烟田土壤氯离子空间与时间动态变化规律及影响因素的研究
Study on the Spatial and Temporal Dynamic Change Patterns of Chloride Ions in Tobacco Field Soils and the Factors Affecting Them

氯离子含量对烟草品质指标有很大影响，我国部分烟区土壤氯离子含量较高，导致烟叶氯离子含量过高，严重影响烟叶品质。本试验在高密地区选择四个植烟地块，采集土壤、灌溉水样本并测定氯离子含量，分析土壤氯离子含量和降水量、灌溉水氯离子含量间的相关关系。结果表明土壤氯离子含量与降水量在较深土层(20~30 cm、30~40 cm)呈显著正相关，且随降水量不断增大，土壤中氯离子含量不断减少。但是对表层土的影响不显著(0~10 cm)；土壤氯离子含量变化量随降水升高而升高，随降水增加淋溶效果增加，土壤氯离子流失变快，土壤氯离子含量变化量随之上升。
Chloride ion content significantly influences tobacco quality indicators. High soil chloride ion content in certain tobacco-growing regions leads to elevated chloride ion levels in tobacco leaves, detrimentally impacting leaf quality. This study examined four high-density tobacco planting sites, analyzing soil and irrigation water samples to measure chloride ion content. The correlation between soil chloride ion content, precipitation, and irrigation water chloride ion content was investigated. Results revealed a significant positive correlation between soil chloride ion content and precipitation in deeper soil layers (20~30 cm, 30~40 cm), with soil chloride ion content decreasing as precipitation levels rise. Conversely, the impact on surface soil (0~10 cm) was not significant, with soil chloride ion content increasing with higher precipitation levels. Increased precipitation led to enhanced leaching effects, resulting in faster loss of soil chloride ions. Overall, soil chloride ion content rose with increasing precipitation.