Effects of long‐term fertilizer management on soil bacterial diversity in double‐cropping paddy field of southern China

2020 ◽  
Vol 112 (5) ◽  
pp. 3644-3652
Author(s):  
Haiming Tang ◽  
Yilan Xu ◽  
Chao Li ◽  
Xiaoping Xiao ◽  
Kaikai Cheng ◽  
...  
Keyword(s):  
Bacterial Diversity ◽  
Paddy Field ◽  
Southern China ◽  
Fertilizer Management ◽  
Soil Bacterial Diversity ◽  
Double Cropping ◽  
Soil Bacterial

Functional soil organic matter fractions in response to long-term fertilizer management in a double-cropping paddy field of southern China

2021 ◽  
pp. 1-9
Author(s):  
Haiming Tang ◽  
Chao Li ◽  
Lihong Shi ◽  
Li Wen ◽  
Kaikai Cheng ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Paddy Field ◽  
Southern China ◽  
Rice Paddy ◽  
Chemical Fertilizer ◽  
Protection Mechanism ◽  
Rice Paddy Field ◽  
Double Cropping

Abstract Soil organic matter (SOM) and its fractions play an important role in maintaining or improving soil quality and soil fertility. Therefore, the effects of a 34-year long-term fertilizer regime on six functional SOM fractions under a double-cropping rice paddy field of southern China were studied in the current paper. The field experiment included four different fertilizer treatments: chemical fertilizer alone (MF), rice straw residue and chemical fertilizer (RF), 30% organic manure and 70% chemical fertilizer (OM) and without fertilizer input as control (CK). The results showed that coarse unprotected particulate organic matter (cPOM), biochemically, physically–biochemically and chemically protected silt-sized fractions (NH-dSilt, NH-μSilt and H-dSilt) were the main carbon (C) storage fractions under long-term fertilization conditions, accounting for 16.7–26.5, 31.1–35.6, 16.2–17.3 and 7.5–8.2% of the total soil organic carbon (SOC) content in paddy soil, respectively. Compared with control, OM treatment increased the SOC content in the cPOM, fine unprotected POM fraction, pure physically protected fraction and physico-chemically protected fractions by 58.9, 106.7, 117.6 and 28.3%, respectively. The largest proportion of SOC to total SOC in the different fractions was biochemically protected, followed by chemically and unprotected, and physically protected were the smallest. These results suggested that a physical protection mechanism plays an important role in stabilizing C of paddy soil. In summary, the results showed that higher functional SOM fractions and physical protection mechanism play an important role in SOM cycling in terms of C sequestration under the double-cropping rice paddy field.

scholarly journals Organic manure managements increases soil microbial community structure and diversity in double-cropping paddy field of Southern China

2020 ◽  
Author(s):  
Haiming Tang ◽  
Xiaoping Xiao ◽  
Chao Li ◽  
Xiaochen Pan ◽  
Kaikai Cheng ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Rice Straw ◽  
Paddy Field ◽  
Southern China ◽  
Soil Microbial Communities ◽  
Organic Manure ◽  
Chemical Fertilizer ◽  
Soil Microbial ◽  
Double Cropping ◽  
Soil Bacterial

AbstractThe soil physicochemical properties were affected by different fertilizer managements, and the soil microbial communities were changed. Fertilizer regimes were closely relative to the soil texture and nutrient status in a double-cropping paddy field of southern China. However, there was limited information about the influence of different long-term fertilizer management practices on the soil microbial communities in a double-cropping rice (Oryza sativa L.) fields. Therefore, the 39-year long-term fertilizer regimes on soil bacterial and fungal diversity in a double-cropping paddy field of southern China were studied by using Illumina sequencing and quantitative PCR technology in the present paper. The filed experiment were including chemical fertilizer alone (MF), rice straw residue and chemical fertilizer (RF), 30% organic manure and 70% chemical fertilizer (OM), and without fertilizer input as a control (CK). The results showed that diversity indices of soil microbial communities with application of organic manure and rice straw residue treatments were higher than that without fertilizer input treatment. Application of organic manure and rice straw residue managements increase soil bacterial abundance of the phylum Proteobacteria, Actinobacteria, and Gammaproteobacteria, and soil fungi abundance of the phylum Basidiomycota, Zygomycota and Tremellales were also increased. Compared with CK treatment, the value of Richness, Shannon and McIntosh indices, and taxonomic diversity were increased with RF and OM treatments. This finding demonstrated that RF and OM treatments modify soil bacterial and fungal diversity. Therefore, the combined application of organic manure or rice straw residue with chemical fertilizer managements could significantly increase the abundance of profitable functional bacteria and fungi species in double-cropping rice fields of southern China.

Land use controls soil bacterial diversity in the dry-hot valley region, Southern China

2019 ◽  
Vol 66 (5) ◽  
pp. 694-705 ◽  
Author(s):  
Baiyun He ◽  
Xingwu Duan ◽  
Li Rong ◽  
Ruihuan Zhang ◽  
Ya Li ◽  
...  
Keyword(s):  
Land Use ◽  
Bacterial Diversity ◽  
Southern China ◽  
Soil Bacterial Diversity ◽  
Land Use Controls ◽  
Soil Bacterial

Methane and nitrous oxide emissions as affected by long-term fertilizer management from double-cropping paddy fields in Southern China

2016 ◽  
Vol 154 (8) ◽  
pp. 1378-1391 ◽  
Author(s):  
H.-M. TANG ◽  
X.-P. XIAO ◽  
K. WANG ◽  
W.-Y. LI ◽  
J. LIU ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Grain Yield ◽  
Southern China ◽  
Mineral Fertilizer ◽  
Paddy Fields ◽  
Rice Grain ◽  
Fertilizer Management ◽  
Double Cropping ◽  
Rice Residues

SUMMARYThere is limited information about the influences of long-term fertilizer management on methane (CH4) and nitrous oxide (N2O) emissions from double-cropping paddy fields in Southern China. Therefore, the objective of the present study was to characterize the changes of CH4 and N2O related to different fertilizer treatments based on a long-term field experiment. The experiment was initiated in 1986 and consisted of five treatments: unfertilized (CK), mineral fertilizer alone (MF), rice residues plus mineral fertilizer (RF), low manure rate plus mineral fertilizer (M1 + F), and high manure rate plus mineral fertilizer (M2 + F). Investigations were conducted over 2 years, from 2013 to 2014, to examine the CH4 and N2O emissions from paddy field of Southern China. The results indicated that M2 + F plots had the largest CH4 emissions during the early rice and late cropped rice and that MF and RF had larger N2O emissions than CK in both early and late cropped rice. When compared with the control, total N2O emissions in both rice-growing seasons increased in both MF and RF in 2013 and 2014. The global warming potentials (GWP) from paddy fields were ranked as M2 + F > M1 + F > RF > MF > CK. Meanwhile, the results demonstrated that CH4 and N2O emissions were closely associated with the soil redox potential and soil temperature. In summary, the incorporation of rice residues in addition to the use of mineral fertilizer (RF treatment) may be an effective fertilizer management practice for mitigating total GWP per grain yield and maintaining rice grain yield in southern China.

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