水土保持研究2025，Vol.32Issue(4)：117-123,130,8.DOI:10.13869/j.cnki.rswc.2025.04.006
水稻田临时转换草皮田5年对土壤物理性质的影响
Effects of 5-year temporary conversion of paddy fields to turfgrass fields on soil physical properties
摘要
Abstract
[Objective]This study aims to explore the effects of converting paddy fields to turfgrass fields on soil physical properties,to clarify the mechanism of soil degradation,so as to provide a scientific basis for the reclamation and improvement of degraded turfgrass fields.[Methods]Using long-term rice-planted river sand clay fields in the eastern part of Hunan Province and the adjacent turfgrass fields temporarily converted for 5 years as research subjects,the study explored the response of soil physical properties to the temporary conversion of paddy fields to turfgrass by combining field sampling,experimental analysis,and simulation.[Results](1)Conversion from paddy fields to turfgrass fields caused a rapid reduction in the plow layer thickness,with an average decrease of about 11 cm,exposing the plow layer.The sand content in the 0-15 cm surface layer decreased by 30%～63%,whereas the clay content increased by 16%～21%(p<0.05).The soil texture shifted from loam to sandy clay loam,showing a trend of becoming more clayey.(2)Compared with paddy fields,the bulk density and compactness of the soil in turfgrass fields at 0-15 cm and 15-30 cm were 15%～80%higher.Soil water-holding capacity was 40%～55%lower,while soil erodibility index(KEPIC value)increased by 4.2%～8.5%(p<0.05).The infiltration rate of the surface soil was only 2%of that in the adjacent paddy fields.(3)The content of>2 mm large aggregates and the aggregate stability index(STAB10)in turfgrass field soil was 16%～43%higher than in paddy soils,while the content of small aggregates,micro-aggregates,and silt-clay particles was 17%～64%lower(p<0.05).Soil structure evolved from granular to blocky and massive.(4)After simulating 15 days of soil flooding in turfgrass soils,surface soil compactness decreased by 75%～76%,while volume water content increased by 49%～53%(p<0.05).[Conclusion]The temporary conversion of paddy fields to turfgrass fields resulted in soil compaction,structural deterioration,clayey texture,and reduced water-holding capacity.Continuous flooding for 3～5 days in turfgrass fields significantly improved the surface soil looseness and moisture conditions.This approach is recommended for restoring over-compacted and moisture-deficient turfgrass field soils.关键词
非粮化/水田/草坪草/水稻土/土壤持水性能/土壤稳定性Key words
non-grain/paddy fields/turfgrass/paddy soil/soil water-holding capacity/soil stability分类
农业科技引用本文复制引用
王俊,梁万栋,罗飞雪,肖华翠,许超,谷雨,谢红霞,曹威,盛浩..水稻田临时转换草皮田5年对土壤物理性质的影响[J].水土保持研究,2025,32(4):117-123,130,8.基金项目
湖南省重点研发计划项目(2023NK2026) （2023NK2026）
国家自然科学基金(41571234) （41571234）
科技基础资源调查专项课题(2021FY100504) （2021FY100504）
