Effects of nitrogen fertilizer management at different sowing dates on the economic characteristics and yield of the wheat cultivar Zhehua 1
In Zhejiang Province,rice-stubble wheat is mainly grown,and late sowing of rice straw is the norm.This experiment was conducted to study the effects of nitrogen fertilizer ratio at different stages of wheat growth on the economic characteristics and yield of Zhehua 1 wheat variety under the condition of total straw return and constant total nitrogen.The experimental results showed that the yield of wheat with nitrogen fertilizer was significantly increased compared with that without nitrogen fertilizer,and the yield of suitable sowing on November 1,2022 was higher than that of late sowing on November 25,2022.When the application of the same total nitrogen was 412.5 kg·hm-2,nitrogen fertilizer operation ratio was different,that is,base fertilizer∶seedling fertilizer∶fertilizer∶ear fertilizer was 4∶2∶4∶1 and 4∶4∶2∶1,whether it is suitable sowing season or late sowing,base fertilizer∶seedling fertilizer∶fertilizer∶fertilizer∶ear fertilizer was 4∶4∶2∶1,Zhehua 1 had the highest yield,Increasing nitrogen fertilizer at seedling stage is mainly to promote tillering,increase effective spike and increase yield.
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