Effects of Soil and Foliar Zinc Application on Agronomic Traits, Grain Yield and Grain Zinc, Iron and Selenium Concentration of Wheat

doi:10.11923/j.issn.2095-4050.casb2020-0206

Abstract

Abstract:

Zinc (Zn) is an essential micronutrient element for the growth and development of animals, plants and the human body, which can prevent pneumonia and other diseases and improve human immune function. Wheat (Triticum aestivum L.) is a major food crop in China, to meet the nutritional demand of human body for Zn, it is necessary to increase the Zn concentration in wheat grains. To provide a theoretical basis and technical support for the production of high quality wheat grains enriched with Zn, effects of soil and foliar Zn application on agronomic traits, grain yield, and the concentration of Zn (in particular) and also other two beneficial micronutrients including iron (Fe) and selenium (Se) in wheat grains were investigated under field condition. The results showed that the number of wheat ears of per hectare increased from 4470 thousand to 5115 thousand by soil Zn application, with an increase of 14.4%. Soil and foliar Zn application increased the grain yields of wheat from 5419.5-6250.5 kg/hm² to 6372.0-6811.5 kg/hm² with an increase rate of 5.2%-17.6%. Simultaneously, it had non-significant effect on the concentration of Fe and Se in grains, but effectively increased the Zn concentration from 34.0-39.6 mg/kg to 44.6-46.6 mg/kg with an increase rate of 17.7%-32.9%, achieving the target value of biofortification recommended by the World Health Organization and other institutions and scientists (40-50 mg/kg). Therefore, the application of Zn via soil and foliar spraying could improve the nutritional quality of grain Zn while increasing wheat yield, which is an effective way to improve the quality and efficiency of wheat production and is worth popularizing in large scale.

Key words: Wheat, Micronutrient, Fertilization, Nutrition Fortification, Improve Quality and Efficiency

CLC Number:

S512.1

Wang Lan, Xia Haiyong, Kong Weilin, Xian Weihua, Ma Guoxing, Wang Zihao, Zhang Rongting, Li Haosheng, Gong Kuijie, Liu Kaichang. Effects of Soil and Foliar Zinc Application on Agronomic Traits, Grain Yield and Grain Zinc, Iron and Selenium Concentration of Wheat[J]. Journal of Agriculture, 2021, 11(7): 23-27.

Figures/Tables 5

References 25

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试验名称	试验处理	肥料用量或叶面喷施溶液组成
土施Zn肥	CK-不施Zn	0
土施Zn肥	土施Zn肥	30 kg ZnSO₄·7H₂O/hm²
叶面喷Zn	CK	对照
	叶面喷Zn	ZnSO₄·7H₂O (0.4%,w/v)+吐温20 (0.01%,v/v)
	叶面喷Zn和蔗糖	ZnSO₄·7H₂O (0.4%,w/v)+蔗糖(2.0%,w/v)+吐温20 (0.01%,v/v)

试验名称	试验处理	肥料用量或叶面喷施溶液组成
土施Zn肥	CK-不施Zn	0
土施Zn肥	土施Zn肥	30 kg ZnSO₄·7H₂O/hm²
叶面喷Zn	CK	对照
	叶面喷Zn	ZnSO₄·7H₂O (0.4%,w/v)+吐温20 (0.01%,v/v)
	叶面喷Zn和蔗糖	ZnSO₄·7H₂O (0.4%,w/v)+蔗糖(2.0%,w/v)+吐温20 (0.01%,v/v)

试验处理	穗数/(万穗/hm²)	穗粒数	千粒重/g	籽粒产量/(kg/hm²)	收获指数
CK-不施Zn	447.0b	32.9a	45.3a	5419.5b	0.53a
土施Zn肥	511.5a	32.9a	44.1a	6372.0a	0.54a

试验处理	穗数/(万穗/hm²)	穗粒数	千粒重/g	籽粒产量/(kg/hm²)	收获指数
CK-不施Zn	447.0b	32.9a	45.3a	5419.5b	0.53a
土施Zn肥	511.5a	32.9a	44.1a	6372.0a	0.54a

试验处理	锌/(mg/kg)	铁/(mg/kg)	硒/(μg/kg)
CK-不施Zn	39.6b	20.5a	29.7a
土施Zn肥	46.6a	18.8a	31.2a