不同施肥处理对烟草土壤养分流失的影响

Effects of Different Fertilizer Treatments on Nutrient Leaching Loss in Tobacco Soil

为减少土壤养分流失,保护生态环境提供参考依据,通过盆栽种植烤烟并收集测定土壤淋溶液全氮、全钾养分浓度,土壤速效养分含量,进行了不同施肥处理对氮钾养分流失的影响试验。结果表明:在降雨条件下,基追肥分开施入土壤全氮、全钾养分的流失量较少,且土壤速效养分含量较高;施肥越多,养分流失越多。养分流失对土壤速效钾的影响十分微小。

The effects of different fertilization treatments on nitrogen（N） and potassium（K） nutrition losses were studied by using pot experiment and soil leakage solution testing to provide a reference for protecting soil nutrient and ecological environment. The tests indicated that topdressing fertilization which was separately applied to the soil counteracted nutrient losses under the conditions of rainfall. Moreover, the soil available nutrients were rich. Obviously, the amount of nutrient loss was mainly influenced by fertilizer application, the high rate of fertilizer was susceptible to nutrient losses. But nutrient losses had little influence on soil available potassium content.