Role of Zinc Solubilizing Bacteria in Enhancing Growth and Nutrient Accumulation in Rice Plants (Oryza sativa) Grown on Zinc (Zn) Deficient Submerged Soil
Zinc (Zn) is a mineral that is required for normal plant and human metabolism; nevertheless, Zn deficiency in soil poses a significant threat to long-term agricultural productivity. In this investigation, the impacts of zinc solubilizing bacteria (ZSB) on Zn release, rice plant growth, and yield par...
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Published in | Journal of soil science and plant nutrition Vol. 22; no. 1; pp. 971 - 984 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Cham
Springer International Publishing
01.03.2022
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Zinc (Zn) is a mineral that is required for normal plant and human metabolism; nevertheless, Zn deficiency in soil poses a significant threat to long-term agricultural productivity. In this investigation, the impacts of zinc solubilizing bacteria (ZSB) on Zn release, rice plant growth, and yield parameters in the Zn-deficient submerged soil were evaluated. The Zn solubilization capacity of five different bacterial isolates was tested, followed by an incubation study that was conducted for 9 weeks under the submerged condition in the Zn-deficient calcareous sandy clay loam soil. A field experiment was conducted in Zn-deficient soil with randomized block design and replicated thrice to find out the impact of two Zn sources, viz., zinc carbonate (ZnCO
3
) and zinc sulfate (ZnSO
4
) with the efficient ZSB on rice growth and Zn accumulation in the rice grains. Out of five tested bacterial isolates,
Bacillus aryabhattai
KSB N
2
K
7
released the significantly higher amount of Zn in the liquid medium amended with insoluble Zn sources, such as zinc oxide (ZnO) and zinc carbonate (ZnCO
3
) of 185.7 mg L
–1
and 185.4 mg L
–1
, respectively. The incubation study revealed that the application of ZnSO
4
(25 kg ha
–1
) with
B
.
aryabhattai
KSB N
2
K
7
showed a significantly higher range of Zn release (3.81 to 5.12 mg kg
–1
) during 9 weeks of incubation as compared with that of ZnCO
3
(11 kg ha
–1
) with
B
.
aryabhattai
KSB N
2
K
7
(3.52 to 4.48 mg kg
–1
). The application of Zn sources with
B
.
aryabhattai
KSB N
2
K
7
resulted in a significant increase in plant biometrics. The application of 25 kg ZnSO
4
per hectare with
B
.
aryabhattai
KSB N
2
K
7
resulted in the significantly higher grain yield of 5806 kg ha
–1
than that of treatment containing recommended dose of fertilizers alone. The application of 25 kg ZnSO
4
per hectare with
B
.
aryabhattai
KSB N
2
K
7
registered significantly higher Zn accumulation in grain compared to all other treatments. Thus, the results demonstrated the crucial role of
Bacillus aryabhattai
KSB N
2
K
7
in Zn release and rice fortification in the Zn-deficient submerged soil. |
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ISSN: | 0718-9508 0718-9516 |
DOI: | 10.1007/s42729-021-00706-7 |