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草业学报 ›› 2024, Vol. 33 ›› Issue (5): 80-91.DOI: 10.11686/cyxb2023229

• 研究论文 • 上一篇    下一篇

高温条件对不同耕作模式紫色水稻土水、热、盐的影响

尹仲毅1(), 马黎华1,2(), 李兆磊1,2, 冯桦1,2, 蒋先军1()   

  1. 1.西南大学资源环境学院,重庆 400715
    2.西南大学长江经济带农业绿色发展研究中心,重庆 400716
  • 收稿日期:2023-07-04 修回日期:2023-08-11 出版日期:2024-05-20 发布日期:2024-02-03
  • 通讯作者: 马黎华,蒋先军
  • 作者简介:jiangxj@swu.edu.cn
    E-mail: malh@swu.edu.cn
    尹仲毅(1996-),男,河北石家庄人,硕士。E-mail: 969162650@qq.com
  • 基金资助:
    国家自然科学基金项目(42077035);国家重点研发计划(2016YFD0300901);四川省区域创新合作基金(22QYCX0073)

Impact of high temperature on soil water, heat and salt in purple paddy fields under different tillage patterns

Zhong-yi YIN1(), Li-hua MA1,2(), Zhao-lei LI1,2, Hua FENG1,2, Xian-jun JIANG1()   

  1. 1.College of Resources and Environment,Southwest University,Chongqing 400715,China
    2.Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin,Southwest University,Chongqing 400716,China
  • Received:2023-07-04 Revised:2023-08-11 Online:2024-05-20 Published:2024-02-03
  • Contact: Li-hua MA,Xian-jun JIANG

摘要:

近年来,西南地区高温天气频发,高温带来稻田土壤温度的升高,进而带来稻田生境的改变。为了探究高温条件对紫色水稻土壤水、热、盐的影响,以及不同耕作模式下稻田对高温的应对策略,选取垄作(RT)、水旱平作(CT)、冬水田(FPF)3种耕作模式,针对不同耕作模式下0~10 cm、10~20 cm、20~40 cm、40~60 cm,4个土层的土壤温度、土壤含水率和土壤电导率进行了连续两年(2021-2022年)的原位监测。结果表明:在常温条件下,3种耕作模式0~40 cm土层的土壤温度无显著差异(P>0.05),土壤含水率与土壤电导率存在显著差异;在高温条件下,3种耕作模式土壤温度与土壤含水率在4个土层中均差异显著(P<0.05),土壤温度与土壤含水率均为RT>FPF>CT,土壤电导率为CT>FPF>RT。常温与高温条件下,3种耕作模式的土壤温度与电导率均呈显著正相关关系。高温会导致土壤温度,土壤电导率和土壤含水率耦合关系的改变。高温条件下,垄作稻田的土壤含水率最高,土壤电导率最低,体现了对高温条件更好的适应性。

关键词: 高温, 垄作, 土壤温度, 土壤含水率, 土壤电导率

Abstract:

High-temperature events occurred more frequent in recent years than before in southwest China. The high temperature increases the soil temperature in paddy fields, and this has affected the paddy fields habitat. The aim of this study, therefore, was to explore the impact of high temperature on soil water, heat, and salt in purple paddy fields, and to compare the responses of paddy fields with different tillage patterns to high temperature. Three tillage patterns including ridge tillage (RT), conventional paddy-upland rotation tillage (CT), and flooded paddy field (FPF) were selected to carry out this study. The soil temperature, soil water content, and soil conductivity were monitored in 0-10 cm, 10-20 cm, 20-40 cm, and 40-60 cm soil horizons in 2021 and 2022. It was found that there was no significant difference among the three different tillage patterns in soil temperature (P>0.05) in the 0-40 cm soil horizon under the non-high-temperature conditions, but there were significant differences in soil water content and soil conductivity. Under high-temperature conditions, soil temperature and soil water content differed significantly among the four soil horizons (P<0.05) and among the three different tillage patterns in paddy fields. The tillage patterns were ranked, from highest soil temperature and soil water content to lowest, as follows: RT>FPF>CT, and from highest soil conductivity to lowest as follows: CT>FPF>RT. Under both non-high-temperature conditions and high-temperature conditions, the soil temperature and soil conductivity were significantly positively correlated under all three tillage patterns. Our results showed that high temperature affected the relationships among soil temperature, soil conductivity, and soil water content. Under high-temperature conditions, the highest soil water content and lowest soil conductivity were in the RT paddy field, indicating that ridge tillage results in better adaptability of paddy fields to high-temperature conditions.

Key words: high temperature, ridge tillage, soil temperature, soil water content, soil conductivity