Scientia Agricultura Sinica ›› 2024, Vol. 57 ›› Issue (14): 2815-2826.doi: 10.3864/j.issn.0578-1752.2024.14.010

• SOIL & FERTILIZER·WATER-SAVING IRRIGATION·AGROECOLOGY & ENVIRONMENT • Previous Articles     Next Articles

Response of Wheat Zinc Nutrition to Zinc Fertilization into Soils with Variable Available Zinc

HUANG TingMiao1,2(), LU NaiKun1, XIE BingQiang1, CAO HanBing3, QIAO YueJing1, YANG ZhenPing1, GAO ZhiQiang1, LI TingLiang3()   

  1. 1 College of Agronomy, Shanxi Agricultural University/Ministerial and Provincial Co-Innovation Centre for Endemic Crops Production with High-quality and Efficiency in Loess Plateau, Taigu 030801, Shanxi
    2 College of Natural Resources and Environment, Northwest A&F University/Key Laboratory of Plant Nutrition and Agro-Environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, Shaanxi
    3 College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, Shanxi
  • Received:2024-02-08 Accepted:2024-04-08 Online:2024-07-16 Published:2024-07-24
  • Contact: LI TingLiang

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Abstract:

【Objective】 The objective of this study was to clarify the response of soil available zinc (Zn) and wheat grain Zn concentration to soil Zn fertilization under different Zn supply field conditions, and to explore the Zn fertilizer regulation measures for grain Zn fortification based on soil available Zn, so as to provide a scientific basis for optimizing Zn fertilizer application and achieving wheat grain with high-yield and high-quality. 【Method】 The two-year location-fixed field experiments with five Zn fertilizer application rates of 0, 6, 12, 18, and 24 kgZn·hm-2 were carried out at Taigu (high-Zn field) and Wanrong (low-Zn field) of Shanxi Province in the eastern Loess Plateau, respectively. The wheat grain yield and Zn concentration, Zn uptake and its translocation and distribution in the aerial part, as well as soil available Zn were investigated in the high- and low-Zn fields. 【Result】 Grain yield was not affected by Zn fertilizer rates in both high- and low-Zn fields. In high-Zn field, a slight increase in grain Zn concentration was observed with the increase of Zn fertilizer rates. For grain Zn concentration, no significant difference existed among all treatments in the first year, while it was increased by 2.4%-11.0% for Zn fertilization treatments as compared with that of no Zn fertilization in the second year. The grain Zn concentration was higher than 40 mg·kg-1 for all treatments. Compared with Zn application, the Zn transfer factor from straw to grain and grain Zn portioning index were decreased by 23.9%-37.9% and 4.3%-13.1%, respectively, and more than 20% of shoot Zn still remained in the stems and leaves at wheat harvest. In low-Zn field, the grain Zn concentration and Zn uptake in each organ increased with increasing Zn rates, whereas the opposite trend was observed for Zn transfer factor from straw to grain. Compared with no Zn application, the grain Zn concentration averaged two years increased by 9.4%-23.1%, while the Zn transfer factor from straw to grain decreased by 13.5%-24.5%, but no obvious difference was found for Zn portioning index among five Zn rates. In both high- and low-Zn fields, the soil available Zn increased significantly with the added Zn fertilizer. The regression analysis showed that soil available Zn slightly increased grain Zn concentration, and the increase with available Zn could be described by a quadratic function in high-Zn field, and the linear-with-plateau model showed that the grain Zn plateau of 34.76 mg·kg-1 was reached at the soil available Zn of 4.12 mg·kg-1. 【Conclusion】 Therefore, for the purpose of achieving desirable grain Zn concentration of 40 mg·kg-1 in the wheat monoculture aera of eastern Loess Plateau, it could be considered that higher soil available Zn played a critical role in the high-Zn field, and soil Zn fertilization could be considered to increase soil available Zn up to 4 mg·kg-1 first, and then other agronomic measures such as foliar Zn application should not be ignored to address the gap between the current grain Zn concentration and the recommended value in the low-Zn field.

Key words: wheat, soil Zn application, soil available Zn, grain Zn concentration, Zn translocation and distribution, Loess Plateau

Fig. 1

Monthly precipitation and average temperature at Taigu and Wanrong county during experimental period"

Table 1

Basic physicochemical properties at 0-20 cm soil layer before wheat sowing at two sites"

试验点
Experimental site		 pH 有机质
Organic matter
(g·kg-1)		 全氮
Total N
(g·kg-1)		 矿质氮
Mineral N
(mg·kg-1)		 有效磷
Olsen-P
(mg·kg-1)		 速效钾
Available K
(mg·kg-1)		 有效锌
Available Zn
(mg·kg-1)
太谷 Taigu 8.43 25.9 11.3 48.3 19.5 151.2 8.11
万荣 Wanrong 8.44 9.71 0.58 6.17 8.15 115.6 0.51

Fig. 2

Grain yield affected by Zn fertilizer rates applied into soil under conditions of high- and low-Zn wheat fields, respectively Zn0, Zn6, Zn12, Zn18, Zn24 indicate Zn fertilizer application rates of 0, 6, 12, 18, 24 kg Zn·hm-2, respectively. The same as below. Different lowercase letters above the bars indicate significant difference among five treatments level in the same year (P<0.05)"

Fig. 3

Grain Zn concentration affected by Zn fertilizer rates applied into soil under conditions of high- and low-Zn wheat fields, respectively"

Fig. 4

Zn accumulation in each organ of wheat aerial part affected by Zn fertilizer rates applied into soil under conditions of high- and low-Zn wheat fields, respectively Different uppercase and lowercase letters indicate significant difference within Zn accumulation in aerial part and each organ among five treatments at the 0.05 probability level in the same year, respectively"

Table 2

Zn transfer factor from straw to grain and Zn portioning index affected by different Zn fertilizer rates applied into soil under conditions of high- and low-Zn wheat fields, respectively"

小麦种植
Wheat
growing 		处理
Treatment		 锌转运系数 Zn transfer factor 锌分配指数 Zn portioning index (%)
（秸秆-籽粒） (Straw-grain) 籽粒 Grain 茎叶 Stem 颖壳 Glume
高锌田块
High-Zn field		 低锌田块
Low-Zn field		 高锌田块
High-Zn field		 低锌田块
Low-Zn field		 高锌田块
High-Zn field		 低锌田块
Low-Zn field		 高锌田块
High-Zn field		 低锌田块
Low-Zn field
第1年
The first year		 Zn0 2.17 a 6.21 a 65.40 a 84.64 a 25.92 a 9.29 a 8.68 a 6.06 a
Zn6 1.71 a 5.24 ab 61.31 a 82.75 a 31.75 a 11.67 a 6.94 a 5.58 a
Zn12 1.93 a 4.85 b 61.80 a 82.85 a 30.79 a 11.06 a 7.41 a 6.09 a
Zn18 1.85 a 4.91 b 60.12 a 81.97 a 32.01 a 12.43 a 7.87 a 5.60 a
Zn24 1.85 a 4.49 b 63.99 a 81.31 a 28.61 a 12.98 a 7.40 a 5.71 a
第2年
The second year		 Zn0 2.72 a 4.82 a 75.58 a 77.24 a 17.97 b 14.20 a 6.45 a 8.56 a
Zn6 2.07 b 4.30 ab 71.74 ab 75.55 a 21.94 ab 14.76 a 6.32 a 9.69 a
Zn12 2.06 b 3.74 b 69.71 ab 74.40 a 23.44 ab 16.14 a 6.86 a 9.45 a
Zn18 2.05 b 4.02 ab 72.31 ab 74.25 a 20.79 ab 15.06 a 6.90 a 10.69 a
Zn24 1.69 b 3.84 ab 65.66 b 73.63 a 27.99 a 15.45 a 6.35 a 10.93 a
变异来源 Source of variations
年份Year NS NS * NS * * NS *
处理Treatment NS * NS NS NS NS NS NS
年份×处理
Year×Treatment		 NS NS NS NS NS NS NS NS

Fig. 5

Soil available Zn concentration at 0-20 cm soil layer affected by Zn fertilizer rates applied into soil under conditions of high- and low-Zn wheat fields, respectively Different lowercase letters above the bars indicate significant difference among five treatments level in the same year P<0.05"

Fig. 6

Relationships of grain Zn concentration and soil available Zn content at 0-20 cm soil layer under conditions of high- and low-Zn wheat fields, respectively"

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