【摘要】 研究了氮磷钾不同配施条件下,钾肥的效应及土壤钾素的变化,结果表明:玉米施用氮、钾肥有显著的增产作用,氮、钾对玉米的影响程度为:N>K,钾素的盈余随钾肥用量的增加而呈上升趋势,施用钾肥对抑制土壤钾素的下降作用明显。郑州潮土区建议施钾量(K2O)为112.5kg/hm2,驻马店砂姜黑土区建议施钾量(K2O)为150kg/hm2。更多还原

【Abstract】 The study showed effect of nitrogenous and potash fertilizer on yield of maize was significant. The effect level of nitrogenous and potash fertilizer to the yield and economic properties was N>K. The with increase of potassium fertilizer application rates, profit of potassium in soil will rise. Suggesting application rates of potassium fertilizer ought be K2O 112.5 kg/hm2 in zhengzhon Fluvo-aquic soil area and K2O 150 kg/hm2 in zhumadian shajiang black soil area.更多还原