【摘要】 青贮玉米是河北省粮改饲的主要目标作物,但河北省在青贮玉米种植过程中存在着产量低,灌水施肥不合理等问题。为制定合理的水肥管理措施,提高青贮玉米的产量和水氮利用效率,通过选取科玉188型青贮玉米作为试验材料,适宜灌水方式和施氮量作为因子进行青贮玉米种植试验。灌水方式设置畦灌和沟灌两个方式,施氮量设置4个水平。研究结果表明,沟灌与畦灌相比,鲜重产量分别增加3.6%,水分利用效率增加5.26%,氮肥偏生产力增加3.8%。施氮量对青储玉米的干物质和产量影响显著。沟灌、施氮量168 kg/hm~2的处理组合有助于提高水分利用效率,获得较高的青储玉米产量。更多还原

【Abstract】 Silage corn is the main target crop for grain to feed in Hebei province, but there are problems such as low yield, unreasonable irrigation and fertilization. In order to formulate reasonable water and fertilizer management measures, and improve the yield and water and nitrogen utilization efficiency of silage corn, appropriate irrigation method and fertilizer application amount were selected as factors for silage corn planting experiment. Border irrigation and furrow irrigation were used as irrigation methods, and four levels of nitrogen fertilization were set. The results show that: compared with border irrigation, furrow irrigation increased the fresh weight yield by 3.6%, water use efficiency by 5.26%, and nitrogen partial production efficiency by 3.8%. The amount of nitrogen fertilization had significant effects on the yield of silage corn. The treatment combination of furrow irrigation and nitrogen fertilization of 168 kg/hm~2 was helpful to improve water use efficiency and to obtain higher yield of silage corn.更多还原