Effect Of Nitrogen Fertilizers On Soil Nutrients And Peanut Yield And Quality

This experiment was conducted in the experimental field of Paozi Town,Fuxin City,Liaoning Province from May 2019 to September 2019.Nonghua 9 was used as the test material to study different types of nitrogen fertilizers（CK:no nitrogen fertilizer,N1:urea,N2:Sodium nitrate,N3:calcium nitrate,N4:ammonium sulfate,N5:amino acid,N6:calcium sulfate and sodium nitrate,N7:sheep manure）on the growth and development of peanuts,soil nutrients,soil urease,yield and quality,to determine the effect The types of peanut yield and quality nitrogen fertilizer in Liaoning Province provide a theoretical basis for peanut planting and fertilization practice in Liaoning Province.the result shows:1.The application of nitrogen fertilizer can promote the increase of soil nutrient content.Compared with CK（no nitrogen fertilizer）,both organic nitrogen fertilizer and inorganic nitrogen fertilizer can increase the soil nutrient content.N1（urea）treatment has higher ammonium nitrogen and nitrate nitrogen content in each growth period of peanuts,and N7（sheep manure）can increase the content of available phosphorus and potassium in the soil,and the fertilizer effect is more sustained.The soil urease activity of N1（urea）was significantly improved in the seedling stage compared with other treatments,and the urease activity of N1（urea）was the largest during the whole growth period of peanuts.2.Fertilization can promote the growth and development of peanuts.Both the plant height and the number of branches of peanuts are optimized with N1（urea）.The content of total nitrogen,total phosphorus,and total potassium in peanut plants is higher than that in stems.3.Different nitrogen fertilizer treatments significantly increased the yield of peanuts,and the highest yield of N1（urea）was 4249.65 kg·hm^-2.Compared with other treatments,the peanut yield of CK treatment increased by 43.87%,7.14%,7.66%,42.56%,2.68%,37.11%,5.07%,respectively.The protein content of peanut is best with N1（urea）,and the difference in fat,oleic acid,linoleic acid and O/L of different nitrogen fertilizers is not significant.The fat is best with N4（ammonium sulfate）,and O/L is with N1（urea）.Optimal.4.The application of nitrogen fertilizer can increase the output value and profit of peanuts.The output value and profit of N1（urea）are the highest among all treatments,followed by N4（ammonium sulfate）and N6（calcium nitrate and ammonium sulfate）.