Effect of foliar spraying of zinc fertilizer and citric acid on yield, quality and Cd absorption and transport ation of pepper

doi:10.3969/j.issn.1004-1524.2023.05.10

Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (5): 1069-1079.DOI: 10.3969/j.issn.1004-1524.2023.05.10

• Horticultural Science • Previous Articles Next Articles

Effect of foliar spraying of zinc fertilizer and citric acid on yield, quality and Cd absorption and transport ation of pepper

CHAI Guanqun¹(), ZHOU Wei¹, LIANG Hong², FAN Feifei¹, ZHU Dayan¹, FAN Chengwu¹^,^*()

1. Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China
2. College of Agriculture, Guizhou University, Guiyang 550025, China

Received:2022-05-31 Online:2023-05-25 Published:2023-06-01

Abstract

Abstract:

In order to clarify the effects of ZnSO₄ and citric acid on the pepper and to provide a theoretical basis for the safe production of Cd in pepper, a pot experiment was conducted to investigate effects of foliar spraying of 200 μmol·L^-1 ZnSO₄, 40 μmol·L^-1 citric acid and the combination on the absorption and transportation of Cd in pepper, yield and quality of pepper fruit. The results showed that compared with foliar spraying of pure water, synergistic spraying of 200 μmol·L^-1 ZnSO₄ and 40 μmol·L^-1 citric acid (Zn₂₀₀+CA₄₀) significantly reduced fruit yield, soluble sugar and amino acid contents, and increased soluble protein content, but had no significant difference in capsaicin. Pod pepper Qing Hong Yuan Shuai had a strong ability to absorb Cd from soil, Cd content in different tissues were as follows: leaf on main stem>root>fruit>leaf on fork stem>fork stem≈main stem. Content of Cd in pod pepper fruit ranged from 0.58 to 0.79 mg·kg^-1. Compared with foliar spraying of pure water, the Cd content of pepper fruit treated with Zn₂₀₀+CA₄₀ was significantly reduced by 26.58%, and this treatment significantly reduced the net Cd uptake by root and its transfer efficiency of Cd from the leaf on the main stem and the leaf on the fork stem to the fruit, and significantly increased the transfer efficiency of Cd from root to main stem, fork stem, and leaf on the main stem and leaf on the fork stem, and it also significantly increased the distribution ratio of Cd in the aboveground vegetative organs of pepper, especially the distribution ratio of Cd in the leaf on the main stem. In summary, the decrease of Cd content in fruit treated with Zn₂₀₀+CA₄₀ was mainly due to the decrease of net Cd uptake by pepper root and the efficiency of Cd transport from leaf on main stem to fruit.

Key words: pepper, Cd, absorption and transportation, accumulation and distribution, yield, quality

CLC Number:

CHAI Guanqun, ZHOU Wei, LIANG Hong, FAN Feifei, ZHU Dayan, FAN Chengwu. Effect of foliar spraying of zinc fertilizer and citric acid on yield, quality and Cd absorption and transport ation of pepper[J]. Acta Agriculturae Zhejiangensis, 2023, 35(5): 1069-1079.

Figures/Tables 8

References 29

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处理 Treatment	果实干重 Dry weight of fruits/g	果实数量 Number of fruits	单果干重 Dry weight per fruit/g	整株干重 Dry weight of whole plant/g	果实干重占比 Percentage of dry weight of fruit/%
CK	33.01±0.18 a	54.67±0.47 ab	0.60±0.01 a	75.50±0.41 a	43.73±0.48 a
Zn₂₀₀	33.12±2.07 a	50.00±2.45 b	0.66±0.01 a	76.11±2.22 a	43.48±1.58 a
CA₄₀	31.52±1.5 ab	60.00±3.27 a	0.51±0.05 b	77.91±2.62 a	39.15±0.61 b
Zn₂₀₀+CA₄₀	29.31±0.99 b	49.67±4.50 b	0.59±0.05 ab	74.17±0.06 a	39.52±1.30 b

处理 Treatment	果实干重 Dry weight of fruits/g	果实数量 Number of fruits	单果干重 Dry weight per fruit/g	整株干重 Dry weight of whole plant/g	果实干重占比 Percentage of dry weight of fruit/%
CK	33.01±0.18 a	54.67±0.47 ab	0.60±0.01 a	75.50±0.41 a	43.73±0.48 a
Zn₂₀₀	33.12±2.07 a	50.00±2.45 b	0.66±0.01 a	76.11±2.22 a	43.48±1.58 a
CA₄₀	31.52±1.5 ab	60.00±3.27 a	0.51±0.05 b	77.91±2.62 a	39.15±0.61 b
Zn₂₀₀+CA₄₀	29.31±0.99 b	49.67±4.50 b	0.59±0.05 ab	74.17±0.06 a	39.52±1.30 b

处理 Treatment	可溶性糖含量 Soluble sugars content/ (g·kg^-1)	可溶性蛋白含量 Soluble proteins content/ (g·kg^-1)	氨基酸含量 Amino acids content/ (mg·kg^-1)	辣椒碱含量 Capsaicin content/ (g·kg^-1)	V_C含量 V_C content/ (mg·kg^-1)
CK	80.36±1.81 a	23.12±0.26 c	1 572.21±100.41 a	1.91±0.14 a	422.49±18.32 b
Zn₂₀₀	68.23±1.34 b	21.49±0.67 d	1 645.83±13.50 a	1.62±0.21 a	607.69±29.02 a
CA₄₀	81.23±3.47 a	29.92±0.42 b	1 396.94±70.43 b	1.60±0.26 a	403.17±16.99 b
Zn₂₀₀+CA₄₀	44.85±0.96 c	31.66±1.06 a	1 264.23±45.26 b	2.15±0.51 a	414.85±23.99 b

处理 Treatment	可溶性糖含量 Soluble sugars content/ (g·kg^-1)	可溶性蛋白含量 Soluble proteins content/ (g·kg^-1)	氨基酸含量 Amino acids content/ (mg·kg^-1)	辣椒碱含量 Capsaicin content/ (g·kg^-1)	V_C含量 V_C content/ (mg·kg^-1)
CK	80.36±1.81 a	23.12±0.26 c	1 572.21±100.41 a	1.91±0.14 a	422.49±18.32 b
Zn₂₀₀	68.23±1.34 b	21.49±0.67 d	1 645.83±13.50 a	1.62±0.21 a	607.69±29.02 a
CA₄₀	81.23±3.47 a	29.92±0.42 b	1 396.94±70.43 b	1.60±0.26 a	403.17±16.99 b
Zn₂₀₀+CA₄₀	44.85±0.96 c	31.66±1.06 a	1 264.23±45.26 b	2.15±0.51 a	414.85±23.99 b

处理 Treament	果实 Fruit	叉茎 Fork stem	主茎 Main stem	叉茎上叶 Leaf on fork stem	主茎上叶 Leaf on main stem	根 Root	地上部 Above-ground parts	地上部营养器官 Above-ground vegetative organs	整株 Whole plant
CK	0.79±0.04 a	0.35±0.01 a	0.31±0.04 a	0.56±0.02b	2.14±0.10 a	1.98±0.06 a	0.62±0.02 a	0.52±0.01 a	0.75±0.03 a
Zn₂₀₀	0.64±0.03 b	0.36±0.03 a	0.28±0.02 a	0.61±0.02 a	1.61±0.21 b	1.61±0.10 b	0.55±0.02 b	0.48±0.02 b	0.64±0.03b
CA₄₀	0.73±0.01 a	0.39±0.03 a	0.32±0.03 a	0.60±0.01 a	2.29±0.09 a	1.43±0.10 b	0.63±0.01 a	0.52±0.02 a	0.70±0.01 a
Zn₂₀₀+CA₄₀	0.58±0.06 b	0.28±0.02 b	0.31±0.01 a	0.53±0.01 b	2.37±0.02 a	1.14±0.11 c	0.55±0.02 b	0.52±0.03 a	0.61±0.03 b

Effect of foliar spraying of zinc fertilizer and citric acid on yield, quality and Cd absorption and transport ation of pepper

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变异来源 Source of variation	平方和 Sum of square	自由度 Degree of freedom	均方 Mean square	F值 F value
修正模型Modified model	10.421^#	3	3.474	16.472^**
截距Intercept	687.629	1	687.629	3 260.564^**
Zn	3.291	1	3.291	15.604^**
CA	3.867	1	3.867	18.336^**
Zn×CA	3.264	1	3.264	15.475^**
误差Error	1.687	8	0.211
总计Sum	699.737	12
校正的总计Modified sum	12.108	11

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