河南农业科学2013，Vol.42Issue(5)：45-48,4.
追肥时期对特早熟夏玉米氮磷钾吸收及干物质积累的影响
Effects of Topdressing Time on N,P and K Uptake and Dry Matter Accumulation of Especial-early Summer Corn
摘要
Abstract
The especial-early summer corn cultivar Jichengdan 3 was used to study the effects of topdressing time on nutrient uptake and dry matter accumulation of especial-early summer corn.The experiment was conducted in Jinzhong Basin,with two topdressing times,at jointing stage or at big flare stage.The results showed that the accumulation amount of N,P2O5 and K2O was 190.62 kg/ha,133.14 kg/ha and 320.45 kg/ha respectively when topdressed at big flare stage,markedly higher than at jointing stage.The absorption intensities of N,P2O5 and K2O all presented two peaks during the whole growth period,though they were all higher when topdressed at big flare stage [(2.14 kg/(ha · d),1.53 kg/(ha · d) and 3.44 kg/(ha · d),separately)].The biological yield and economic yield were markedly higher when topdressed at big flare stage,reaching to 13730.38 kg/ha and 5726.03 kg/ha respectively,which were 2.07％ and 5.98％ higher than those when topdressed at jointing stage.The economic coefficient was also improved.关键词
特早熟夏玉米/追肥时期/氮磷钾吸收规律/干物质积累Key words
especial-early summer corn/ topdressing time/ N, P and K uptake law/ dry matter accumulation分类
农业科技引用本文复制引用
刘秀红,杜天庆,郝建平,申毅力..追肥时期对特早熟夏玉米氮磷钾吸收及干物质积累的影响[J].河南农业科学,2013,42(5):45-48,4.基金项目
山西省科技攻关项目(20100311002-9) （20100311002-9）
长治市星火计划项目(20104003) （20104003）
