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农学学报 ›› 2024, Vol. 14 ›› Issue (3): 48-52.doi: 10.11923/j.issn.2095-4050.casb2023-0063

• 土壤肥料 资源环境 生态 • 上一篇    下一篇

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

陆峰1(), 何结望1, 肖志鹏2, 唐剑宁1, 马明云2, 夏凡1, 龙飞1, 肖孟宇2, 钱传林1   

  1. 1 湖北中烟工业有限责任公司,武汉 430051
    2 湖南烟草公司衡阳市公司,湖南衡阳 421000
  • 收稿日期:2023-03-06 修回日期:2023-09-23 出版日期:2024-03-16 发布日期:2024-03-16
  • 作者简介:

    陆峰,男,1971年出生,江苏常州人,副主任研究员,学士,研究方向:土壤质量及烟叶基地管理工作。通信地址:430048 湖北省武汉市东西湖区金银湖办事处环湖路51号 湖北中烟工业有限责任公司武汉卷烟厂,Tel:027-85792219,E-mail:

  • 基金资助:
    湖北中烟工业有限责任公司项目“提高湖南烟叶配方适用性关键技术研究”(2021JSYL4WH2C015); 衡阳市烟草公司项目“湘南浓香型特色‘高油分+中棵烟’开发技术研究”(2021430481240008)

Comparative Study of Aggregate Stability and Organic Carbon Fraction in Two Types of Paddy Soils under Tobacco-rice Rotation in Central Hunan

LU Feng1(), HE Jiewang1, XIAO Zhipeng2, TANG Jianning1, MA Mingyun2, XIA Fan1, LONG Fei1, XIAO Mengyu2, QIAN Chuanlin1   

  1. 1 Hubei Tobacco Industry Co., Ltd., Wuhan 430051, Hubei, China
    2 Hengyang Tobacco Company of Hunan, Hengyang, 421000, Hunan, China
  • Received:2023-03-06 Revised:2023-09-23 Online:2024-03-16 Published:2024-03-16

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。

关键词: 烟稻轮作, 水稻土, 团聚体, 有机碳

Abstract:

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.

Key words: rice-tobacco rotation, paddy soil, aggregates, organic carbon