scholarly journals Response of soil carbon dioxide fluxes, soil organic carbon and microbial biomass carbon to biochar amendment: a meta-analysis

GCB Bioenergy ◽  
2015 ◽  
Vol 8 (2) ◽  
pp. 392-406 ◽  
Author(s):  
Shuwei Liu ◽  
Yaojun Zhang ◽  
Yajie Zong ◽  
Zhiqiang Hu ◽  
Shuang Wu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Microbial Biomass Carbon ◽  
Meta Analysis ◽  
Biomass Carbon ◽  
Carbon Dioxide Fluxes ◽  
Soil Carbon Dioxide ◽  
Biochar Amendment

scholarly journals Differences of soil enzyme activities and its influencing factors under different flooding conditions in Ili Valley, Xinjiang

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e8531 ◽  
Author(s):  
Yulu Zhang ◽  
Dong Cui ◽  
Haijun Yang ◽  
Nijat Kasim
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Total Phosphorus ◽  
Enzyme Activities ◽  
Catalase Activity ◽  
Microbial Biomass Carbon ◽  
Chemical Properties ◽  
Soil Enzyme ◽  
Biomass Carbon

Background A wetland is a special ecosystem formed by the interaction of land and water. The moisture content variation will greatly affect the function and structure of the wetland internal system. Method In this paper, three kinds of wetlands with different flooding levels (Phragmites australis wetland (long-term flooding), Calamagrostis epigeios wetland(seasonal flooding) and Ditch millet wetland (rarely flooded)) in Ili Valley of Xinjiang China were selected as research areas. The changes of microbial biomass carbon, soil physical and chemical properties in wetlands were compared, and redundancy analysis was used to analyze the correlation between soil physical and chemical properties, microbial biomass carbon and enzyme activities (soil sucrase, catalase, amylase and urease). The differences of soil enzyme activities and its influencing factors under different flooding conditions in Ili Valley were studied and discussed. Result The results of this study were the following: (1) The activities of sucrase and amylase in rarely flooded wetlands and seasonally flooded wetlands were significantly higher than those in long-term flooded wetlands; the difference of catalase activity in seasonal flooded wetland was significant and the highest. (2) Redundancy analysis showed that soil organic carbon, dissolved organic carbon, total phosphorus and soil microbial biomass carbon had significant effects on soil enzyme activity (p < 0.05). (3) The correlation between soil organic carbon and the sucrase activity, total phosphorus and the catalase activity was the strongest; while soil organic carbon has a significant positive correlation with invertase, urease and amylase activity, with a slight influence on catalase activity. The results of this study showed that the content of organic carbon, total phosphorus and other soil fertility factors in the soil would be increased and the enzyme activity would be enhanced if the flooding degree was changed properly.

scholarly journals Ratio of soil microbial biomass carbon to soil organic carbon in Himalayan rangeland

2018 ◽  
Vol 2 ◽  
pp. 96-101
Author(s):  
Dil Kumar Limbu ◽  
Madan Koirala
Keyword(s):  
Organic Matter ◽  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Microbial Biomass ◽  
Microbial Biomass Carbon ◽  
Biomass Carbon ◽  
Soil Microbial ◽  
Soil Microbial Biomass Carbon ◽  
Microbial Carbon

The soil microbial biomass carbon to soil organic carbon ratio is a useful measure to monitor soil organic matter and serves as a sensitive index than soil organic carbon alone. Thus, the objective of this study is to identify and quantify the present status of ratio of soil microbial biomass carbon to soil organic carbon in Himalayan rangeland and to make recommendations for enhancing balance between microbial carbon and organic carbon of the soil. To meet the aforementioned objective, a field study was conducted from 2011 to 2013 following the Walkley-Black, Chromic acid wet oxidation method, and chloroform fumigation method for analysis of microbial carbon and organic carbon respectively. The study showed that the heavily grazed plot had significantly less value of ratio than occasionally grazed and ungrazed plots. The ratio was significantly high on legume seeding plot compared to nonlegume plot, but the ratio was independent of soil depth. Soil microbial biomass appeared to be more responsive than soil organic matter.

Influence of Plastic Mulching on Soil Moisture, Nutrient and Microbial Biomass in Pineapple Cultivation on Undulating Hilly Areas of Nagaland

Agropedology ◽  
2019 ◽  
Vol 29 (1) ◽  
Author(s):  
Christy Sangma ◽  
◽  
A. Thirugnanavel ◽  
Ph. Romen Sharma ◽  
G. Rajesha ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Moisture Content ◽  
Microbial Biomass Carbon ◽  
Fertility Level ◽  
Biomass Carbon ◽  
Available N ◽  
Plastic Mulching

The pineapple var. Kew was planted on black polythene film mulching with double hedgerow planting to find out the influence of mulches on soil and plant. The soil samples were collected twice (kharif and rabi) at two different depths (0-15 and 15-30 cm), and the pH, soil organic carbon (SOC), nitrogen, phosphorus, potassium, basal respiration and soil microbial biomass carbon were analysed. The data revealed that soil organic carbon and available N, P, and K content were slightly higher in the bottom hill than the top hill. The mulched field had higher nutrients than the non-mulched field. The fertility level varied slightly between the seasons. The biological parameters (microbial biomass carbon) were observed to be significantly higher (P≤0.05) in the bottom hill in both the seasons than the non-mulched field. The soil moisture content ranged from 5.9 % in March to 24.24 % August in the bottom hill (15-30 cm depth). The moisture content in the non-mulched field was lower than the mulched field.

Microbial properties in European arable soils with different tillage systems

2020 ◽  
Author(s):  
Deborah Linsler ◽  
Jacqueline Gerigk ◽  
Ilka Schmoock ◽  
Rainer Georg Jörgensen ◽  
Martin Potthoff
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Microbial Biomass Carbon ◽  
Conventional Tillage ◽  
No Tillage ◽  
Biomass Carbon ◽  
Site Specific ◽  
Carbon And Nitrogen ◽  
Tillage Practices

&lt;p&gt;Reduced tillage is assumed to be a suitable practice to maintain and promote microbial biomass and microbial activity in the soil. The microbial biomass in particular is considered as a sensitive indicator for detecting soil disturbances. The objective of this study was to quantify the influence of different tillage practices on microbial parameters in the soil. Furthermore, we analyzed the relation of those microbial parameters with site-specific conditions.&lt;/p&gt;&lt;p&gt;To get a deeper insight in that topic, soils from different fields of agricultural farms with different tillage practices in France (12 fields), Romania (15 fields) and Sweden (17 fields) were examined within the &amp;#8220;SoilMan project&amp;#8221;. The tillage practices were no-tillage (absence of any tillage), minimum tillage (non-inversion tillage for instance by chisel plough or cultivator) and conventional tillage (inversion tillage by ploughing), all of which were carried out for at least five years prior to sampling. Soil samples were taken in spring 2018 from all fields under winter wheat (Triticum aestivum) at three soil depths (0-10 cm, 10-20 cm, 20-30 cm). As microbial parameters we measured microbial biomass carbon and nitrogen contents, ergosterol contents (as proxy for fungi) and basal respiration rates. For site-specific conditions we measured soil organic carbon, total nitrogen and total phosphorus contents, texture, pH and the soil water content.&lt;/p&gt;&lt;p&gt;Results show that microbial biomass carbon and nitrogen were more affected by soil type and soil texture as well as climatic conditions (mean precipitation and temperature) than by tillage practices. For instance, an increased clay content had a positive effect on the microbial biomass and, in addition to the higher average annual temperature, explained the generally low values &amp;#8203;&amp;#8203;in France. The lack of inversion tillage primarily led to stratified levels of soil organic carbon, microbial biomass carbon and ergosterol contents, which can be explained by the lack of crop residue incorporation. There were hardly any differences in microbial indicators between the tillage intensities when looking at the whole of the sampled soil profile (0-30 cm). In France, the microbial biomass carbon / soil organic carbon ratio was lower for no-tillage than for conventional tillage, which may indicate, among other things, that the mechanically ground organic matter incorporated into the soil under conventional tillage was better colonized by microorganisms. However, this effect could not be confirmed in the other countries. The metabolic quotient was generally increased at the lowest sampled depth (20-30 cm), irrespective of the cultivation.&lt;/p&gt;&lt;p&gt;We can conclude that the soil tillage intensity influenced the distribution of microbial biomass carbon and soil organic carbon contents more strongly than the total amounts in the sampled soil profile and that the soil texture had a greater impact on microbial soil properties than the agricultural management practice.&lt;/p&gt;

scholarly journals Dynamics of Soil Organic Carbon and Microbial Biomass Carbon in Relation to Water Erosion and Tillage Erosion

PLoS ONE ◽  
2013 ◽  
Vol 8 (5) ◽  
pp. e64059 ◽  
Author(s):  
Nie Xiaojun ◽  
Zhang Jianhui ◽  
Su Zhengan
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Microbial Biomass Carbon ◽  
Water Erosion ◽  
Biomass Carbon ◽  
Tillage Erosion

scholarly journals Grape Pruning Material Improves Root Development and Soil Microecology in ‘Shine Muscat’ Grape Soils

HortScience ◽  
2020 ◽  
Vol 55 (12) ◽  
pp. 2011-2022
Author(s):  
Hong Su ◽  
He Zhang ◽  
Chaoxia Wang ◽  
Jianquan Huang ◽  
Jiayin Shang ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Content ◽  
Relative Abundance ◽  
Root Development ◽  
Microbial Biomass Carbon ◽  
Garden Soil ◽  
Biomass Carbon ◽  
Fresh Weight

The addition of pulverized grape pruning wood to grape soils has a positive effect on fruit quality. However, its effects on the soil microecology of the root zone and the growth of the grape plants are not fully understood. To address this, ‘Shine Muscat’ grapes were cultivated in media consisting of garden soil and crushed grape pruning material at different mass ratios [100:1 (T1), 50:1 (T2), 30:1 (T3), 20:1 (T4), and 10:1 (T5)] and in garden soil without the pruning material, as a control. The changes in the plant fresh weight, leaf area, soil and plant analyzer development (SPAD) value, root development, soil organic carbon, microbial biomass carbon, and soil enzyme activity were determined over time. High-throughput sequencing technology was used to determine the soil bacterial community structures. The pruning supplementation increased the grape plants fresh weight, leaf area, and SPAD values. The T2 and T3 treatments increased the grape root length, surface area, and the projected area and number of the root tips; the soil organic carbon content, microbial biomass carbon content, soil invertase activity, amylase activity, and β-glucosidase activity were also significantly increased. The addition of the grape pruning material was found to increase the bacterial diversity and richness 60 and 150 days after treatment. At the phylum level, Proteobacteria, Acidobacteria, and Actinobacteria were the dominant groups, and the grape pruning material increased the relative abundance of the Acidobacteria and Actinobacteria after 60 and 150 days. The relative abundance of the Actinobacteria in the T2 treatment was 1.7, 1.3, 1.5, and 1.3 times that of the control, after 60, 90, 120, and 150 days, respectively. The T2 treatment was identified as the optimal treatment for grapes in the field because it improved the soil microecology and promoted root and tree development the most compared with the other treatments tested.

Soil organic carbon and microbial biomass carbon under organic and conventional vegetable cropping systems in an Alfisol and a Vertisol

2014 ◽  
Vol 101 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Yadunath Bajgai ◽  
Paul Kristiansen ◽  
Nilantha Hulugalle ◽  
Melinda McHenry ◽  
Bruce McCorkell
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Microbial Biomass Carbon ◽  
Cropping Systems ◽  
Biomass Carbon
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