在半干旱地区对春小麦新品种甘春25号进行了适宜密度试验。结果表明，不同种植密度对春小麦甘春25号的生长发育与产量构成均有较明显的影响。有效成穗、穗长、小穗结实性、穗粒数、千粒重、穗粒重、产量在不同密度条件下有较大差异，在旱地条件下种植密度为375 万粒/hm2时，甘春25号折合产量最高，为 3 379.13 kg/hm2。

The suitable density is conducted to study on the new spring wheat varietie Ganchun 25 in the semi-arid. The result shows that different planting densities have more obviously impacted on the growth and yield of Ganchun 25. Different sowing densities significantly influenced the effective spike， spike length， spikelets fecundity， grain number per spike， grain weight per spike ， 1 000-grain weight， and therefore it could remarkably affected the yield. The yield of Ganchun 25 is highest reached 3 379.13 kg/hm2 when planted density is 3.75 million plants/hm2 in dry land.

S512.1

国家农业科技成果转化资金项目(2014GB2G100140)；白银市科技支撑计划项目(2013-2-36N)部分研究内容