摘要
研究和推广新型氮肥产品,可提高作物的产量和肥料利用效率,实现农业的可持续发展.本文研究了追施三种不同氮肥对冀西北地区春玉米生长特性和氮肥利用效率的影响,结果表明三种氮肥处理春玉米同一生育期的株高和地上部生物量差异不显著;追施氮肥可以显著提高春玉米的产量和氮肥利用效率,其中追施硝酸铵钙春玉米的产量、氮肥偏生产力、氮肥农学效率和氮肥利用率分别为9.48 t/hm2、68.7 kg/kg、17.3 kg/kg和40.3%,均高于追施尿素和碳酸氢铵处理的产量和氮肥利用效率;硝酸铵钙保证了春玉米产量并提高了氮肥利用效率,可以作为新型氮肥产品在冀西北地区推广.
New nitrogen fertilizer products can not only increase yield of spring maize,but also improve nitrogen use efficiencies for sustainable agricultural development.Effects of different nitrogen fertilizer topdressing on growth characteristics and nitrogen use efficiencies of spring maize in the Northwest of Hebei Province were studied.The results showed that differences of plant height and aboveground biomass were not significant under different nitrogen treatment;different nitrogen topdressing could significantly improve yield of spring maize,partial factor productivity from applied N（PFPN）,agronomic efficiency of applied N（AEN） and recovery efficiency of applied N（REN）,which were 9.48 t/hm^2,68.7 kg/kg,17.3 kg/kg and 40.3% under CAN treatment,respectively.CAN ensures the yield of spring maize and nitrogen use efficiencies,and can be used in the Northwest of Hebei Province as the new fertilizer products.
出处
《河北北方学院学报（自然科学版）》
2009年第6期24-28,共5页
Journal of Hebei North University:Natural Science Edition
基金
国家科技支撑计划项目(2007BAD87B02-02)
张家口市科技攻关计划项目(0811038C-3)
关键词
春玉米
产量
氮肥利用效率
spring maize
yield
nitrogen use efficiencies
