宰相庄晚播冬小麦春季施氮肥的研究简报

本文采用双因素裂区设计,对宰相应砂薄地晚播冬小麦春季施氮量(A因素)和施氮分配方法(B因素)进行研究,结果表明:(1)春季施尿素为300kg/ha的处理(A_1),其籽粒产量、亩穗数、穗粒数、千粒重、次生根数、单株分蘖数、灌浆速度等均高于180kg/ha尿素的处理(A_2)。(2)春季两次施(B_2:返青1/3+拔节2/3)的籽粒产量、穗数、穗粒数均高于三次施(B_3、B_4)和一次施(B_1)。三次施的B_3(返青1/4+拔节1/2+挑旗1/4)的产量显著高于B_4(返青 1/4+拔节 1/2+扬花前 1/4);B_3的亩穗数、穗粒数高于B_4,但无明显差异;B_3的千粒重显著低于B_4。三次施的产量、穗数、穗粒数、千粒重、均高于B_1(拔节一次施)。千粒重随着施氮时期的推迟呈递增趋势;B_4>B_3>B_2>B_1。

PRELIMINARY RESEARCH ON THE APPLICATION OF NITROGEN FERTILIZER IN SPRING TO THE LATE SOWN WHEAT IN ZHAI XIANGZHUANG

The results that is proved by the authors by means of two kindsof amount of N fertilizer applied with four kinds of applied method are asfollows: The treatment applied by 300kg N fertilizer (A1) is higher than one of180kg N fertilizer (A2)on ear number per hectare, grain number per spike,thousand grain weight(TGW), total spikelet number, spike length, secondaryroot number, tiller per plant, dry weight per plant, filling speed etc. The results which is showed by the applied method are as follows: The treatment of two times of applied N fertilizer at the reviving andelongation stage is higher than three times and one time on the grain yield,ear number, grain number per spike, tiller number per plant, dry weightper plant and filling speed. There isn't obviously different between twokinds of treatment in three times but they are obviously higher than onetime.