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

doi:10.11924/j.issn.1000-6850.casb2022-0522

Abstract

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

LI Haifeng, LIU Guohong, GUO Hongmei, WU Jiuyun, MAI MAI TI· Huxidan, A MU TI· Rexidan, LIU Zhigang. Effects of Chemical Fertilizer Reduction on Growth, Yield and Quality of Greenhouse Pepper[J]. Chinese Agricultural Science Bulletin, 2023, 39(19): 33-38.

Figures/Tables 12

References 23

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处理	N/(kg/hm²)	P₂O₅/(kg/hm²)	K₂O/(kg/hm²)	有机肥/(kg/hm²)	养分减少率/%
CK	450	300	750	3000
T1	405	150	675	3000	18
T2	360	120	600	3000	28
T3	315	90	525	3000	38
T4	270	60	450	3000	48

处理	N/(kg/hm²)	P₂O₅/(kg/hm²)	K₂O/(kg/hm²)	有机肥/(kg/hm²)	养分减少率/%
CK	450	300	750	3000
T1	405	150	675	3000	18
T2	360	120	600	3000	28
T3	315	90	525	3000	38
T4	270	60	450	3000	48

处理	单果重/g	单株产量/g	产量/(kg/hm²)	增产率/%
CK	54.17±11.43a	451.44±55.95b	25081.21b
T1	55.21±11.56a	552.13±45.08a	30675.14a	22.30
T2	49.45±10.03ab	385.75±22.12b	21431.35b	-14.55
T3	43.67±4.12b	393.04±35.66b	21836.79b	-12.94
T4	46.62±5.81b	447.51±90.87b	24862.79b	-0.90

处理	单果重/g	单株产量/g	产量/(kg/hm²)	增产率/%
CK	54.17±11.43a	451.44±55.95b	25081.21b
T1	55.21±11.56a	552.13±45.08a	30675.14a	22.30
T2	49.45±10.03ab	385.75±22.12b	21431.35b	-14.55
T3	43.67±4.12b	393.04±35.66b	21836.79b	-12.94
T4	46.62±5.81b	447.51±90.87b	24862.79b	-0.90

处理	果长/cm	果茎/cm	果肉厚/mm	果形指数
CK	22.94±1.47ab	2.89±0.22a	2.02±0.33a	7.94±0.90b
T1	22.90±1.50ab	2.88±0.36ab	2.12±0.41a	7.94±0.95b
T2	23.85±1.18a	2.58±0.28c	1.76±0.23ab	9.24±0.86a
T3	22.34±1.34b	2.63±0.23c	1.76±0.26b	8.50±0.92ab
T4	22.17±1.16b	2.65±0.29bc	1.86±0.31b	8.37±1.2ab