施氮时期和施氮量对优质专用春小麦产量和品质的影响

Effects of the period and amount of nitrogen application on yield and quality in special and high quality of spring wheat[HJ*2/3]

对优质专用春小麦V20进行了不同施氮时期和施氮量的施肥试验,结果表明:春小麦追施氮肥以375kg/hm2尿素为最佳,春小麦产量为5 317.95 kg/hm2,追施尿素525、225和75 kg/hm2的处理春小麦产量依次降低。施氮时期以扬花期施氮春小麦产量最高,为5 086.65 kg/hm2,其次为拔节期施氮,产量为5 043.75 kg/hm2;孕穗期施氮春小麦产量最低为4 978.65 kg/hm2。施氮时期和施氮量对春小麦品质的影响为:在一定施氮量内,春小麦品质与施氮量成正相关,施氮量越多,品质越好;在扬花期施用氮肥,有利于提高春小麦的品质。

An experiment of applying fertilizer is carried out on effect of the different period and amount of nitrogen application on the high - quality special - purpose spring wheat V20. The result indicated that it is the best that the amount of nitrogen application in spring wheat is regarded as 375 kg/hm^2 urea, the yield of the spring wheat is 5 317. 95 kg/hm^2, the yield of spring wheat reduces sequentially with treatment under the amount of nitrogen application as 525 kg/hm^2 , 225 kg/hm^2, 75 kg/hm^2. The yield of spring wheat for top application nitrogen in predncing flower time is 5 086.65 kg/hm^2. Secondly, in jointing stage, the yeild is 5 043.75 kg/hm^2. The treatment of lowest yield is application nitrogen in booting stage, it is 4 978.65 kg/hm^2. The effects of the period and amount of nitrogen application on quality in spring wheat are as follows： within applying certain amount of nitrogen, the quality of the spring wheat and amount of nitrogen application become positive correlation, the more amount of nitrogen application is given, the better quality is. Applying nitrogen in flowering period is favorable to raise the quality of the spring wheat.