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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (19): 33-38.doi: 10.11924/j.issn.1000-6850.casb2022-0522

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Effects of Chemical Fertilizer Reduction on Growth, Yield and Quality of Greenhouse Pepper

LI Haifeng(), LIU Guohong, GUO Hongmei, WU Jiuyun, MAI MAI TI· Huxidan, A MU TI· Rexidan, LIU Zhigang()   

  1. Turpan Research Institute of Agricultural Sciences, Xinjiang Academy of Agricultural Sciences, Turpan, Xinjiang 838000
  • Received:2022-06-27 Revised:2022-12-15 Online:2023-07-05 Published:2023-07-03

Abstract:

To study the effects of chemical fertilizer reduction on growth, yield and quality of greenhouse pepper, five treatments including conventional fertilization (CK), chemical fertilizer reduction by 18% (T1), chemical fertilizer reduction by 28% (T2), chemical fertilizer reduction by 38% (T3) and chemical fertilizer reduction by 48% (T4) were respectively set to measure the growth, yield and quality of pepper. Principal component analysis was used to evaluate the growth characteristics, quality and yield of pepper under different fertilization treatments. The results showed that T1 and T2 treatments had better performance among different fertilization treatments. The plant height and stem diameter of T1 treatment increased by 13.83% and 22.07%, soluble protein content increased by 104.15% and yield increased by 22.30% compared with CK treatment. The root activity of T2 was the highest, which increased by 37.48% compared with CK, and the vitamin C and soluble sugar content were the highest, which increased by 20.42% and 9.69% compared with CK, respectively, but the yield was lower than CK. Through principal component analysis, the comprehensive score of each treatment group from high to low was T1>CK>T2>T4>T3. In conclusion, 18% reduction of chemical fertilizer was the optimal fertilizer application level for pepper, which had the best effect on promoting growth, increasing yield and improving quality of pepper.

Key words: pepper, fertilizer reduction, growth traits, yield, quality