| 佀国涵,朱秀秀,彭成林,袁家富,赵书军,徐大兵,谢媛圆,周剑雄,杨小红.稻虾共作模式下克氏原螯虾对水稻土团聚体特征及有机碳分布的影响[J].农业环境科学学报,2024,43(3):590-596. |
| 稻虾共作模式下克氏原螯虾对水稻土团聚体特征及有机碳分布的影响 |
| Effects of crayfish on aggregate characteristics and organic carbon distribution of paddy soil under integrated rice-crayfish system |
| 投稿时间：2023-03-27 |
| DOI：10.11654/jaes.2023-0224 |
| 中文关键词: 稻虾共作模式 克氏原螯虾 水稳性团聚体 有机碳分布 |
| 英文关键词: integrated rice-crayfish system crayfish water-stable aggregate organic carbon distribution |
| 基金项目:国家重点研发计划项目（2021YFD1901203）；湖北省重点研发计划项目（2021BBA075） |
|
| 摘要点击次数: 319 |
| 全文下载次数: 231 |
| 中文摘要: |
| 为研究长期稻虾共作模式下克氏原螯虾对水稻土团聚体数量、稳定性以及土壤团聚体有机碳含量、分布的影响，本研究依托始于2014年的长期定位试验，设置冬泡无秸秆还田（W）、冬泡+秸秆还田（WS）和冬泡+秸秆还田+养虾（WSC）3个处理，采集各处理表层土壤样品，分析土壤团聚体及有机碳分布特征。结果表明：土壤水稳性团聚体以>1~2 mm粒级为主，在冬泡条件下秸秆还田处理显著提高了土壤中>2 mm团聚体比例、有机碳含量和有机碳贡献率，且增加了土壤团聚体平均质量直径；相对于冬泡+秸秆还田处理，冬泡+秸秆还田+养虾处理土壤>2 mm和>1~2 mm团聚体比例显著提高了19.8%和6.5%，而0.053~0.25 mm团聚体比例则显著下降了9.2%，且>0.25 mm的团聚体数量、平均质量直径和几何平均直径分别提高了7.8%、20.6%和37.5%。冬泡+秸秆还田+养虾处理的土壤总有机碳、微生物量碳和颗粒有机碳含量较冬泡+秸秆还田处理分别显著提高了6.2%、34.0%和23.1%，且显著提高了<0.25 mm团聚体中有机碳的含量。研究表明，稻虾共作模式下克氏原螯虾养殖促进了土壤大团聚体的形成，增强了团聚体稳定性，增加了土壤有机碳及活性组分含量，尤其提高了微团聚体中有机碳含量，提升了土壤固碳能力。 |
| 英文摘要: |
| In order to investigate the effects of crayfish on the quantity and stability of paddy soil aggregates, as well as the content and distribution of organic carbon in soil aggregates under a long-term integrated rice-crayfish system, this study utilized a long-term field experiment that was initiated in 2014. Three treatments were set up:winter flooded fallow without straw returning(W), winter flooded fallow + straw returning(WS), and winter flooded fallow + straw returning + crayfish culture(WSC). Surface soil samples were collected from each treatment, and the distribution characteristics of soil aggregates and organic carbon were analyzed. The results showed that the water-stable aggregates were mainly in the >1-2 mm size range. The WS treatment significantly increased the proportion of >2 mm aggregates, organic carbon content, and organic carbon contribution rate, and also increased the average mass diameter of aggregates. Compared with the WS treatment, the proportion of aggregates >2 mm and >1-2 mm in the WSC treatment significantly increased by 19.8% and 6.5%, respectively, while the proportion of aggregates 0.053-0.25 mm decreased significantly by 9.2%. Moreover, the number of aggregates >0.25 mm, mean weight diameter, and geometric mean diameter in the WSC treatment increased by 7.8%, 20.6% and 37.5%, respectively. The WSC treatment significantly increased the contents of soil total organic carbon, microbial biomass carbon and particulate organic carbon by 6.2%, 34.0% and 23.1%, respectively, and the content of organic carbon in <0.25 mm aggregates was significantly increased compared with that of the WS treatment. These results indicate that crayfish farming in an integrated rice-crayfish system promotes the transformation of small aggregates into large aggregates, improves the stability of soil aggregates, increases the content of soil organic carbon and active components, especially the organic carbon content in micro-aggregates, and enhances the soil carbon sequestration capacity. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
|
|
|
