An Asian Journal of Soil Science

Pawan Kumar Srivastwa ¹, Kanhaiyaji Verma ¹, Nishi Kumari ²

Affiliations
1 Department of Botany, J.P. University, Chapra (Bihar), IN
2 Department of Soil Science, Tirhut College of Agriculture (R.A.U.), Dholi (Bihar), IN

Abstract

Plant growth promoting rhizobacteria (PGPR) are a group of beneficial bacteria that are associated with ischolar_mains of plants and their rhizosphere. Most of the PGPR have been known for N₂ fixation, IAA Production, Phosphate-solubilisation and Siderophore production. This study was conducted with nine isolates of Azotobacter, isolated from salt affected soil. The observation were made on T₁ (Control), T₂ (N_1/2P_1/2K + KBH_12A) and T₃ (N_1/2P_1/2K + mixed culture of KBH_12A, KBH_18A, KBA_2A, KBA_13A, MMA_3A, MMA_14B, MMA_19B, MBA_8A, and MBA_20B). The experiments on rice were carried in Randomized Block Design (RBD) with three replication. In the present investigation an attempt has been made to ascertain the effect of PGPR in different plant parameter such as impact on shoot and ischolar_main length, impact on number of tillers and ischolar_main and impact on flowering.

Keywords

Plant Growth Promoting Bacteria, N₂ Fixation, IAA Production, Phosphate- Solubilisation, Siderophore Production.

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Sudhanshu Bhooshan ¹, Awadh Kishor Prasad ¹, Pawan Kumar Srivastwa ²

Affiliations
1 Department of Soil Science, Rajendra Agricultural University, Pusa, Samastipur (Bihar), IN
2 Department of Botany, Jai Prakash University, Chapra (Bihar), IN

Abstract

A field experiment was conducted in South Kisan Vidhya Peeth Block of Crop Research Centre of Rajendra Agricultural University, Bihar, Pusa (Samastipur) during the Rabi season of 2011-12. The experimental plot was medium land, properly leveled, and well drained with uniform topography. The experiment was conducted in a Split plot design with 30 treatments, which were replicated three times. To study the effect on nutrient uptake by maize (Zea mays L.) crop after using integrated management of organic manure with rice-crop establishment methods. The main plot treatments consisting of six methods of rice-crop establishment A₁ (ZT), A₂ (DS), A₃ (PDS), A₄ (PT), A₅ (SRI) and A₆ (PT + BM) and the sub plot treatments consisting of five different form of the organic matter enrichment i.e. B₁ (M), B₂ (Vc), B₃ (1/3CR),B₄ (M+Vc) and B₅ (control).

Keywords

Winter Maize, Physical Property, Zero Tillage, Dry Seeded, Drum Seeder, Puddled Transplanted, System of Rice-Intensification, Brown Manuring, Mulching, Vermi Compost and Crop Residue.

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Pawan Kumar Srivastwa ¹, Kanhaiyaji Verma ¹

Affiliations
1 University Department of Botany, J.P. University, Chapra (Bihar), IN

Abstract

The study was designed to isolate and characterize nutrient mobilizing soil microbes from salt affected soil of north Bihar. Out of 43 total 17 isolates of Azospirillum (12) and PSB (5) were selected in which, all the isolates produced one or the other different characteristics involved in plant growth promotion. They produced phytohormones like indole acetic acid, Phospho-solubilization, siderophore and N2 fixation. The observations were made with 21 treatments. The experiments on rice were carried in Randomized Block Design (RBD) with three replications. In the present investigation an attempt has been made to ascertain the effect of PGPR in different plant parameter such as tillers, effective tillers, plant height, panicle length, grain yield, straw yield and test weight.

Keywords

Salt-Affected Soil, Rice, Azospirillum, Phosphorus.

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