Dry Matter Accumulation and Nitrogen Absorption Characteristics of Processed Pepper under Different Nitrogen Levels

In order to promote the rational use of nitrogen fertilizer, the dry matter accumulation, nitrogen absorption of processed pepper were studied by substrate culture and quantitative irrigation of nutrient solution under 6 different nitrogen levels (60%, 80%, 90%, 100%, 120% and 140% of the normal N application). It showed that, with the increase of nitrogen application, the dry weight of leaf, dry weight of fruit, dry weight of stem, dry weight of root, and dry weight of plant were increasing; The nitrogen content of each part run up to the maximum at 80%~100% nitrogen level; There was no significant difference between the dry weight of leaf, dry weight of root, and dry weight of fruit, as well as nitrogen content and nitrogen accumulation of these parts at 90%, 100%, 120% and 140% nitrogen level. Correlation analysis showed that nitrogen accumulation showed the highest correlation with the dry weight of leaf, dry weight of stem, dry weight of fruit, dry weight of root, and dry weight of plant, but had little correlation with nitrogen content in each part. In addition, the slight difference in nitrogen content of plant at different nitrogen levels can reflect its nutritional status, while the amount of dry matter can reflect its amount of nitrogen accumulation. This study will provide theoretical reference for rational application of nitrogen fertilizer in processed pepper.