Tillage with Crop Residue Returning Management Increases Soil Microbial Biomass Turnover in the Double-Cropping Rice Fields of Southern China

The variety of soil microbial biomass carbon (SMBC), soil microbial biomass nitrogen (SMBN) content, and the flux turnover rate of SMBC and SMBN for 0–10 cm and 10–20 cm layers in a paddy field in southern China with different tillage practices were studied. The tillage experiment included conventio...

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Bibliographic Details
Published in:Agronomy (Basel) 2024-01, Vol.14 (2), p.265
Main Authors: Tang, Haiming, Li, Chao, Shi, Lihong, Wen, Li, Li, Weiyan, Cheng, Kaikai, Xiao, Xiaoping
Format: Article
Language:English
Subjects:
Biomass
Carbon
Carbon content
Cereal crops
Crop residues
Crops
Double cropping
Employee turnover
Experiments
Fertilizers
Fluctuations
microbial biomass turnover
Microorganisms
Nitrogen
Potassium
Residues
Rice
Rice fields
Soil fertility
soil microbial biomass carbon
soil microbial biomass nitrogen
Soils
Tillage
Turnover rate
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Summary:The variety of soil microbial biomass carbon (SMBC), soil microbial biomass nitrogen (SMBN) content, and the flux turnover rate of SMBC and SMBN for 0–10 cm and 10–20 cm layers in a paddy field in southern China with different tillage practices were studied. The tillage experiment included conventional tillage and crop residue returning (CT), rotary tillage and crop residue returning (RT), no–tillage and crop residue returning (NT), and rotary tillage with all crop residues removed from the paddy field as a control (RTO). The result showed that the SMBC and SMBN contents at 0–10 cm and 10–20 cm layers in the paddy field with CT, RT, and NT treatments were significantly increased. This result indicates that the flux turnover rate of SMBC and SMBN for 0–10 cm and 10–20 cm layers in the paddy field with CT treatment were increased by 65.49%, 39.61%, and 114.91%, 119.35%, compared with the RTO treatment, respectively. SMBC and SMBN contents and the flux turnover rate of SMBC and SMBN for the 0–10 cm layer were higher than that of the 10–20 cm layer in paddy fields under the same tillage condition. Therefore, applying rotary tillage or conventional tillage and crop residue returning produced beneficial management for increasing soil microbial biomass content and its turnover under a double–cropping rice system in southern China.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy14020265