施氮对强筋小麦生长发育和产量的影响

摘要

An experiment was carried out to study the effect of nitrogen application on the growth and yield of strong gluten wheat variety ‘Yannong 19’during 2015 in Jiangsu,Yuntai farm.Five treatments were arranged in the test:fine with ni-trogen,nitrogen,school,routine,no fertilizer treatment (CK).The results showed that the number of wheat seedlings of re-fined nitrogen treatment was the highest,and the seedlings number at mature stage increased the most,which was 19.37%higher than that of the conventional treatment.Compared with the conventional treatment,the effective panicle number, grain number per spike,grain weight and grain yield of the refined nitrogen treatment were increased.Therefore,the suit-able nitrogen level was 701.4 kg/hm2 (46% urea),and the ratio of base fertilizer,tillering fertilizer and jointing booting stage fertilizer =1∶1∶2 treatment showed the best effect.%2015年选用‘烟农19’在江苏云台农场开展了施氮对强筋小麦生长发育和产量的影响研究，试验设5个处理：精氮、配校、无氮、常规、无肥（CK）处理。结果表明：以精氮处理的小麦苗数最多，在成熟期苗数提高幅度最大，比常规处理提高了19.37％。精氮处理与常规处理相比，小麦有效穗数、穗粒数、千粒重和产量均有所提高。因此，施氮水平以701.4 kg／hm2（46％尿素），基肥∶分蘖肥∶拔节孕穗肥＝1∶1∶2的效果最好。