摘要： 以先玉335玉米为试材,以超高产为目标,设5个施肥处理,研究了不同氮、钾肥运筹对超高产玉米干物质积累和产量的影响。结果表明:不同氮、钾肥运筹对超高产玉米干物质和产量的影响差异显著。底肥施尿素150kg/hm2、硫酸钾56.25 kg/hm2,追肥施尿素450 kg/hm2、硫酸钾168.75 kg/hm2的运筹方式对超高产玉米干物质的积累最有利;以底肥施尿素300 kg/hm2、硫酸钾112.5 kg/hm2,追肥施尿素300 kg/hm2、硫酸钾112.5 kg/hm2的运筹方式下的产量和经济系数最高,分别为17246.85 kg/hm2和0.52。

关键词: 超高产玉米, 氮、钾肥运筹, 干物质积累, 产量

Abstract: Take Xianyu 335 as tries the material and yield of super high -yield as the goal,effect of different nitrogenand potassium fertilizer operation on dry weight and yield of maize was studied.The results showed that :the dry materialand yield was influenced strikingly in different nitrogen and potassium fertilizer operation,the base between nitrogenousfertilizer 150 kg/ha and potassium fertilizer 56.25 kg/ha,the topdressing between nitrogenous fertilizer 450 kg/haand the potassium fertilizer 168.75 kg/ha was advantageous to the dry material accumulate ;The base between nitrogenousfertilizer 300 kg/ha and potassium fertilizer 112.5 kg/ha,the topdressing between nitrogenous fertilizer 300 kg/ha andpotassium fertilizer 112.5 kg/ha operation way yield and the economical coefficient was highest,respectively was17 246.85 kg/ha and 0.52.

Key words: Superhigh-yieldmaize, Nitrogenandpotassiumfertilizeroperation, Drymatteraccumulation, Yield

中图分类号: 

• S143