超级杂交晚稻丰源优299合理施氮量研究  

Studies on Reasonable Amount of Nitrogen Fertilizer in Super Hybrid Late Rice Fengyuanyou299

作　　者：周静 孟桂元 马国辉[2] 陈跃进 

机构地区：[1]湖南娄底人文科技学院,湖南娄底417000 [2]湖南杂交水稻研究中心,湖南长沙410125

出　　处：《云南农业大学学报（自然科学版）》2013年第4期536-539,共4页Journal of Yunnan Agricultural University:Natural Science

基　　金：湖南省教育厅项目(12C0760);湖南人文科技学院校级重点学科资助

摘　　要：以超级杂交晚稻丰源优299为材料,研究6个不同施氮量处理0,90,135,180,225,270 kg/hm2对超级杂交晚稻丰源优299产量、谷草比、氮肥利用率和经济效益的影响,从而比较出超级杂交晚稻丰源优299合理施氮量。结果表明:超级杂交晚稻丰源优299在施纯氮180 kg/hm2时,产量为7 303.5 kg/hm2,谷草比为1.34,纯收入为4 804.5元/hm2均表现最高,且显著高于其他处理(P<0.05);施纯氮量为135 kg/hm2时,产量为6 892.5 kg/hm2,仅比180 kg/hm2处理减产5.96%,减产不显著,纯收入为4 637.7元/hm2,氮肥偏生产力为52.54 kg/kg,氮肥农学利用率为22.94 kg/kg,仅次于180 kg/hm2处理。综上所述,超级杂交晚稻丰源优299合理施氮量为135～180 kg/hm2纯氮。Super hybrid late rice Fengyuanyou 299 was used to investigate the effective logic amount of nitrogen fertilizer of yields,ratios of grain to straw,nitrogen use efficiency and economic results under different six amounts of nitrogen fertilizer treatments（0,90,135,180,225,270 kg / hm^2）.The results showed that under 180 kg / hm^2 pure nitrogen,yield was 7 303.5 kg / hm^2,the ratio of grain to straw was 1.34 and economic benefit was 4 804.5 Yuan / hm^2 and they were extremely significantly higher than the other treatments.Under 135 kg / hm^2 pure nitrogen,the yield was 6 892.5 kg / hm^2,less than 180 kg / hm^2 treatment by 5.63% and economic benefit was 4 637.7 Yuan / hm^2,partial factor production of applied was 52.54 kg / kg and agronomy efficiency was 22.94 kg / kg,only second to 180 kg / hm^2 treatment.In conclusion,the reasonable amounts of nitrogen fertilizer in super hybrid late rice Fengyuanyou 299 were 135 kg / hm^2 to 180 kg / hm^2 of pure nitrogen.

关 键 词：超级杂交晚稻 施氮量 产量 经济效益 

分 类 号：S511.062[农业科学—作物学]