Effective zinc mobilization to rice grains using rhizobacterial consortium

Author:

Vaid Sachin Kumar1,Srivastava Prakash Chandra2,Pachauri Satya Pratap2,Sharma Anita1,Rawat Deepa2,Shankhadhar Shailesh Chandra3,Shukla Arvind Kumar4

Affiliation:

1. a Department of Microbiology, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, India;

2. b Department of Soil Science, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, India;

3. c Department of Plant Physiology, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, India;

4. d Project Coordinator Micronutrients Unit, Indian Institute of Soil Science, Berasia Road, Bhopal, India

Abstract

Low Zn in staple food grains like rice is closely related to large scale Zn malnutrition in many countries of the World. Zinc biofortification of rice grains by some cost effective agronomic method is important for low income farmers. To explore the possibility of enhancing the bioavailability of Zn in rice grains besides higher yields of two cultivars, the combinations of varying Zn fertilizer doses with or without inoculation of rhizobacteria consortium under split plot design set up were evaluated in two years field trials. Microbial inoculation + 5 kg Zn ha-1 to I year rice crop resulted in the highest number of effective tillers, grain yields, Zn concentration and uptake in grains and straw and total Zn uptake in both years. Grain yield of rice during two years increased by 19.7-27.9 and 17.1-20.4 percent over control under treatments receiving microbial inoculation + 5 kg Zn ha-1 to I year rice and 5 kg Zn ha-1 alone to I year rice crop, respectively. The highest concentration of Zn (10.9-19.1 mg kg-1) and the lowest concentration of phytic acid (18.5-25.3 g kg-1) in dehulled rice grains were recorded with soil application of 5 kg Zn ha-1; however, the values were at par with those observed under microbial inoculation + 5 kg Zn ha-1 (12.0-17.0 mg Zn kg-1 and 19.2-26.9 g phytic acid kg-1). The percent utilization of soil applied Zn increased with microbial inoculation in both the years and it was relatively higher in NDR 359 as compared to PD 16.

Publisher

Brill

Subject

Plant Science,Agronomy and Crop Science,Ecology, Evolution, Behavior and Systematics

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