| 引用本文: | 文 凤,邱晨雨,肖 然,等.碳基材料对紫色土水热盐的调控及其气温响应[J].灌溉排水学报,2026,45(5):79-86. |
| WEN Feng,QIU Chenyu,XIAO Ran,et al.碳基材料对紫色土水热盐的调控及其气温响应[J].灌溉排水学报,2026,45(5):79-86. |
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| 摘要: |
| 【目的】探究碳基材料对紫色土水热盐的调控及其气温响应。【方法】采用常温与高温2种气温条件的盆栽试验，设置对照组（CK）、复合肥（NPK）、生物炭（BC）、水热炭（HC）4种材料处理，共计8个处理，探究碳基材料及气温条件对紫色土持水特性、土壤温度和盐分变化的影响。【结果】①与CK相比较，生物炭和水热炭的添加能增加土壤大孔隙和小孔隙；复合肥对土壤孔隙结构无显著影响。②碳基材料均能显著增强土壤持水能力，其中生物炭效果最突出。高温条件下，NPK、BC、HC处理土壤饱和含水率较CK分别提高5.46%、74.06%、14.93%。③与CK相比，BC、HC处理显著提高了土壤电导率，并减轻了气温对土壤水盐相互作用及协同迁移的胁迫。【结论】添加碳基材料，特别是生物炭，通过优化土壤孔隙结构和水-热-盐耦合关系，显著提升了紫色土的持水能力和对高温胁迫的缓冲能力，是应对西南伏旱天气、实现紫色土坡耕地水分高效利用的有效措施。 |
| 关键词: 紫色土；碳基材料；持水特性；土壤温度；土壤盐分 |
| DOI：10.13522/j.cnki.ggps.2025243 |
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| Effects of carbon-based materials on water-heat-salt dynamics in purple soil under high temperature conditions |
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WEN Feng, QIU Chenyu, XIAO Ran, LIANG Tao, MA Lihua
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1. College of Resources and Environment, Southwest University, Chongqing 400715, China;
2. Chongqing Academy of Agricultural Sciences, Chongqing 401329, China
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| Abstract: |
| 【Objective】Purple soil in Southwest China is characterized by low water-holding capacity and high susceptibility to drought and temperature fluctuations. This paper experimentally investigates the effect of applying carbon-based materials on soil water-heat-salt dynamics and their associated responses to temperature variation.【Method】The experiment was conducted in pots under both normal and high-temperature conditions, each with four treatments: control (CK), application of compound fertilizer (NPK), biochar (BC), and hydrothermal carbon (HC). During the experiment, we measured the changes in soil water-holding capacity, soil temperature, and soil salinity for each treatment.【Result】①Compared with CK, the addition of biochar and hydrothermal carbon increased both macro- and micro-pores in the soil, whereas compound fertilizer had no significant effect on soil pore structure. ②Applying carbon-based materials significantly enhanced soil water-holding capacity, with biochar showing the most pronounced improvement. Under high-temperature condition, compared with CK, amending soil with NPK, BC, and HC increased saturated soil water content by 5.46%, 74.06% and 14.93%, respectively. ③In addition, BC and HC treatments significantly increased soil electrical conductivity (EC) and mitigated the adverse effects of high temperature on the interaction and coupled migration of soil water and salt.【Conclusion】Applying carbon-based materials, particularly biochar, optimizes soil pore structure and regulates water-heat-salt interactions, thereby effectively improving soil water-holding capacity and enhancing the buffering capacity of soil against temperature stress. This is an effective strategy for mitigating the detrimental effects of summer drought on soil properties and improving water use efficiency in sloped purple soil farmland in Southern China. |
| Key words: purple soil; Carbon-based materials; water-holding capacity; soil temperature; soil salinity |
