【目的】系统阐述国内外烟草绿肥模式的研究热点和发展趋势,为推动中国烟草绿色高效生产提供理论支撑。【方法】利用Bibliometrix工具,结合中国知网和Web of Science数据库,综述全球烟草绿肥模式的发文量变化、重要研究机构与学者、研...【目的】系统阐述国内外烟草绿肥模式的研究热点和发展趋势,为推动中国烟草绿色高效生产提供理论支撑。【方法】利用Bibliometrix工具,结合中国知网和Web of Science数据库,综述全球烟草绿肥模式的发文量变化、重要研究机构与学者、研究热点变化和趋势等重要内容,系统对比分析国内外相关研究进展。【结果】截至2024年,国内外烟草绿肥相关研究论文合计684篇,全球烟草绿肥相关研究迅速增长,中国增长趋势尤为显著。中国农业科学研究院与法国国家研究中心是全球重要的烟草绿肥研究机构。国内研究通过大量田间试验验证了绿肥对烟田生态系统的正向调控,而国际学界更注重根际互作等基础理论突破。【结论】文献计量分析揭示了烟草—绿肥轮作研究的现状,即:全球烟草—绿肥轮作研究呈现显著的地域分化特征,国内外研究范式差异明显,近10年来中国已成为该领域的核心贡献国。通过基础理论与应用技术的双向融合,有望突破绿肥应用研究的地域限制,为全球烟区可持续发展提供系统解决方案。展开更多
Ridge culture is a special conservation tillage method, but the long-term influence of this tillage system on soil aggregate-size stability in paddy fields is largely unknown in southwest of China. The paper is to eva...Ridge culture is a special conservation tillage method, but the long-term influence of this tillage system on soil aggregate-size stability in paddy fields is largely unknown in southwest of China. The paper is to evaluate soil aggregate stability and to determine the relationship between soil organic carbon (SOC) and soil aggregate stability. Soil samples at 0 cm-20 cm layer were adopted from a long-term (16 a) field experiment including conventional tillage: plain culture, summer rice crop and winter upland crop under drained conditions (PUR-r); and conservation tillage: ridge culture without tillage, summer rice and winter fallow with floodwater layer annually (NTR-f), winter upland crop under drained conditions (NTR-r), and wide ridge culture without tillage, summer rice crop and winter upland crop under conditions (NTRw-r), respectively. Different pretreatments, such as slaking in fast wetting, wetting and subsequent slaking, were applied to simulate the breakdown mechanisms of aggregates in paddy soil. The results show that soil particles contents were mainly consisted of silt (0.050 mm to 1.000 mm) in fraction of 42.9% to 51.2%, sand (0.050 mm to 0.001 mm) in fraction of 28.0% to 31.8%, and clay (<0.001 mm) in fraction of 17.9% to 25.4%. The amount of aggregate-size was greatly observed in fraction of 2.000 mm-6.720 mm under ridge culture in paddy soil (more than 50$) under slaking and wetting pretreatment. The proportion of soil macro-aggregates (>0.250 mm) in conservation tillage was greatly higher than that in conventional tillage under subsequent fast slaking treatment. Minimal differences of aggregate stability between slaking in fast wetting and wetting were observed, while significant differences were found between ridge culture and plain culture. The aggregate stability under slaking treatment ranked in the order of NTR-r>NTRw-r> NTR-f > PUR-r, while under wetting was NTRw-r > NTR-r > NTR-f >PUR-r. There was a positive correlation between the aggregate stability and SOC concentration under wetting, and a low correlation was observed under slaking pretreatment. Soil exposure with tillage and lack of rice/rape-seed stubble inputs caused declines in aggregation and organic carbon, both of which make soil susceptible to water erosion. Adoption of ridge culture with no-tillage integrated with crop rotation and stubble mulch significantly altered soil organic concentration. It was a valuable conservation practice for soil aggregation and soil organic carbon sequestration on paddy soil.展开更多
文摘【目的】系统阐述国内外烟草绿肥模式的研究热点和发展趋势,为推动中国烟草绿色高效生产提供理论支撑。【方法】利用Bibliometrix工具,结合中国知网和Web of Science数据库,综述全球烟草绿肥模式的发文量变化、重要研究机构与学者、研究热点变化和趋势等重要内容,系统对比分析国内外相关研究进展。【结果】截至2024年,国内外烟草绿肥相关研究论文合计684篇,全球烟草绿肥相关研究迅速增长,中国增长趋势尤为显著。中国农业科学研究院与法国国家研究中心是全球重要的烟草绿肥研究机构。国内研究通过大量田间试验验证了绿肥对烟田生态系统的正向调控,而国际学界更注重根际互作等基础理论突破。【结论】文献计量分析揭示了烟草—绿肥轮作研究的现状,即:全球烟草—绿肥轮作研究呈现显著的地域分化特征,国内外研究范式差异明显,近10年来中国已成为该领域的核心贡献国。通过基础理论与应用技术的双向融合,有望突破绿肥应用研究的地域限制,为全球烟区可持续发展提供系统解决方案。
基金Funded by the Key Projects of National Science & Technology Pillar Program (No.2006BAD05B0-02) Sichuan Educational Committee for Youths (No.09ZB049)
文摘Ridge culture is a special conservation tillage method, but the long-term influence of this tillage system on soil aggregate-size stability in paddy fields is largely unknown in southwest of China. The paper is to evaluate soil aggregate stability and to determine the relationship between soil organic carbon (SOC) and soil aggregate stability. Soil samples at 0 cm-20 cm layer were adopted from a long-term (16 a) field experiment including conventional tillage: plain culture, summer rice crop and winter upland crop under drained conditions (PUR-r); and conservation tillage: ridge culture without tillage, summer rice and winter fallow with floodwater layer annually (NTR-f), winter upland crop under drained conditions (NTR-r), and wide ridge culture without tillage, summer rice crop and winter upland crop under conditions (NTRw-r), respectively. Different pretreatments, such as slaking in fast wetting, wetting and subsequent slaking, were applied to simulate the breakdown mechanisms of aggregates in paddy soil. The results show that soil particles contents were mainly consisted of silt (0.050 mm to 1.000 mm) in fraction of 42.9% to 51.2%, sand (0.050 mm to 0.001 mm) in fraction of 28.0% to 31.8%, and clay (<0.001 mm) in fraction of 17.9% to 25.4%. The amount of aggregate-size was greatly observed in fraction of 2.000 mm-6.720 mm under ridge culture in paddy soil (more than 50$) under slaking and wetting pretreatment. The proportion of soil macro-aggregates (>0.250 mm) in conservation tillage was greatly higher than that in conventional tillage under subsequent fast slaking treatment. Minimal differences of aggregate stability between slaking in fast wetting and wetting were observed, while significant differences were found between ridge culture and plain culture. The aggregate stability under slaking treatment ranked in the order of NTR-r>NTRw-r> NTR-f > PUR-r, while under wetting was NTRw-r > NTR-r > NTR-f >PUR-r. There was a positive correlation between the aggregate stability and SOC concentration under wetting, and a low correlation was observed under slaking pretreatment. Soil exposure with tillage and lack of rice/rape-seed stubble inputs caused declines in aggregation and organic carbon, both of which make soil susceptible to water erosion. Adoption of ridge culture with no-tillage integrated with crop rotation and stubble mulch significantly altered soil organic concentration. It was a valuable conservation practice for soil aggregation and soil organic carbon sequestration on paddy soil.
