不同施氮水平对双低油菜苏油4号产量与品质的影响  

Effect of Different Nitrogen Levels on Seed Yield and Quality of Double-low Rape Suyou No.4

作　　者：孙华[1] 张建栋[1] 陈培峰[1] 黄萌[1] 许才康[1] 乔中英[1] 蒋鹤云[1] 

机构地区：[1]江苏太湖地区农业科学研究所,江苏苏州215155

出　　处：《江西农业学报》2010年第1期27-29,共3页Acta Agriculturae Jiangxi

基　　金：国家行业专项(nycytx-00559);江苏省科技支撑计划(BE2008369);江苏省农业科技自主创新项目[cx(08)605];苏州市农业科技攻关计划(SNG0816)

摘　　要：通过田间试验,研究了不同施氮水平对苏油4号产量与主要品质的影响。结果表明:(1)随着施氮水平的增加,产量先增后降,比不施氮肥增产均达极显著水平;(2)提高施氮水平能显著增加单株有效角果数,但过量施氮则降低单株有效角果数,施氮水平对每角粒数和千粒重影响不大,要取得高产,应主攻单株有效角果数;(3)随着施氮水平的增加,主轴和一次分枝有效角果数有所增加,二次分枝显著增加,同时显著增加了单株一次与二次有效分枝数,但过量施氮使单株一次有效分枝数显著减少;(4)籽粒含油率和蛋白质含量随着施氮水平的增加而降低。在该试验条件下,为获得较高产量和保证双低品质,苏油4号氮肥适宜用量为纯N 262.5 kg/hm2。Field tests were conducted to investigate the effects of different nitrogen application levels on the seed yield and quality of Suyou No. 4. The results showed that along with the increase of nitrogen levels, the grain yield increased first and then decreased. The seed yield at all nitrogen levels was significantly higher than that without N＇application. Increasing the nitrogen levels could significantly increase the effective pods per plant, but excess nitrogen application could decrease the effective pods per plant. The nitrogen levels had little influence on the seeds per pod and 1000 - seed weight. The key to the high - yielding cultivation of Suyou No. 4 was enhancing the effective pods per plant. Along with the increase of nitrogen levels, the number of silique on main inflorescence and on the first branches was increased, that on the second branches was significantly increased, at the same time the primary branches and the secondary branches were significantly increased too. But excess nitrogen application could significantly decrease the primary branches. The oil and protein contents in rapeseed decreased along with the increase of nitrogen levels. Under this experimental condition, to obtain higher seed yield and ensure double - low quality, the optimum level of nitrogen application for Suyou No. 4 was 262.5 kg/ hm^2 .

关 键 词：油菜 施氮水平 苏油4号 产量 品质 

分 类 号：S565.4[农业科学—作物学]