【摘要】 以高产中筋冬小麦品种济麦22为材料,应用普通尿素和腐植酸尿素,采用单独或混合按一定比例分层施用方式,探讨其对小麦生长发育和产量的影响效果。结果表明,与常规施肥处理(OPT)相比,氮肥分层施用处理OPT1、OPT2的小麦产量分别增加5.3%和4.4%,产量差异主要来自有效穗数和穗粒数;同时,小麦各生育时期干物质积累量和氮素含量也有所增加,氮素利用率分别提高6.4和4.2个百分点。更多还原

【Abstract】 The high- yielding and mid- gluten winter wheat cultivar Jimai 22 was used as material to study the effects of nitrogen fertilization on its growth,development and yield. Two kinds of nitrogen fertilizer( general urea and humic acid urea) and two fertilization methods( single and layered application at a certain ratio) were designed in the experiment. The results showed that compared with the traditional fertilization treatment( OPT),the layered fertilization treatments( OPT1 and OPT2) increased the grain yield by 5. 3%and 4. 4%. The difference of increased grain yield was mainly caused by the difference of effective spike number and kernel number per spike. The OPT1 and OPT2 also increased the dry matter accumulation and nitrogen content at every stage,and the nitrogen use efficiency were increased by 6. 4 and 4. 2 percentage points respectively.更多还原