Effects of Levels of Nitrogen Fertilizer Application on the Growth,Yield and Quality of Chilli Pepper

Effects of levels of nitrogen fertilizer application on growth,yield and quality of chili pepper was studied in the field in Qiubei County,Yunnan Province,China.The results showed that:(1) With the increases in nitrogen fertilizer application,plant height,branch number,stem weight,root weight and root cap agronomic traits increased.Plant height and branch number of plants increased with N 180 kg·hm-2.(2) With increases in nitrogen fertilizer application,the biomass and yield of chili pepper increased.The highest biomass 3 679.6 kg·hm-2 was observed with N 240 kg·hm-2 treatment,while the highest yield and value,3 718.8 kg·hm-2 and 20 553.4 yuan·hm-2,respectively,were observed with N:180 kg·hm-2 treatment.(3) With increases in nitrogen fertilizer application,soluble sugar content,soluble protein content and nitrate accumulation increased in pepper fruit.Nitrogen 180 kg·hm-2 was the suitable for chili pepper,which will bring optimal yield and economic income of chili pepper.