豫中褐土烟区烤烟氮磷钾施肥模型研究

为了获取烤烟平衡施肥模型所需的主要参数,并建立土壤碱解氮、速效磷、速效钾含量和校正系数间的函数关系。2007—2010年在平顶山市郏县选择有代表性的烟田开展试验,结果表明,土壤养分测定值与其校正系数之间以幂函数曲线相关最佳,各养分的校正系数均随其含量增加而降低,并利用所获取的参数初步构建了豫中褐土烟区烤烟氮、磷、钾的推荐施肥模型。

Study on Recommendation Fertilization Models for Nitrogen,Phosphorus and Potassium in brown soil area of Center Henan

To determine the parameters of recommendation fertilization models for flue-cured tobacco, field experiments were studied in Jia County of Pingdingshan during 2007 to 2010. Results showed that the best relationship between soil nutrients and rectified coefficients were power function. With the increase of soil nutrients, the rectified coefficients decreased. The models for nitrogen, phosphorus and potassium fertilizers recommendation were established using the obtained parameters based on four years＇ field experiments.