Study on effect of enhancing yield of winter wheat by applying two kinds of controlled release nitrogen fertilizer

A barrel experiment of applying two kinds of controlled release nitrogen fertilizer(CRNF)on winter wheat was carried out.The results show that the winter wheat yield and apparent N recovery are improved or elevated under the same irrigation conditions and the same quantity of nitrogen．The apparent N recoveries are increased by 5％～lO％ and l3％～26％ respectively．The total dry weight and the length of winter wheat root under different treatments of controlled release nitrogen fertilizer are affected significantly，and they are in the order of normal urea treatment(F₁) < controlled release nitrogen fertilizer of Lexishi(F₂) < controlled release nitrogen fertilizer of Zhongpin(F ₃),Although the total consumptions of different treatments of soil water are close to that of urea treatment，the water use efficiencies of controlled release nitrogen fertilizer treatments are always higher with the order of F₁ < F₂ < F₃.