矿物基土壤调理剂对烟草土壤修复的效果

Effect of Mineral-based Soil Conditioners on Soil Remediation of Tobacco

以矿物基土壤调理剂为核心,配合其他农艺措施对烟草土壤进行重金属污染修复与土壤改良,研究不同修复模式对烟草种植的影响。结果表明,矿物基土壤调理剂能有效改良土壤理化性质,土壤pH在一定程度得到提高,处理①(7500 kg/hm^(2)矿物基土壤调理剂)和处理③(7500 kg/hm^(2)矿物基土壤调理剂+有机硅)的模式能很大程度改善土壤理化性质,处理②(7500 kg/hm^(2)矿物基土壤调理剂+深翻耕)和处理④(7500 kg/hm^(2)矿物基土壤调理剂+有机硅+深翻耕)在加上深翻耕操作后,土壤水解性氮、有效磷、速效钾和有机质含量都大幅度降低;同时矿物基土壤调理剂能有效降低土壤重金属含量,其中对镉最明显。处理②综合表现最好,上、中、下部叶重金属大部分均有效降低,利用该技术模式能有效改良烟田土壤、改善烟叶品质和提高烟叶产量,适合后续推广应用。

Taking mineral-based soil conditioners as the core,combined with other agronomic measures,heavy metal pollution remediation and soil improvement in tobacco soil were carried out,and the effects of different remediation modes on tobacco planting were studied.The results showed that the mineral-based soil conditioner could effectively improve the physical and chemical properties of the soil,and the soil pH was increased to a certain extent.Treatment①(7500 kg/hm^(2) mineral-based soil conditioner)and treatment③(7500 kg/hm^(2) mineral-based soil conditioner+organosilicon)could greatly improve soil physical and chemical properties.Treatment②(7500 kg/hm^(2) mineral-based soil conditioner+deep ploughing)and treatment④(7500 kg/hm^(2) mineral-based soil conditioner+organosilicon+deep ploughing)after adding deep ploughing,the soil hydrolyzability nitrogen,available phosphorus,available potassium and organic matter content were greatly reduced;at the same time,the mineral-based soil conditioner could effectively reduce the content of heavy metals in the soil,among which cadmium was the most obvious.Treatment②had the best comprehensive performance,and most of the heavy metals in the upper,middle and lower leaves were effectively reduced.The use of this technology model could effectively improve the soil of tobacco fields,improve the quality of tobacco leaves and increase the yield of tobacco leaves,which was suitable for subsequent promotion and application.