关键词: 萝卜, 萝卜

Abstract:

In order to provide the increasing production for winter wheat, we study the nitrogen strategies and nitrogen needs of wheat growth to be consistent with the best match. Select ‘Zhoumai18’ as material, the effects of nitrogen strategies were studied by the population changes, grain number and yield of wheat. The results showed that the nitrogen strategies technique of increasing topdressing and later supplementing by controlling basal can reduce the peak changes in the growth population, effectively improve spike rate and promote full grain and big spike. In the 240 kg/hm2 and 180 kg/hm2 of nitrogen conditions, the yield of the nitrogen application technique of increasing topdressing and later supplementing by controlling basal increased by 694.5 kg/hm2 and 486.0 kg/hm2 compared with conventional nitrogen model. From the sustainable use of resources and nitrogen fertilizer production efficiency, the nitrogen application technique of increasing topdressing and later supplementing by controlling basal will be nitrogen strategies technique with high yield and efficiency.