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当前位置: 首页 > 文章 > 湘中烟稻轮作区2种水稻土团聚体稳定性及有机碳组分比较研究 农学学报 2024,14 (3) 48-52
Position: Home > Articles > Comparative Study of Aggregate Stability and Organic Carbon Fraction in Two Types of Paddy Soils under Tobacco-rice Rotation in Central Hunan Journal of Agriculture 2024,14 (3) 48-52

湘中烟稻轮作区2种水稻土团聚体稳定性及有机碳组分比较研究

作  者：
陆峰;何结望;肖志鹏;唐剑宁;马明云;夏凡;龙飞;肖孟宇;钱传林
单  位：
关键词：
烟稻轮作;水稻土;团聚体;有机碳
摘  要：
选择湘中烟稻轮作区2种典型水稻土,比较分析了土壤团聚体分布及其稳定性、有机碳组分及其相关关系,旨在揭示烟稻轮作的2种土壤团聚体稳定性的差异及有机碳的影响.结果表明:红壤性水稻土(RPS)>0.25 mm大团聚体含量、团聚体平均质量直径(MWD)和几何平均直径(GMD)显著高于紫色水稻土(PPS),分形维数(D)则较小,因此烟稻轮作的红壤性水稻结构及团聚体稳定性显著好于PPS;RPS总有机碳(TOC)及颗粒有机碳(POC)含量均显著高于PPS,而易氧化有机碳(EOC)含量变化不明显;RPS和PPS的MWD及GMD均与TOC、EOC和POC呈显著正相关关系,D则与前者呈显著负相关;>0.25 mm团聚体含量虽均与TOC、EOC和POC呈显著正相关关系,但RPS有机碳对>0.25 mm团聚体影响大于PPS,且2种土壤的POC对>0.25 mm团聚体的影响均大于EOC.在培育烟稻轮作的RPS和PPS团聚体和改善其结构中,需提高土壤有机碳及活性有机碳组分含量.
译  名：
Comparative Study of Aggregate Stability and Organic Carbon Fraction in Two Types of Paddy Soils under Tobacco-rice Rotation in Central Hunan
关键词：
rice-tobacco rotation%paddy soil%aggregates%organic carbon
摘  要：
To reveal the difference in the stability of soil aggregates and the effect of organic carbon in two typical paddy soils with the farming mode of tobacco-rice rotation,the distribution and stability of soil aggregates,the content of organic carbon components and their relationships in two typical paddy soils were studied,sampled from the field of tobacco-rice rotation region in central Hunan Province.The results showed that the content of>0.25 mm aggregates,mean weight diameter of aggregates(MWD)and geometric mean diameter(GMD)of red paddy soil(RPS)were higher than those of purple paddy soil(PPS),but its fractal dimension(D)was lower,indicating that soil structure and aggregate stability of RPS was better than those of PPS;meanwhile,content of total organic carbon(TOC)and particulate organic carbon(POC)in RPS was significantly higher than those in PPS,but there was no significant difference in content of easily oxidized organic carbon(EOC)between RPS and PPS;the MWD and GMD of RPS and PPS were significantly positively correlated with TOC,EOC and POC,while D showed significant negative correlation;although the content of>0.25 mm aggregates in two types of soil were significantly positively correlated with TOC,EOC and POC,but the influence of organic carbon on>0.25 mm aggregates of RPS was greater than those of PPS.Meanwhile,the influence of POC on>0.25 mm aggregates in two types of soil was greater than that of EOC.To cultivate aggregates and improve structure of RPS and PPS with the farming mode of tobacco-rice rotation,the content of soil organic carbon and its fractions should be increased.

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