贵州农业科学2026，Vol.54Issue(1)：30-37,8.DOI:10.3969/j.issn.1001-3601.2026.01.004
埋深对广西不同稻区水稻秸秆养分释放特征的影响
Impact of Burial Depth on Nutrient Release Characteristics of Rice Straw in Different Rice-growing Regions of Guangxi
摘要
Abstract
[Objective]The effect of burial depth on nutrient release characteristics of rice straw in major rice-growing regions of Guangxi,China was investigated to determine the optimal straw turnover depth and provide the scientific basis for efficient utilization of straw resources,optimization of straw turnover technique and sustainable nutrient management in agricultural ecosystems.[Method]The effect of three burial depth treatments(0-5 cm,5-10 cm and 10-20 cm)on nutrient release characteristics of rice straw was analyzed by a field decomposition experiment in five rice-growing regions of Guangxi(Shangsi,Hengzhou,Binyang,Yizhou,and Liucheng).[Result]The release rate of carbon,nitrogen,phosphorus and potassium from rice straw in Shangsi,Hengzhou,and Binyang rice-growing regions decreased with increase of burial depth.The release rate of carbon,nitrogen,phosphorus and potassium from rice straw with 0-5 cm burial depth was 2.4%-7.7%,4.7%-7.9%,3.7%-4.5%and 4.0%-7.5%higher than that rice straw with 10-20 cm burial depth respectively.The release rate of carbon,phosphorus and potassium from rice straw with 0-5 cm burial depth in Yizhou rice-growing region was the highest and the nitrogen release rate of rice straw with 5-10 cm burial depth was the highest.The release rate of carbon,nitrogen,phosphorus and potassium from rice straw with 10-20 cm burial depth was the highest in Liucheng rice-growing region,and 3.6%,3.5%,4.2%and 3.2%higher than that of rice straw with 0-5 cm burial depth respectively.The release rate of carbon,nitrogen,phosphorus and potassium from rice straw with 0-20 cm burial depth successively decreased from Southwest Guangxi to Northern Guangxi with increase of latitude on the whole.The release rate of carbon,nitrogen,phosphorus and potassium from rice straw with 0-20 cm burial depth in Shangsi was 78.4%,82.6%,80.8%and 80.5%.[Conclusion]There is a significant regional difference in nutrient release characteristics of rice straw among different rice-growing regions of Guangxi and the nutrient release characteristics of rice straw is mainly affected by climate and soil conditions.The nutrient release of rice straw in Southwestern,Central,and North-Central Guangxi rice-growing regions shows a decreasing trend with increase of burial depth,and the 0-5 cm burial depth treatment is beneficial to nutrient release of rice straw.The nutrient release rule of rice straw in Northern Guangxi(Liucheng)is of uniqueness due to its karst topography and relatively high soil pH,and 10-20 cm burial depth treatment is beneficial to decomposition and nutrient release of rice straw.关键词
水稻/埋深/秸秆腐解/养分释放/孔隙度/微生物活性/碳氮循环/广西Key words
rice/burial depth/straw decomposition/nutrient release/porosity/microbial activity/carbon-nitrogen cycle/Guangxi分类
农业科技引用本文复制引用
苏莹莹,黎晓峰,谢志凤,王妙玲,刘文奇,杨钙仁..埋深对广西不同稻区水稻秸秆养分释放特征的影响[J].贵州农业科学,2026,54(1):30-37,8.基金项目
2024年广西农业科技自筹经费项目(Z2024123) （Z2024123）
广西重点研发计划项目(桂科AB22080103) （桂科AB22080103）
广西农业生态与资源保护站监测项目(202201340) （202201340）
