Crops ›› 2022, Vol. 38 ›› Issue (4): 107-114.doi: 10.16035/j.issn.1001-7283.2022.04.015

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Effects of Nano-Zinc and Ion-Zinc on Rice Yield Formation and Grain Zinc Content

Chen Shiyong1(), Wang Rui2, Chen Zhiqing2, Zhang Haipeng2, Wang Juanjuan1, Shan Yuhua1, Yang Yanju1()   

  1. 1College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, Jiangsu, China
    2Innovation Center of Rice Cultivation Technology in Yangtze River Valley, Ministry of Agriculture and Rural Affairs/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, Jiangsu, China
  • Received:2021-09-04 Revised:2021-11-21 Online:2022-08-15 Published:2022-08-22
  • Contact: Yang Yanju E-mail:1817198747@qq.com;006468@yzu.edu.cn

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Abstract:

In this study, pot experiments were carried out in 2018 and 2019 to examine the effects of nano-Zn and ion-Zn application (at dosages of 0, 7.5, 30 and 60kg/ha) on rice yield, yield components, and grain zinc accumulation. Nanjing 9108 rice cultivar with good taste quality was used as material. The influence of nano-Zn and ion-Zn on rice yield and its components and grain zinc accumulation was studied, which provides a scientific basis for the rational selection and application of rice zinc fertilizer. The results showed that both nano-Zn and ion-Zn application significantly increased rice yield by 1.3% and 11.9% compared with no zinc treatment, and rice grain yield increased with the increase of zinc application. Under the same condition of zinc application amount, the yield increase effect of nano-Zn was significantly higher than that of ion-zinc treatment due to the higher effective panicles number, spikelets per panicle and seed-setting rate of nano-Zn treatment. Compared with ion-Zn treatment, nano-Zn treatment significantly improved rice dry matter accumulation, leaf area index, net leaf photosynthetic rate, leaf stomatal conductance, intercellular CO2 concentration, and transpiration rate, thus promoting the formation of rice yield. Both nano-Zn and ion-Zn application significantly increased the grain zinc content and zinc accumulation compared with the control treatment. The nano-Zn treatment grain zinc content and zinc accumulation were increased by 4.5%-10.3% and 6.2%-15.4% compared with the ion-zinc treatment, respectively. In conclusion, for promoting rice grain yield and its components, compared with ion-Zn, nano-Zn had obvious advantages, and the application of nano-Zn could effectively improve the zinc content of grain, which could be used as an effective measure to improve the nutritional quality of rice.

Key words: Nano-zinc, Ion-zinc, Rice, Yield formation, Zinc content

Table 1

Effects of nano-zinc and ion-zinc on the yield and its components of rice"

年份
Year		 处理
Treatment		 有效穗数
Effective panicles number (×104/hm2)		 穗粒数
Spikelets per panicle		 千粒重
1000-grain weight (g)		 结实率
Seed-setting rate (%)		 实收产量
Harvest yield (t/hm2)
2018 CK 355.05±1.37c 105.96±0.34d 27.13±0.13a 91.17±0.44a 9.36±0.01c
T1 363.85±1.37bc 110.27±1.56c 27.21±0.13a 91.14±0.15a 9.48±0.01bc
T2 366.97±1.24abc 111.14±2.17c 27.17±0.05a 91.19±0.31a 9.61±0.00bc
T3 368.48±0.15abc 111.73±0.24c 27.22±0.02a 91.23±0.27a 9.73±0.02abc
T4 371.51±1.49ab 116.97±0.24b 27.40±0.12a 91.28±0.32a 9.59±0.01bc
T5 374.48±2.05ab 120.64±2.55b 27.44±0.01a 91.19±0.23a 9.77±0.01ab
T6 380.61±1.80a 125.07±0.23a 27.38±0.03a 91.56±0.23a 10.13±0.01a
2019 CK 352.50±0.64c 105.28±0.16d 27.11±0.07a 91.52±0.08a 9.55±0.02c
T1 369.10±0.38b 109.52±0.05cd 27.22±0.05a 92.02±0.12a 9.82±0.00bc
T2 369.80±0.56b 109.66±0.14cd 27.26±0.02a 92.26±0.07a 9.96±0.01ab
T3 372.00±0.98ab 111.25±0.06bc 27.39±0.03a 91.81±0.05a 10.22±0.01ab
T4 373.75±0.11ab 116.22±0.22ab 27.43±0.06a 92.15±0.11a 9.95±0.02ab
T5 377.57±0.95ab 118.47±0.03ab 27.45±0.05a 92.33±0.17a 10.39±0.01ab
T6 386.91±0.22a 123.14±0.28a 27.59±0.06a 92.39±0.23a 10.69±0.01a

Table 2

Effects of nano-zinc and ion-zinc on rice dry matter accumulation amount in 2018 t/hm2"

处理
Treatment		 干物质量Dry matter amount
拔节期
Jointing stage		 齐穗期
Heading stage		 成熟期
Maturity stage
CK 2.83±0.04e 8.26±0.31b 12.44±0.29b
T1 3.58±0.10d 8.91±0.35ab 14.60±0.59a
T2 3.84±0.05c 9.31±0.31a 14.88±0.35a
T3 3.92±0.11bc 9.46±0.36a 15.18±0.52a
T4 3.91±0.16bc 9.17±0.38a 14.83±0.60a
T5 4.06±0.06ab 9.41±0.43a 15.16±0.57a
T6 4.18±0.14a 9.57±0.46a 15.43±0.34a

Table 3

Effects of nano-zinc and ion-zinc on rice dry matter accumulation and proportion in different growth stage in 2018"

处理
Treatment		 播种―拔节Sowing-jointing 拔节―齐穗Jointing-heading 齐穗―成熟Heading-maturity
积累量
Accumulation (t/hm2)		 比例
Ratio (%)		 积累量
Accumulation (t/hm2)		 比例
Ratio (%)		 积累量
Accumulation (t/hm2)		 比例
Ratio (%)
CK 2.83±0.04e 22.72 5.43±0.33a 43.69 4.18±0.32b 33.60
T1 3.58±0.10d 24.53 5.33±0.36a 36.47 5.70±0.24a 39.00
T2 3.84±0.05c 25.82 5.47±0.26a 36.77 5.57±0.47a 37.41
T3 3.92±0.11bc 25.84 5.53±0.46a 36.46 5.72±0.38a 37.70
T4 3.91±0.16bc 26.37 5.26±0.54a 35.49 5.66±0.85a 38.14
T5 4.06±0.06ab 26.79 5.35±0.46a 35.27 5.75±0.35a 37.95
T6 4.18±0.14a 27.09 5.39±0.45a 34.96 5.86±0.80a 37.95

Fig.1

Effects of nano-zinc and ion-zinc on SPAD value of rice in 2018"

Table 4

Effects of nano-zinc and ion-zinc on leaf photosynthetic parameters of rice in 2018"

处理Treatment Pn [μmol/(m2·s)] Gs [mol/(m2·s)] Ci (μmol/mol) Tr [mmol/(m2·s)]
CK 13.93±0.53e 0.58±0.02e 279.62±4.83c 7.34±0.21c
T1 19.14±0.57d 0.81±0.03d 326.50±1.48a 9.37±0.20b
T2 20.61±0.15c 0.86±0.01c 320.69±6.23ab 9.38±0.09b
T3 22.21±1.60ab 0.92±0.02b 313.96±10.28b 10.05±0.39a
T4 21.22±0.50bc 0.86±0.01c 314.08±7.07b 10.30±0.24a
T5 22.58±0.18a 0.93±0.01b 319.59±3.73ab 10.40±0.42a
T6 22.92±0.13a 0.97±0.02a 320.08±5.59ab 10.48±0.19a

Table 5

Effects of nano-zinc and ion-zinc on rice LAI in 2018"

处理
Treatment		 拔节期
Jointing stage		 齐穗期
Heading stage		 成熟期
Maturity stage
CK 4.05±0.04d 7.13±0.12c 3.28±0.09c
T1 4.27±0.04c 7.38±0.08b 3.44±0.08bc
T2 4.47±0.00ab 7.38±0.08b 3.57±0.10a
T3 4.52±0.07ab 7.44±0.16ab 3.67±0.12a
T4 4.42±0.04b 7.42±0.07ab 3.58±0.11ab
T5 4.45±0.20ab 7.43±0.01ab 3.61±0.16ab
T6 4.58±0.01a 7.62±0.20a 3.78±0.11a

Table 6

Effects of nano-zinc and ion-zinc on zinc content and accumulation in rice grains"

处理
Treatment		 2018 2019
籽粒锌含量
Grain Zn content (mg/kg)		 籽粒锌积累
Grain Zn accumulation (g/hm2)		 籽粒锌含量
Grain Zn content (mg/kg)		 籽粒锌积累
Grain Zn accumulation (g/hm2)
CK 17.21±0.15e 161.11±1.00e 17.17±0.13c 163.94±6.01d
T1 18.62±0.29d 176.46±3.50d 19.12±0.44b 187.84±6.21c
T2 20.18±0.48c 194.01±5.07c 19.39±0.75b 193.12±10.48bc
T3 21.45±0.34b 208.70±10.56b 19.67±0.73b 200.92±13.96bc
T4 19.91±0.19c 190.91±7.67c 20.04±1.15b 199.41±4.20bc
T5 21.82±0.16b 213.14±3.89b 20.26±0.19b 210.52±11.26b
T6 22.62±0.45a 229.15±7.01a 21.70±0.29a 231.95±18.18a

Fig.2

Effects of zinc fertilizer application amount on zinc accumulation in rice grains"

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