Screening of High Zinc Efficiency Genotypes of Summer Maize in the Huang-Huai-Hai Region

doi:10.11924/j.issn.1000-6850.casb2022-0437

Abstract

Abstract:

Zinc (Zn) insufficient is one of the limiting factors for the normal growth and development of summer maize in the calcarious soil in the Huang-Huai-Hai region. Zn fertilization is very important for high and stable yield in maize production. To screen high Zn efficiency genotypes in this region, a field experiment was conducted using 10 main cultivated maize genotypes. Four foliar spraying Zn stages were set to analyze the variation of bare tip length, grain yield and Zn content, and screen the high Zn efficiency genotypes according to the Zn responsivity. The results indicated that foliar spraying of 4.5 kg ZnSO₄·7H₂O/hm² could decrease the bare tip length significantly. The grain yield and Zn content under the foliar spraying Zn at the jointing and flaring stage by 1:1 could be increased by 7.5% and 34.3%, reaching 8.73 t/hm² and 43.94 mg/kg, respectively. Compared with no Zn addition, under the foliar spraying Zn at the jointing and flaring stage by 1:1, the reduced margin of bare tip length of ‘DK653’ and ‘LP638’, the yield growth margin of ‘GSY66’ and ‘ZD958’ and the grain Zn content of ‘ZD958’ were the maximum, respectively. The result of cluster analysis of Zn responsivity showed that ‘GSY66’ and ‘ZD958’ were high Zn efficiency genotypes, and they could be planted in the Zn insufficient soil of Huang-Huai-Hai region, and the treatment of foliar spraying of 4.5 kg ZnSO₄·7H₂O/hm² at the jointing and flaring stage by 1:1 could increase grain yield and Zn content in this region.

Key words: summer maize, yield, high zinc efficiency, genotypes, screening

ZHANG Panpan, HE Guanhua, LI Chuan, ZHANG Meiwei, NIU Jun, QIAO Jiangfang, HE Jiawen. Screening of High Zinc Efficiency Genotypes of Summer Maize in the Huang-Huai-Hai Region[J]. Chinese Agricultural Science Bulletin, 2023, 39(14): 6-11.

Figures/Tables 6

References 25

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处理	籽粒锌含量
处理	Zn0	Zn1	Zn2	Zn3	平均
DH605	27.96de	36.48bc	40.30b	43.75bc	37.12cd
DK653	31.25cde	41.34b	60.22a	52.43ab	46.31ab
XY335	27.87de	27.48d	36.16bc	29.01d	30.13d
QL618	32.25cd	31.32cd	36.39bc	26.95d	31.73d
WK702	38.47b	40.54b	52.77a	42.25bc	43.51abc
LP638	29.21de	36.42bc	32.55bc	29.49d	31.92d
YF303	25.40e	30.50cd	39.25b	25.82d	30.24d
DD5H	33.30bcd	39.88b	54.54a	35.94cd	40.92bc
ZD958	45.41a	39.56b	30.45c	50.12ab	41.38bc
GSY66	36.08bc	49.86a	56.74a	60.28a	50.74a
平均	32.72c	37.34bc	43.94a	39.60ab	38.40

处理	籽粒锌含量
处理	Zn0	Zn1	Zn2	Zn3	平均
DH605	27.96de	36.48bc	40.30b	43.75bc	37.12cd
DK653	31.25cde	41.34b	60.22a	52.43ab	46.31ab
XY335	27.87de	27.48d	36.16bc	29.01d	30.13d
QL618	32.25cd	31.32cd	36.39bc	26.95d	31.73d
WK702	38.47b	40.54b	52.77a	42.25bc	43.51abc
LP638	29.21de	36.42bc	32.55bc	29.49d	31.92d
YF303	25.40e	30.50cd	39.25b	25.82d	30.24d
DD5H	33.30bcd	39.88b	54.54a	35.94cd	40.92bc
ZD958	45.41a	39.56b	30.45c	50.12ab	41.38bc
GSY66	36.08bc	49.86a	56.74a	60.28a	50.74a
平均	32.72c	37.34bc	43.94a	39.60ab	38.40