烤烟测土施肥技术的应用

应用养分平衡计算公式,根据试验得出测土施肥参数,即辽宁省宽甸县生产100kg烟叶吸收N2.64kg、P2O50.62 kg、K2O2.89kg;土壤有效氨当年利用率25.5%,有效磷24%,有效钾31%;氮肥当年利用率50.1%,磷肥利用率13.3%,钾肥利用率29%。通过田间适宜的施氮量试验验证,结果表明,烤烟生产中根据土壤有效养分含量进行测土施肥技术可以推广应用。

Applying Fertilizer based on Soil Test for Flue-cured Tobacco

The parameters of applying fertilizer based on soil test were calculated through the trials and the nutrition balance formulas.The leaves produced in Kuandian absorbed 2.64 kg N,0.62 kg P2O5 and 2.89 kg K2O per 100 kg,the utilization rater of soil available nitrogen,phosphorus and potassium were 25.5%,24%and 31% respectively,the utilization rates of nitrogenous fertilizer,phosphate fertilizer and potash fertilizer were 50.1%,13.3% and 29%,respectively.The field trials with moderate nitrogen fertilizer level testified that applying fertilizer based on soil test is worthy of extending in flue-cured tobacco production.