在甘南开展白菜型冬油菜适宜种植密度试验，为高寒区示范推广冬油菜提供技术支持。设45万、60万、75万、90万、105万株/hm2共5个种植密度，研究种植密度对高寒区冬油菜越冬率、生育期、产量及经济性状的影响。结果表明，5个密度处理的冬油菜均能正常越冬，越冬率随种植密度的增加而降低。密度60万株/hm2的处理表现出良好的群体效应，越冬率为89.7%，性状优良，折合产量最高，为1 971 kg/hm2。

Experiment on suitable planting densities of winter Brassica rapa in Gannan was conducted to provide technical support for the demonstration and promotion of winter Brassica rapain alpine region. 5 planting densities, i.e. 450 000, 600 000, 750 000, 900 000 and 1 050 000 plants/ha, were used to study the effects of planting densities on overwintering rate, growth period, yield, and economic traits of alpine winter Brassica rapa. Results showed that overwintering in 5 densities was normal, but the overwintering rate decreased along with the increase of planting density. 600 000 plants/ha treatment showed ideal population effect which had an overwintering rate of 89.7% and an average yield of 1 971 kg/ha with premium quality.

S567.239

甘肃省科技计划民生科技专项-乡村振兴专题(21CX6NP218)。