关键词: 液体牛粪, 辣椒, 氮肥, 品质, 产量

Abstract:

To explore the effect of nitrogen reduction combined with liquid cow dung on the quality and efficiency of pepper, and screen out the best combination ratio to provide a reference for the efficient use of cow dung resources and the reduction of fertilizer application.The amount of phosphorus and potassium fertilizer application remained unchanged. Seven treatments (CK,no nitrogen fertilizer; T1,liquid cow dung; T2,100% nitrogen; T3,15% nitrogen reduction with liquid cow dung; T4,30% nitrogen reduction with liquid cow dung; T5,45% nitrogen reduction with liquid cow dung; T6,60% nitrogen reduction with liquid cow dung) were set up to study the effects of nitrogen reduction with liquid cow dung on pepper yield and quality.Compared with CK, the plant height, stem diameter, leaf length and leaf width of pepper increased by 5.1%-20.0%, 0.8%-19.3%, 10.2%-35.3% and 10.4%-23.7% respectively; The fresh and dry weight per plant increased by 7.1%-85.1% and 10.3%-104.3% respectively; The yield increased by 11.8%-47.8%; The contents of vitamin C, amino acid and reducing sugar increased by 4.0%-20.0%, 4.9%-79.7% and 15.6%-109.3% respectively; The nitrite content decreased by 60.5%-138.2%. Through comprehensive comparison of various detection indicators, T4 treatment has the best effect and the greatest value. The combination of liquid cow dung and appropriate reduction of nitrogen fertilizer can promote the growth of pepper plants and improve the yield and quality of pepper. Under the standard of liquid cow dung (67.5 t·hm^-2), the best reduction of nitrogen fertilizer is 30%.

Key words: liquid cow dung, pepper, nitrogenous fertilizer, quality, yield