华北农学报 ›› 2023, Vol. 38 ›› Issue (S1): 331-338. doi: 10.7668/hbnxb.20194109

所属专题: 水稻 土壤肥料

• 资源环境·植物保护 • 上一篇    下一篇

多熟复种模式提高南方稻田土壤团聚体稳定性以及有机碳含量

张玮1,2, 周梦瑶1,2, 张乐妍1,2, 熊瑞1,2, 郭慧娟1,2, 徐莹1,2, 傅志强1,2, 龙攀1,2   

  1. 1 湖南农业大学 农学院,湖南 长沙 410128
    2 作物生理与分子生物学教育部重点实验室,湖南 长沙 410128
  • 收稿日期:2023-08-10 出版日期:2023-12-28
  • 通讯作者:
    龙 攀(1985—),女,湖南湘乡人,讲师,博士,主要从事稻田耕作制度方面的研究。
  • 作者简介:

    张 玮(2000—),男,湖南衡阳人,在读硕士,主要从事稻田生理与生态研究。

  • 基金资助:
    湖南省教育厅重点科研项目(20A256); 国家自然科学基金项目(31501277)

Improving the Stability of Soil Aggregates and the Content of Organic Carbon in Paddy Fields in Southern China by Multiple Cropping Mode

ZHANG Wei1,2, ZHOU Mengyao1,2, ZHANG Leyan1,2, XIONG Rui1,2, GUO Huijuan1,2, XU Ying1,2, FU Zhiqiang1,2, LONG Pan1,2   

  1. 1 College of Agronomy,Hunan Agricultural University,Changsha 410128,China
    2 Key Laboratory of Crop Physiology and Molecular Biology,Changsha 410128,China
  • Received:2023-08-10 Published:2023-12-28

摘要:

为探究长期不同多熟复种模式对稻田土壤结构及有机碳分布的影响。以空闲-早稻-晚稻(WF-R-R)模式为对照,设置油菜-早稻-晚稻(RP-R-R)、紫云英-早稻-晚稻(MV-R-R)、马铃薯-早稻-晚稻(PO-R-R)、黑麦草-早稻-晚稻(RG-R-R)4种多熟模式。结果表明,在5~10 cm土层,多熟模式均增加了>2 mm粒级水稳性团聚体含量;其中,RG-R-R模式比对照显著高11.26百分点,平均重量直径(MWD)显著高于对照。在0~5 cm土层中,多熟模式均提高了有机碳含量;在0~20 cm土层中RG-R-R模式SOC含量最高,在各土层中的SOC含量较对照分别增加9.57% (0~5 cm),4.45% (5~10 cm),5.96% (10~20 cm)。随着土层加深以及团聚体粒级下降,多熟模式模式下土壤有机碳含量较对照增加的越明显,在<0.053mm粒级下,RG-R-R模式的土壤有机碳含量显著高于对照。土壤团聚体有机碳的贡献率主要来自>2 mm粒级(59.03%~79.33%),在5~10 cm土层中,其中RP-R-R、MV-R-R、PO-R-R、RG-R-R模式的>2 mm粒级中团聚体碳的贡献率较对照显著提高了5.48,8.50,7.18,14.65百分点。综上,在本研究中,采用黑麦草-早稻-晚稻(RG-R-R)模式有利于南方稻田土壤团聚体稳定和有机碳的固定。

关键词: 稻田, 冬种绿肥, 多熟复种模式, 土壤团聚体, 土壤有机碳

Abstract:

To explore the effects of long-term multi-cropping patterns on soil structure and organic carbon distribution in paddy fields. With fallow-rice-rice (WF-R-R) model as the control, four multi-cropping models were set up: rape-rice-ric (RP-R-R), Chinese milk vetch-rice-rice (MV-R-R), Potato-rice-rice (PO-R-R), ryegrass-rice-rice (RG-R-R). The results showed that in 5—10 cm soil layer, the contents of water-stable aggregates with size of >2 mm were increased in the multi-cropping pattern. The RG-R-R mode was 11.26 percentage points higher than the control, and the mean weight diameter (MWD) was significantly higher than the control. In 0—5 cm soil layer, the organic carbon content was increased by multi-cropping mode. The SOC content in RG-R-R mode was the highest in 0—20 cm soil layer, and the SOC content in each soil layer was increased by 9.57% (0—5 cm), 4.45% (5—10 cm) and 5.96% (10—20 cm), respectively, compared with the control. With the deepening of soil layer and the decrease of aggregate particle size, the soil organic carbon content in the multi-cropping model increased more significantly than that in the control. When the size was <0.053 mm, the soil organic carbon content in the RG-R-R model was significantly higher than that in the control. The contribution rate of soil aggregate organic carbon mainly came from the >2 mm grain size (59.03%—79.33%). In the 5—10 cm soil layer, the contribution rate of aggregate carbon in the >2 mm size of MV-R-R, PO-R-R and RG-R-R models was significantly increased by 8.5, 7.18 and 14.65 percentage points compared with the control. In conclusion, in this study, the ryegrass-rice-rice (RG-R-R) model was conducive to soil aggregate stability and organic carbon fixation in southern paddy fields.

Key words: Paddy field, Planting green manure in winter, Multiple cropping model, Soil aggregates, Soil organic carbon

引用本文

张玮, 周梦瑶, 张乐妍, 熊瑞, 郭慧娟, 徐莹, 傅志强, 龙攀. 多熟复种模式提高南方稻田土壤团聚体稳定性以及有机碳含量[J]. 华北农学报, 2023, 38(S1): 331-338. doi: 10.7668/hbnxb.20194109.

ZHANG Wei, ZHOU Mengyao, ZHANG Leyan, XIONG Rui, GUO Huijuan, XU Ying, FU Zhiqiang, LONG Pan. Improving the Stability of Soil Aggregates and the Content of Organic Carbon in Paddy Fields in Southern China by Multiple Cropping Mode[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(S1): 331-338. doi: 10.7668/hbnxb.20194109.

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