keyword(s):  
Acid Soil ◽  
Carbonate Content ◽  
Alkaline Soil ◽  
Modified Biochar ◽  
Adsorption Behaviors ◽  
Adsorption Capacities ◽  
Mesh Method ◽  
Neutral Soil ◽  
Rice Straw Biochar ◽  
Better Than

Abstract In this study, original rice straw biochar and two KMnO4-modified biochars (pre- and postmodification) were prepared, which were all pyrolysed at 400℃. Premodified biochar had the largest Cd adsorption capacity, strongest acid and solute buffering capacity, which benefited from the increase of carbonate content, specific surface area and the emergence of Mn(II) and MnOx through modification. Original and premodified biochars were then conducted four types of aging process, namely, aging without soil, co-aging with acid (pH=5.00), neutral (pH=7.00) and alkaline (pH=8.30) soils, using an improved three-layer mesh method. The adsorption capacities of modified biochar were always larger than those of original biochar after aging processes. After four aging processes, Cd(II) adsorption capacities were basically in the order of aged biochar without soil > biochar co-aged with alkaline soil > biochar co-aged with neutral soil > biochar co-aged with acid soil, and KMnO4-modified biochar was always better than original biochar after co-aging with soils. The dominant adsorption mechanism of original and premodified biochars (fresh and aged) for Cd(II) was all the precipitation and adsorption with minerals (accounted for 58.55%~85.55%). In this study, we highlighted that biochar remediation for Cd should be evaluated by co-aging with soil instead of aging without soil participation.

Properties of saline-alkaline soil under different land use types in Yellow River Delta

2009 ◽  
Vol 17 (6) ◽  
pp. 1132-1136
Author(s):  
Qing-Mei LI ◽  
Long-Yu HOU ◽  
Yan LIU ◽  
Feng-Yun MA
Keyword(s):  
Land Use ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
Alkaline Soil ◽  
Land Use Types

Maintaining the Camps

2018 ◽  
Author(s):  
Connie Y. Chiang
Keyword(s):  
Environmental Conditions ◽  
Seasonal Changes ◽  
Natural World ◽  
Japanese American ◽  
Alkaline Soil ◽  
Water Pipelines ◽  
American Labor

This chapter focuses on the maintenance of the camps. It explores how wartime shortages and Japanese American labor protests intersected with harsh environmental conditions, complicating the WRA’s efforts to keep the camps running smoothly. One of the first challenges was finding adequate coal to heat the camps during the winter. The WRA then confronted the protests of detainees, who called attention to how seasonal changes added to their labor duties. Alkaline soil, moreover, ate away at water pipelines and required constant repairs. The natural world helped to shape modes of Japanese American resistance, as some individuals refused to work or went on strike.

scholarly journals Biochar and urease inhibitor mitigate NH3 and N2O emissions and improve wheat yield in a urea fertilized alkaline soil

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Khadim Dawar ◽  
Shah Fahad ◽  
M. M. R. Jahangir ◽  
Iqbal Munir ◽  
Syed Sartaj Alam ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Grain Yield ◽  
Block Design ◽  
N Uptake ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
Urease Inhibitor ◽  
Alkaline Soil ◽  
Total N ◽  
N Assimilation

AbstractIn this study, we explored the role of biochar (BC) and/or urease inhibitor (UI) in mitigating ammonia (NH3) and nitrous oxide (N2O) discharge from urea fertilized wheat cultivated fields in Pakistan (34.01°N, 71.71°E). The experiment included five treatments [control, urea (150 kg N ha−1), BC (10 Mg ha−1), urea + BC and urea + BC + UI (1 L ton−1)], which were all repeated four times and were carried out in a randomized complete block design. Urea supplementation along with BC and BC + UI reduced soil NH3 emissions by 27% and 69%, respectively, compared to sole urea application. Nitrous oxide emissions from urea fertilized plots were also reduced by 24% and 53% applying BC and BC + UI, respectively, compared to urea alone. Application of BC with urea improved the grain yield, shoot biomass, and total N uptake of wheat by 13%, 24%, and 12%, respectively, compared to urea alone. Moreover, UI further promoted biomass and grain yield, and N assimilation in wheat by 38%, 22% and 27%, respectively, over sole urea application. In conclusion, application of BC and/or UI can mitigate NH3 and N2O emissions from urea fertilized soil, improve N use efficiency (NUE) and overall crop productivity.

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