夏玉米氮肥减量化配套栽培技术研究

Study on the supporting cultivation techniques for nitrogen reduce in corn

采用"3414"试验设计,在中高肥力条件下,对夏玉米氮肥减量化配套栽培技术进行了研究。结果表明,获得最高产量的农艺措施为N 206.04～237.96 kg/hm2、K2O 109.57～129.44 kg/hm2、种植密度69 270.0～71 479.5株/hm2。获得最高净产值的农艺措施为N132.32～171.20 kg/hm2、K2O 86.11～108.01 kg/hm2、种植密度70 916.3～73 127.3株/hm2。氮肥适当减少用量的情况下,通过提高密度,可以实现高产、高效的目标。

The supporting cultivation techniques for nitrogen reduce in corn,grown in medium-high fertile soil,was studied with ＇3414＇ experimental design.The result showed that,the supporting techniques for the highest corn yield were that the rates of nitrogen and potassium were 206.04～237.96,109.57～129.44 kg/hm2,and density was 70 916.3～73 127.3 plants/hm2;The supporting techniques for the optimal corn yield were that the rates of nitrogen,potassium were 132.32～171.20,86.11～108.01 kg/hm2,and density was 70 916.3～73 127.3 plants/hm2.Decreasing the rate of nitrogen moderately,increasing the density of corn,the high-yielding high-benefit objection could be realized.