水肥一体化对烤烟叶片氯含量及烟田土壤氯离子迁移的影响

Effects of water and fertilizer integration model on chlorine absorption in flue-cured tobacco and chloride migration in tobacco field soil

模拟水肥一体化滴灌条件下灌溉过程,在控制灌水的条件下测定水肥一体化和常规施肥2种施肥方式下烟叶烤后样中氯含量和钾含量,并测定水肥一体化试验地烟株根际0~60 cm土壤氯离子含量,分析水肥一体化滴灌模式对深度0~40 cm的农田土壤中氯离子运移的影响。结果表明:水肥一体化滴灌模式可显著降低烟叶氯含量,提高钾氯比,提高烟叶质量;同时水肥一体化模式可降低0~40 cm土层中氯离子含量,促使土壤中氯离子向下迁移,在较深的土层中聚积,从而降低植物根际土壤中氯离子含量,减轻烤烟的氯危害。

Using drip irrigation to simulate the drip irrigation process under the condition of integrated water-fertilizer drip irrigation with controled irrigation conditions, the chlorine and potassium contents in tobacco leaves after flue-curing under the condition of integrated water-fertilizer and conventional fertilization were measured, and the chloride content in 0-60 cm soil in the rhizosphere of tobacco plants in the experimental site of integrated water-fertilizer drip irrigation was determined, and the effects of integrated drip irrigation with water and fertilizer on chloride transport in farmland soils with depth of 0-40 cm were analyzed. The results showed that the integrated water-fertilizer drip irrigation model could significantly reduce the chlorine content of tobacco leaves, increase K/Cl ratio and improve the quality of tobacco leaves;at the same time, the integrated water-fertilizer model could reduce the chloride content in 0-40 cm soil layer, promote the chloride ion to migrate downward and accumulate in deeper soil layer, thus reduce the chloride content in Rhizosphere of plants, and alleviated the chlorine hazard of flue-cured tobacco.