Integrative Effects of Irrigation and Aeration on Root Morphology, Yield and Quality of Pepper

In order to unravel the relationship between the root morphology, yield and quality of pepper under different aeration amounts and irrigation amounts, with groundwater of 5 mg/L dissolved oxygen concentration in water (C) as controls, and two aeration rates of dissolved oxygen concentration at 15 mg/L ( A) and dissolved oxygen concentration at 40 mg/L (O), and two irrigation amounts of 0. 8 times of crop-pan coefficient (W1) and 1.0 times crop-pan coefficient (W2) were set up by randomized block experiments. And correlation analysis and principal component analysis were coupled and used to analyze the optimal irrigation mode. Results showed that aerated irrigation significantly promoted pepper root morphology, yield, quality, plant height and nitrogen use efficiency. The yield of treatment AW1 was the highest at 6. 78 t/hm, the yield of treatment AW1 was increased by 39. 04% and 42. 89% compared with that of OW1 and CW1 treatments, and the yield of treatment AW1 was increased by 30. 80% compared with that of AW2 treatment (P © 2022 Chinese Society of Agricultural Machinery. All rights reserved.