摘要
研究大田条件下施氮量和施氮方式对‘临草2号’干物质积累及鲜干草产量的影响。结果表明,施氮使‘临草2号’干物质积累量和鲜干草产量明显增加,且随施氮量增加干物质积累量和鲜干草产量呈增加趋势,施氮量在300kg/hm2时,鲜干草产量最高,氮肥利用效率最高,再增施氮肥干物质积累量和鲜干草产量变化不明显;施氮量相同时,氮肥采用70%基施+30%追施比一次基施更有利于‘临草2号’干物质积累,提高鲜干草产量。因此,在施纯氮300kg/hm2基础上,氮肥采取70%基施+30%追施,可实现‘临草2号’高产高效栽培。
Effect of N application on dry matter accumulation,fresh and dry yields of ' Lincao 2 ' were studied under field experiment.The results showed that,dry matter accumulation,fresh and dry yields of ' Lincao 2 ' were increased with N application rate.' Lincao 2 ' had the highest fresh and dry yields,and N fertilizer had the most use efficiency when N application rate was 300 kg/hm 2.Dry matter accumulation,fresh and dry yields changed little at more N application rate.70% N as basal and 30% N drop dressing at jointing stage was favorable for dry matter accumulation,fresh and dry yields increasing of ' Lincao 2 ' than all N as basal,when at the same application N rate.High yields and high efficiency cultivation of ' Lincao 2 ' could be realized under N application at 300 kg/hm 2(70% basal and 30% top dressing at jointing stage).
出处
《中国农学通报》
CSCD
北大核心
2011年第9期91-95,共5页
Chinese Agricultural Science Bulletin
基金
山西省科技攻关项目(041008)
山西省农科院攻关项目(YGG0718)
关键词
施氮量
施肥方式
干物质积累
鲜干草产量
nitrogen
nitrogen application methods
dry matter accumulation
fresh and dry yields