| 王祺蕊,杨春怀,李永梅,王婷,李琬婷,赵吉霞.间作对坡耕地红壤呼吸速率的影响[J].农业环境科学学报,2025,44(5):1409-1418. |
| 间作对坡耕地红壤呼吸速率的影响 |
| Effects of intercropping on respiration rate of red soil in sloping farmland |
| 投稿时间：2024-05-22 |
| DOI：10.11654/jaes.2024-0430 |
| 中文关键词: 间作 土壤呼吸速率 土壤温度 土壤含水量 微生物量碳 微生物量氮 |
| 英文关键词: intercropping soil respiration rate soil temperature soil moisture content microbial biomass carbon microbial biomass nitrogen |
| 基金项目:国家重点研发计划项目（2022YFD1901500，2022YFD1901501，2022YFD1901502） |
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| 中文摘要: |
| 为探究坡耕地红壤区间作对土壤呼吸速率及土壤微生物量碳、氮的影响，通过田间试验，以坡耕地红壤为研究对象，设置大豆单作（MS）、玉米单作（MM）、玉米大豆间作（IMS）和裸地（CK）4个处理，研究不同种植模式对土壤呼吸速率的影响特征及相关土壤环境因子的影响机制。结果表明：在玉米生育期内，各种植模式下的土壤呼吸速率、温度和含水量均呈现先增加后降低的单峰型变化趋势，MS、MM、IMS和CK 4种处理下的土壤呼吸速率变化范围分别为2.50~5.71、2.74~6.24、2.34~5.33 μmol·m-2·s-1和2.12~5.11 μmol·m-2·s-1；且间作处理下的土壤呼吸速率整体较其他处理低，IMS处理下的土壤碳排放总量较MS、MM处理显著降低了7.55%、14.65%。土壤呼吸速率与土壤温度和含水量均呈显著正相关，分别解释了87.4%~97.0%和78.7%~89.5%的土壤呼吸速率变化，且相较于单一因素模型，双因素模型（土壤温度与土壤含水量）能够更好地解释土壤呼吸速率的变化。间作通过显著提高土壤微生物量碳和土壤微生物量氮的含量，而进一步影响土壤呼吸速率，在玉米生育期内不同种植模式下土壤微生物量碳、氮含量与土壤呼吸存在显著的线性正相关。研究表明，合理的间作模式能降低土壤呼吸速率，减少土壤碳排放。 |
| 英文摘要: |
| To investigate the impacts of intercropping of red soil on soil respiration rate and soil microbial biomass carbon and nitrogen in sloping farmland. Through field experiments, taking red soil on sloping farmland as the research object, four treatments including soybean monoculture（MS）, maize monoculture（MM）, maize soybean intercropping（IMS）, and bare soil（CK）were set up to study the influence characteristics of different planting modes on soil respiration rate and the impact mechanism of related soil environmental factors. During the growth period of maize, the soil respiration rate, temperature, and moisture content under each planting mode show a unimodal trend of first increasing and then decreasing. The range of soil respiration changes under MS, MM, IMS, and CK treatments is 2.50-5.71, 2.74- 6.24, 2.34-5.33 μmol·m-2·s-1, 2.12-5.11 μmol·m-2·s-1, respectively; The overall soil respiration under intercropping treatment was lower than other treatments, and the total soil carbon emissions under IMS treatment were significantly reduced by 7.55% and 14.65% compared to MS and MM treatments.The soil respiration rate exhibits a strong positive correlation with soil temperature and moisture content, accounting for 87.4% to 97.0% and 78.7% to 89.5% of its variation, respectively. Compared with the single factor model, the two factor model（soil temperature and soil moisture content）can better explain the changes in soil respiration rate. Intercropping substantially elevates soil microbial biomass carbon and nitrogen levels, which subsequently exerts a notable impact on soil respiration rates. During the maize growth period, a notable linear positive relationship exists between soil microbial biomass carbon and nitrogen content, as well as soil respiration, across various planting modes. Studies show that reasonable intercropping mode can reduce soil respiration rate and soil carbon emission. |
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