【摘要】 采取长期定位的研究方法,研究了氮、磷、钾、麦秸覆盖还田和种植密度对青岛市冬小麦—夏玉米栽培系统中夏玉米的产量、净产值和土壤肥力的影响,获得了五因素与产量、净产值、土壤有机质、碱解氮、有效磷、速效钾含量的模拟回归方程,最终建立了青岛市夏玉米减氮减磷、增钾增密的栽培技术体系。更多还原

【Abstract】 The long-term positioning method was adopted to study the effects of nitrogen,phosphorus,potassium,wheat straw mulching and plant density on the yield and net output of summer corn and soil fertility in wheat-corn cultivation system in Qingdao area.The regression equations between the five factors and corn yield,net output and the contents of soil organic matter,alkali-hydrolyzable nitrogen,available phosphorus and available potassium were obtained.Based on the results,the cultivation technique system for summer maize was established with the reduced nitrogen and phosphorus and increased potassium and plant density in Qingdao City.更多还原