Nutrient use efficiency and nutrient uptake promoting of rice by potassium solubilizing bacteria (KSB)

M. Yaghoubi Khanghahi; H. Pirdashti; H. Rahimian; G.A. Nematzadeh; M. Ghajar Sepanlou

doi:10.1556/0806.46.2018.042

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Cereal Research Communications

Volume/Issue:: Volume 46: Issue 4

Nutrient use efficiency and nutrient uptake promoting of rice by potassium solubilizing bacteria (KSB)

Authors:

M. Yaghoubi Khanghahi

M. Yaghoubi Khanghahi Genetics and Agricultural Biotechnology Institute of Tabarestan and Sari Agricultural Sciences and Natural Resources University, Sari, Iran

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H. Pirdashti

H. Pirdashti Genetics and Agricultural Biotechnology Institute of Tabarestan and Sari Agricultural Sciences and Natural Resources University, Sari, Iran

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H. Rahimian

H. Rahimian Sari Agricultural Sciences and Natural Resources University, Sari, Iran

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G.A. Nematzadeh

G.A. Nematzadeh Genetics and Agricultural Biotechnology Institute of Tabarestan and Sari Agricultural Sciences and Natural Resources University, Sari, Iran

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, and

M. Ghajar Sepanlou

M. Ghajar Sepanlou Sari Agricultural Sciences and Natural Resources University, Sari, Iran

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Pages:: 739–750

Online Publication Date:: Dec 2018

Publication Date:: 01 Dec 2018

Article Category:: Research Article

DOI:: https://doi.org/10.1556/0806.46.2018.042

Keywords:: nutrient remobilization; nutrient use efficiency; nutrient uptake; potassium solubilizing bacteria

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The current study was carried out in both pot and field conditions to investigate the effects of three KSB strains of Pantoea agglomerans, Rahnella aquatilis and Pseudomonas orientalis on nitrogen (N), phosphorous (P) and potassium (K) uptake, nutrient use efficiency parameters and nutrients remobilization in rice (Oryza sativa L. cv. Pajohesh). The experiments included 15 treatments of KSB inoculations, commercial K biofertilizer and K chemical fertilizer. The results showed that the inoculums of all three KSB strains increased the K, N and P uptake by grain and straw, especially when applied in combination with ½ K chemical fertilizer (47.5 Kg/ha) as compared to the control treatment. The highest value of available K in the soil obtained from NPK chemical fertilizer equal to 140.1 and 134.6 mg K per kg of soil in the pot and field experiments, respectively, which were significantly higher than KSB inoculations treatments. Bacterial inoculums coupled with ½ K chemical fertilizer also enhanced the nutrient use efficiency (including agronomic efficiency (AE), apparent recovery efficiency (ARE), physiological efficiency (PE), agro-physiological efficiency (APE), internal utilization efficiency (UE), partial factor productivity (PFP), partial nutrient balance (PNB)) and nutrient remobilization. The results indicated that the bioinoculation with these KSB strains isolated from soil paddy could be considered as an effective way to increase potassium, nitrogen and phosphorus uptake by rice plant and enhance their use efficiency and remobilization to grains in the flooding irrigation conditions.

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Cereal Research Communications A Quarterly of the Cereal Research Non-Profit Ltd. Company

Print ISSN:: 0133-3720

Online ISSN:: 1788-9170

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Cereal Research Communications
Language	English
Size	A4
Year of Foundation	1973
Volumes per Year	1
Issues per Year	4
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0133-3720 (Print)
ISSN	1788-9170 (Online)