夏玉米高产规律的研究 Ⅳ.高产玉米的肥料效应

本研究采用通用旋转设计法,以氮、磷、钾用量为供试因子,玉米产量和净产值为目标函数,分析了高产玉米的肥料效应,用计算机模拟出夏玉米亩产≥900公斤的一套高产、低成本施肥方案:亩施纯氮(N)30.77～31.80公斤,纯磷(P_2O_5)10.46～10.77公斤,纯钾(K_2O)28.26～29.59公斤。

STUDIES ON HIGH-YIELD REGULARITY OF SUMMER MAIZE Ⅳ. RESPONSE OF HIGH-YIELD MAIZE TO FERTILIZER

The general rotation design was used to analyze the response of high-yield maize to fertilizre with applied rates of N,P_2O_5 and K_2O as test factors,yield and profits of maize as target functions.A fertilization schedule for summer maize to,get high yield with lowest input was modeled by a computor,i.e.,to gain a yield more than 13500kg/ha should only supply N 461.55—477.00,P_2O_5 156.90—161.55 and K_2O 423.90—443.85kg in active ingredient per hectare.