Characteristics of rice straw decomposition and bacterial community succession for 2 consecutive years in a paddy field in southeastern China
Abstract The characteristics of long-term rice straw decomposition and succession in the bacterial community in the double-rice system are still unclear. Here a 2-year continuous straw bag decomposition experiment was conducted to explore changes in nutrient release, enzyme activity, and bacterial c...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-12-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-25229-8 |
| _version_ | 1797985523940196352 |
|---|---|
| author | Xiya Wang Ping He Xinpeng Xu Shaojun Qiu Shicheng Zhao |
| author_facet | Xiya Wang Ping He Xinpeng Xu Shaojun Qiu Shicheng Zhao |
| author_sort | Xiya Wang |
| collection | DOAJ |
| description | Abstract The characteristics of long-term rice straw decomposition and succession in the bacterial community in the double-rice system are still unclear. Here a 2-year continuous straw bag decomposition experiment was conducted to explore changes in nutrient release, enzyme activity, and bacterial community composition during rice straw decomposition in the double-rice system in Southeast China. After burial in soil, the cumulative dry matter loss rates of rice straw were 38.9%, 72.6%, and 82.7% after 2, 12, and 24 months, respectively. The change in the release rate of straw nitrogen and phosphorus was similar to the dry matter loss, but 93.5% of straw potassium was released after 1st month. Bacterial abundance and community diversity in straw increased rapidly, reaching peaks after 7 and 12 months, respectively. Straw extracellular enzyme activities were the highest in the first 2 months and then gradually decreased over time, and they significantly and positively correlated with straw decomposition rate. Straw decomposition was dominated by copiotrophic Bacilli and Flavobacteriia in the early stages and evolved to be dominated by oligotrophic Acidobacteria, Anaerolineae, Deltaproteobacteria, Saccharibacteria, and Sphingobacteriia in the later stages. Changes in the C/N and K content of straw are the main reasons for bacterial community succession during rice straw decomposition. This study can provide a scientific basis for developing efficient decomposing bacteria agents for rice straw. |
| first_indexed | 2024-04-11T07:19:32Z |
| format | Article |
| id | doaj.art-0d5af3d97a4346b78c38895c8868a54b |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T07:19:32Z |
| publishDate | 2022-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-0d5af3d97a4346b78c38895c8868a54b2022-12-22T04:37:49ZengNature PortfolioScientific Reports2045-23222022-12-011211910.1038/s41598-022-25229-8Characteristics of rice straw decomposition and bacterial community succession for 2 consecutive years in a paddy field in southeastern ChinaXiya Wang0Ping He1Xinpeng Xu2Shaojun Qiu3Shicheng Zhao4Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural SciencesKey Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural SciencesKey Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural SciencesKey Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural SciencesKey Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural SciencesAbstract The characteristics of long-term rice straw decomposition and succession in the bacterial community in the double-rice system are still unclear. Here a 2-year continuous straw bag decomposition experiment was conducted to explore changes in nutrient release, enzyme activity, and bacterial community composition during rice straw decomposition in the double-rice system in Southeast China. After burial in soil, the cumulative dry matter loss rates of rice straw were 38.9%, 72.6%, and 82.7% after 2, 12, and 24 months, respectively. The change in the release rate of straw nitrogen and phosphorus was similar to the dry matter loss, but 93.5% of straw potassium was released after 1st month. Bacterial abundance and community diversity in straw increased rapidly, reaching peaks after 7 and 12 months, respectively. Straw extracellular enzyme activities were the highest in the first 2 months and then gradually decreased over time, and they significantly and positively correlated with straw decomposition rate. Straw decomposition was dominated by copiotrophic Bacilli and Flavobacteriia in the early stages and evolved to be dominated by oligotrophic Acidobacteria, Anaerolineae, Deltaproteobacteria, Saccharibacteria, and Sphingobacteriia in the later stages. Changes in the C/N and K content of straw are the main reasons for bacterial community succession during rice straw decomposition. This study can provide a scientific basis for developing efficient decomposing bacteria agents for rice straw.https://doi.org/10.1038/s41598-022-25229-8 |
| spellingShingle | Xiya Wang Ping He Xinpeng Xu Shaojun Qiu Shicheng Zhao Characteristics of rice straw decomposition and bacterial community succession for 2 consecutive years in a paddy field in southeastern China Scientific Reports |
| title | Characteristics of rice straw decomposition and bacterial community succession for 2 consecutive years in a paddy field in southeastern China |
| title_full | Characteristics of rice straw decomposition and bacterial community succession for 2 consecutive years in a paddy field in southeastern China |
| title_fullStr | Characteristics of rice straw decomposition and bacterial community succession for 2 consecutive years in a paddy field in southeastern China |
| title_full_unstemmed | Characteristics of rice straw decomposition and bacterial community succession for 2 consecutive years in a paddy field in southeastern China |
| title_short | Characteristics of rice straw decomposition and bacterial community succession for 2 consecutive years in a paddy field in southeastern China |
| title_sort | characteristics of rice straw decomposition and bacterial community succession for 2 consecutive years in a paddy field in southeastern china |
| url | https://doi.org/10.1038/s41598-022-25229-8 |
| work_keys_str_mv | AT xiyawang characteristicsofricestrawdecompositionandbacterialcommunitysuccessionfor2consecutiveyearsinapaddyfieldinsoutheasternchina AT pinghe characteristicsofricestrawdecompositionandbacterialcommunitysuccessionfor2consecutiveyearsinapaddyfieldinsoutheasternchina AT xinpengxu characteristicsofricestrawdecompositionandbacterialcommunitysuccessionfor2consecutiveyearsinapaddyfieldinsoutheasternchina AT shaojunqiu characteristicsofricestrawdecompositionandbacterialcommunitysuccessionfor2consecutiveyearsinapaddyfieldinsoutheasternchina AT shichengzhao characteristicsofricestrawdecompositionandbacterialcommunitysuccessionfor2consecutiveyearsinapaddyfieldinsoutheasternchina |