Study On The Effect Of Different Type Of Slow Controlled Release Fertilizer On Increasing Yield And Efficiency Of Maize

At present,the unreasonable application of nitrogen fertilizer in China leads to waste of resources and environmental pollution.Slow-controlled release fertilizers can avoid a series of ecological environmental problems caused by excessive fertilizer because of their long fertilizer efficiency and high fertilizer utilization.However,there are a variety of slow-controlled release fertilizers in the market,and the effects are different.To this end,I take the spring corn as the test object in the south and middle area of Liaoning,by studying and comparing whether the slow-controlled release fertilizer can achieve the effect of reducing nitrogen and fertilization in spring maize in the case of one-time nitrogen and nitrogen reduction,and screening the slow controlled release fertilizer suitable for spring maize application in south and middle area of Liaoning.Four kinds of slow controlled release fertilizers are selected in this experiment: stable fertilizer,urea-formaldehyde BB fertilizer,carbon-based corn slow-release fertilizer and sulfur-coated urea were compared with corn test,and the growth status,yield and nitrogen utilization of maize in the case of one-time nitrogen application with urea and one-time nitrogen reduction 10%.It was found that the yield of 11139KG/HM2 fertilizer(treatment 4)was higher than that of disposable nitrogen(treatment 3)and 11.9%,higher than the best fertilization treatment(treatment 2)2.3%,nitrogen utilization rate,agronomy efficiency and nitrogen fertilizer partial productivity were 30.59%,12.1%,3.54kg/kg,the treatment of urea with single nitrogen and optimal fertilization was improved.The yield of 10716kg/hm2 with urea-formaldehyde BB Fertilizer(treatment 5)was 7.6% higher than that of disposable nitrogen,1.6% was lower than optimal fertilization,and nitrogen utilization rate,agronomy efficiency and nitrogen fertilizer productivity were 29.33%,10.1% and 3.40kg/kg respectively.The yield of carbon-based maize slow-release fertilizer(treatment 6)10849KG/HM2 was 9%higher than that of disposable nitrogen,0.3% was lower than the best fertilization,and nitrogen utilization rate,agronomy efficiency and nitrogen fertilizer productivity were26.74%,10.7% and 3.44 kg/kg respectively.The yield of 10501kg/hm2 with sulfur coated urea(treatment 7)was 5.5% higher than that of disposable nitrogen,3.5% was lower than theoptimal fertilization,and nitrogen utilization rate,agronomy efficiency and nitrogen fertilizer productivity were 15.45%,9.1% and 3.33 kg/kg respectively.Can be concluded: stable fertilizer,urea-formaldehyde BB fertilizer,carbon-based slow-release fertilizer and sulfur-coated urea can all make spring corn achieve increasing yield under the condition of one-time nitrogen application,but only stable fertilizer can make spring corn achieve increasing yield and efficiency.