Variation in abundance, diversity, and composition of nirK and nirS containing denitrifying bacterial communities in a red paddy soil as affected by combined organic-chemical fertilization

2021 ◽  
Vol 166 ◽  
pp. 104001
Author(s):  
Xun Xiao ◽  
Guixian Xie ◽  
Zehui Yang ◽  
Na He ◽  
Dan Yang ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Bacterial Communities ◽  
Organic Chemical ◽  
Chemical Fertilization ◽  
Red Paddy Soil

Potassium Mobilization and Transformation in Red Paddy Soil as Affected by Rice

2014 ◽  
Vol 106 (3) ◽  
pp. 1011-1017 ◽  
Author(s):  
Xiaokun Li ◽  
Liping Zhan ◽  
Jianwei Lu ◽  
Zhiwen Liao ◽  
Jifu Li ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Red Paddy Soil

Long-term nitrogen fertilization shaped the nifH, nirK and nosZ gene community patterns in red paddy soil in south China。

2020 ◽  
Author(s):  
Cunzhi Zhang ◽  
Kaixun Cao ◽  
Yue Li ◽  
Juan Zhao ◽  
Wentao Peng ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Gene Diversity ◽  
Nifh Gene ◽  
Community Patterns ◽  
Factors Affecting ◽  
Nitrogen Fixers ◽  
Potential Link ◽  
Chemical Factors ◽  
Red Paddy Soil

To understand the diversities of diazotrophs and denitrifiers in red paddy soil under long-term fertilization conditions, nifH, nirK and nosZ libraries were constructed based on the PCR-RFLP method. nirK gene diversity proved to be lower than that of nosZ and nifH, and nirK and nosZ genes were more sensitive to different fertilization treatments than those with the nifH gene. Diverse microbes including the α-, β-, γ- and δ- subclasses of the Proteobacteria dominated the three libraries. Long-term addition of urea with straw-mulching and azophoska increased the abundance of non-symbiotic diazotrophs, which indicated that non-symbiotic diazotrophs were responsible for the majority of the nitrogen-fixing ability in paddy soil. In addition, a potential link between nifH and nosZ was found due to the existence of nitrogen fixers, such as Bradyrhizobium and Ralstonia in the nosZ library. The main chemical factors affecting the three genes were identified, pH was the most important factor of nifH community, and nirK genes were more affected by pH and organic matter, available potassium and carbon to nitrogen ratio significantly influenced the community structure of the nosZ genes.

scholarly journals The effects of the depth of fertilization on losses of nitrogen and phosphorus and soil fertility in the red paddy soil of China

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11347
Author(s):  
Kun Hou ◽  
Ying Huang ◽  
Xiangmin Rong ◽  
Jianwei Peng ◽  
Chang Tian ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Ammonia Volatilization ◽  
Soil Column ◽  
Nitrogen And Phosphorus ◽  
Total N ◽  
Optimal Depth ◽  
Significant Difference ◽  
Research Objects ◽  
Minimal Environmental Impact ◽  
Red Paddy Soil

Nitrogen (N) and phosphorus (P) losses from agroecosystems are dominant nonpoint pollution. To minimize the losses of N and P, the optimal depth of fertilization was explored using a soil column study with the red paddy soil as the research objects. The losses of N and P were measured under five depths of fertilization (0, 5, 7.5, 10, and 12.5 cm) as well as no fertilization. The results showed that ammonia volatilization was significantly decreased with increasing fertilization depth within 0–10 cm, and there was no significant difference among the 10 cm, 12.5 cm, and no-fertilization treatments. Comparing with surface fertilization (0 cm), N and P losses by runoff could be reduced by 30.7–67.1% and 96.9–98.7% respectively by fertilization at 5–12.5 cm. In addition, deep fertilization (5–12.5 cm) did not increase N and P losses by leaching at the depth of 40 cm. Total N and P contents in the tillage layer of soil were increased by 5.1 to 22.8% and by −1.0 to 7.5%, respectively. Fertilization at 10cm depth has the potential to minimal environmental impact in the red paddy soil of south China, at this depth, NH3 volatilization was reduced by 95.1%, and N and P losses by runoff were reduced by 62.0% and 98.4%, respectively, compared with surface fertilization.

Ammonia-oxidizing archaea are more sensitive than ammonia-oxidizing bacteria to long-term application of green manure in red paddy soil

2018 ◽  
Vol 124 ◽  
pp. 185-193 ◽  
Author(s):  
Songjuan Gao ◽  
Weidong Cao ◽  
Chunqin Zou ◽  
Jusheng Gao ◽  
Jing Huang ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Green Manure ◽  
Ammonia Oxidizing Bacteria ◽  
Ammonia Oxidizing Archaea ◽  
Red Paddy Soil

Transcriptional activity of paddy soil bacterial communities

2009 ◽  
Vol 11 (4) ◽  
pp. 960-970 ◽  
Author(s):  
Pravin Malla Shrestha ◽  
Michael Kube ◽  
Richard Reinhardt ◽  
Werner Liesack
Keyword(s):  
Paddy Soil ◽  
Bacterial Communities ◽  
Transcriptional Activity ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

Effect of riboflavin on active bacterial communities and arsenic-respiring gene and bacteria in arsenic-contaminated paddy soil

Geoderma ◽  
2021 ◽  
Vol 382 ◽  
pp. 114706
Author(s):  
Jiangtao Qiao ◽  
Xiaomin Li ◽  
Fangbai Li ◽  
Songxiong Zhong ◽  
Manjia Chen
Keyword(s):  
Paddy Soil ◽  
Bacterial Communities ◽  
Contaminated Paddy Soil

scholarly journals Long-term rice-rice-green manure rotation changing the microbial communities in typical red paddy soil in South China

2015 ◽  
Vol 14 (12) ◽  
pp. 2512-2520 ◽  
Author(s):  
Song-juan GAO ◽  
Ren-gang ZHANG ◽  
Wei-dong CAO ◽  
Yuan-yuan FAN ◽  
Ju-sheng GAO ◽  
...  
Keyword(s):  
Microbial Communities ◽  
South China ◽  
Paddy Soil ◽  
Green Manure ◽  
Red Paddy Soil

scholarly journals Bacterial communities in paddy soil and ditch sediment under rice-crab co-culture system

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xu Jiang ◽  
Hui Ma ◽  
Qing-lei Zhao ◽  
Jun Yang ◽  
Cai-yun Xin ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Relative Abundance ◽  
Paddy Soil ◽  
Bacterial Communities ◽  
Bacterial Community Structure ◽  
High Throughput Sequencing ◽  
Available Phosphorus ◽  
Uncultured Bacterium ◽  
Ditch Sediment

AbstractAs an important form of sustainable agriculture, rice-crab (Eriocheir sinensis) co-culture is rapid developing worldwide. However, the knowledge on the bacterial communities of the different components of the system is limited. In this study, we investigated the bacterial community structure in paddy soil and ditch sediment by using high-throughput sequencing technology. The results showed that compared with the ditch sediment, the content of NH4+-N in paddy soil decreased by 62.31%, and the content of AP (available phosphorus) increased by 172.02% (P < 0.05). The most abundant phyla in paddy soil and ditch sediment were Proteobacteria, Bacteroidetes and Chloroflexi, whose relative abundance was above 65%. Among the dominant genera, the relative abundance of an uncultured bacterium genus of Saprospiraceae and an uncultured bacterium genus of Lentimicrobiaceae in paddy soil was significantly lower than ditch sediment (P < 0.05). Alpha diversity indicated that the bacterial diversity of paddy soil and ditch sediment was similar. The bacterial community structure was affected by the relative abundance of bacteria, not the species of bacteria. Redundancy analysis (RDA) showed that the bacterial communities in paddy soil and ditch sediment were correlated with physicochemical properties. Our findings showed that the bacterial community structure was distinct in paddy soil and ditch sediment under rice-crab co-culture probably due to their different management patterns. These results can provide theoretical support for improving rice-crab co-culture technology.

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