scholarly journals Microbial biomass carbon and enzyme activities as influenced by tillage, crop rotation and residue management in a sweet sorghum cropping system in marginal soils of South Africa

Heliyon ◽  
2020 ◽  
Vol 6 (11) ◽  
pp. e05513
Author(s):  
Mashapa E. Malobane ◽  
Adornis D. Nciizah ◽  
Patrick Nyambo ◽  
Fhatuwani N. Mudau ◽  
Isaiah I.C. Wakindiki
Keyword(s):  
South Africa ◽  
Microbial Biomass ◽  
Crop Rotation ◽  
Enzyme Activities ◽  
Sweet Sorghum ◽  
Microbial Biomass Carbon ◽  
Cropping System ◽  
Residue Management ◽  
Biomass Carbon ◽  
Marginal Soils

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.

Effect of tillage and residue management on dynamic of soil microbial biomass carbon

2013 ◽  
Vol 33 (4) ◽  
pp. 1308-1316 ◽  
Author(s):  
庞绪 PANG Xu ◽  
何文清 HE Wenqing ◽  
严昌荣 YAN Changrong ◽  
刘恩科 LIU Enke ◽  
刘爽 LIU Shuang ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Microbial Biomass Carbon ◽  
Residue Management ◽  
Biomass Carbon ◽  
Soil Microbial ◽  
Soil Microbial Biomass Carbon

Microbial biomass carbon and enzyme activities of urban soils in Beijing

2011 ◽  
Vol 18 (6) ◽  
pp. 958-967 ◽  
Author(s):  
Meie Wang ◽  
Bernd Markert ◽  
Wenming Shen ◽  
Weiping Chen ◽  
Chi Peng ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Enzyme Activities ◽  
Urban Soils ◽  
Microbial Biomass Carbon ◽  
Biomass Carbon

scholarly journals Tillage, Crop Rotation and Crop Residue Management Effects on Nutrient Availability in a Sweet Sorghum-Based Cropping System in Marginal Soils of South Africa

Agronomy ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 776 ◽  
Author(s):  
Mashapa E. Malobane ◽  
Adornis D. Nciizah ◽  
Fhatuwani N. Mudau ◽  
Isaiah I.C Wakindiki
Keyword(s):  
Soil Fertility ◽  
Nutrient Availability ◽  
Sweet Sorghum ◽  
Crop Residue ◽  
Cropping System ◽  
Residue Management ◽  
Crop Residue Management ◽  
No Till ◽  
Marginal Soils ◽  
Residue Retention

The low soil fertility status of South African marginal soils threatens sustainable production of biofuel feedstock in smallholder farmers. It is therefore imperative to development sustainable and optimal management practices that improve soil fertility. The objective of this study was to determine the effect of tillage, rotation and crop residue management on nutrient availability in a bioenergy sweet sorghum-based cropping system in marginal soils. Two tillage levels, no-till (NT) and conventional tillage (CT); two crop rotations, sweet sorghum–grazing vetch–sweet sorghum (SVS) and sweet sorghum–fallow–sweet sorghum (SFS); and three crop residue retention levels, 0%, 15% and 30%, were tested. No-till enhanced total nitrogen, total organic nitrogen (TON), magnesium (Mg) and sodium (Na) by 3.19% to 45% compared to CT. SVS rotation increased ammonium (NH4+-N) and nitrate (NO3−-N) by 3.42% to 5.98% compared to SFS. A 30% crop residue retention increased NH4+-N, NO3−-N, available phosphorus (Available P), cation exchange capacity (CEC), calcium (Ca), Mg and potassium (K) by 3.58% to 31.94% compared to crop residue removal. In the short term, a 30% crop residue retention was the main treatment that enhanced soil fertility. The application of NT−30% was a better practice to enhance soil fertility. However, research on inclusion of crop diversity/intercropping can add more value to the NT–30% practice in enhancing soil fertility.

scholarly journals Evolution of Soil Biochemical Parameters in Rainfed Crops: Effect of Organic and Mineral Fertilization

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Marta M. Moreno ◽  
Carmen Moreno ◽  
Carlos Lacasta ◽  
Ramón Meco
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Microbial Biomass ◽  
Biochemical Parameters ◽  
Crop Residues ◽  
Microbial Biomass Carbon ◽  
Cropping System ◽  
Biomass Carbon ◽  
Biological Fixation ◽  
Mineral Fertilization

In organic farming, crop fertilization is largely based on the decomposition of organic matter and biological fixation of nutrients. It is therefore necessary to develop studies conducted to know and understand the soil biological processes for the natural nutrient supplies. The effect of three fertilizer managements (chemical with synthetic fertilizers, organic with 2500 kg compost ha−1, and no fertilizer) in a rainfed crop rotation (durum wheat-fallow-barley-vetch as green manure) on different soil biochemical parameters in semi-arid conditions was investigated. Soil organic matter, microbial biomass carbon, organic matter mineralization, CO2production-to-ATP ratio, and NO3-N content were analysed. Fertilization was only applied to cereals. The results showed the scarce effect of the organic fertilization on soil quality, which resulted more dependent on weather conditions. Only soil organic matter and NO3-N were affected by fertilization (significantly higher in the inorganic treatment, 1.28 g 100 g−1and 17.3 ppm, resp.). Soil organic matter was maintained throughout the study period by the inclusion of a legume in the cropping system and the burying of crop residues. In fallow, soil microbial biomass carbon increased considerably (816 ng g−1), and NO3-N at the end of this period was around 35 ppm, equivalent to 100 kg N ha−1.

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