Effects of Different Fertilizers on Yield and Plant Nutrient Accumulation of High-yield Summer Maize

A field experiment was conducted to study the soil nutrient limiting factors and plant nutrient uptake and accumulation.The results showed that the yield of the treatment with fertilizers were increased observably,the in-crease rate was from 7.3% to 15.9%.The OPT treatment got the highest yield with 12 051.2 kg/ha,with yield in-creased 1 651.2 kg/ha.The nitrogen and potassium fertilizer could increase yield of high-yield summer maize evi-dently;N and K were chief soil nutrient limiting factors.The accumulations of nitrogen,phosphorus and potassium of high-yield maize plants were increased with the extended of bearing period.The order of nutrients accumulation was N K P.It was the greatest period of nitrogen,phosphorus and potassium absorption amount and d rate from jointing stage to the large bugle stage,the N,P and K nutrients were absorbed at the whole stage.Under the conditions of rec-ommended fertilization(OPT),the increasing yield per kg nutrient of N,P2O5,K2O were 3.73,5.20,6.76 kg,the recov-ery rate of N,P2O5,K2O were 18.05%,14.55%,18.34%,and the absorbed nutrient with 100 kilogram maize of N,P2O5,K2O were 1.62 kilogram,0.69 kilogram and 1.83 kilogram.