选取豫中烟区土壤氯含量较高(25.00 mg/kg)和较低(8.52 mg/kg)的2块烟田,以中烟100为供试品种,研究了烤烟氯吸收积累规律和烟田土壤氯素平衡情况.结果表明:打顶期烟叶氯含量最高,高、低氯烟田烟叶氯含量分别为1.108％、0.382％；烟株氯积累量随烟株生长不断增加,旺长期是烟株大量吸收积累氯的关键时期,至采收结束高氯烟田烟叶和烟茎的氯积累量分别是低氯烟田的1.77倍和1.36倍；土壤氯含量高的地块烟株氯含量及吸收积累量高,但在土壤氯含量25.00mg/kg,灌溉水氯含量10.36 mg/kg,旺长期灌水1 800 m3/hm2情况下,烤后烟叶氯含量低于0.8％；在烟叶当季不施用氯肥情况下,烟株携出氯使得氯输出大于输入,土壤氯含量降低,因此控制氯源是解决土壤氯和烟叶氯含量高的重要措施.%The chlorine amount and soil chlorine balance of flue-cured tobaccos, Zhongyan 100, were studied in the field with high and low chlorine levels in central Henan province. The results indicated that the chlorine content of tobacco leaves was highest in the topping period, 1. 108% under high soil chlorine content field, and 0. 382% under low soil chlorine content field, respectively. The chlorine amount of tobaccos increased with its growth,and the bloom period was the key period of flue-cured tobacco plants,absorbing and accumulating chlorine. The tobacco leaf and stem under high soil chlorine concentrations accumulated 1. 77 times and 1. 36 times of chlorine content as much as that under low soil chlorine concentrations at the end of harvest. High soil chlorine content conferred high tobacco chlorine content,but in the condition of the soil chlorine content 25. 00 mg/kg and irrigation 1 800 m3/ha at vigorous growing stages (water chlorine content 10. 36 mg/kg),the chlorine content of flue-cured tobacco leaves was less than 0. 8%. Additionally, the chlorine output was beyond its chlorine input and the soil chlorine content fell with-out chloride-bearing fertilizers application in tobacco fields, suggesting controlling extra chlorineis the important measure to reduce the chlorine content in soils and tobacco leaves.
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