Effects of one-time application of slow-release nitrogen fertilizer on wheat yield and nitrogen use efficiency in Zhoushan Area
In order to explore the effect of slow-release nitrogen fertilizer on winter wheat production,a field experiment was conducted in Daishan County,Zhejiang Province from 2020 to 2022 using Yangmai 16 as the material.The effects of slow-release nitrogen fertilizer at different release periods on wheat yield,nitrogen accumulation,apparent nitrogen use efficiency,agronomic efficiency and partial productivity were studied.The results showed that compared with conventional fertilization,the slow-release and controlled-release nitrogen fertilizer at the two release stages significantly increased the yield of wheat.From 2020 to 2021,slow-release nitrogen fertilizer significantly increased nitrogen uptake in wheat compared with conventional fertilization,but there was no significant difference in total nitrogen uptake between CF,CRU60 and CRU90 treatments in 2021-2022.Compared with CF treatment,the apparent nitrogen use efficiency,agronomic efficiency and partial productivity of wheat treated with slow-release nitrogen fertilizer increased by 3.4-6.0 percentage points,10.4%-19.8%and 3.9%-7.5%,respectively.In conclusion,the last basic application of slow-release nitrogen fertilizer with a slow-release period of 90 days in wheat production can achieve the effects of increasing efficiency,saving labor and saving costs.
wheatyieldnitrogen accumulationnitrogen use efficiency
万方数据
维普
