Ghadimi, Mehdi (2021) Effect of vermicompost, cow manure, rice residual and Azolla integrated with plant growth promoting rhizobacteria on yield and some ecophysiological characteristics of rice. Doctoral thesis, University of Zabol.
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Effect of vermicompost, cow manure, rice residual and Azolla integrated with plant growth promoting rhizobacteria on yield and some ecophysiological characteristics of rice.pdf Download (139kB) | Preview |
Abstract
A field experiment was conducted in a paddy soil in 2018-2017 for investigating the effect of vermicomposting of cow manure mixture with Azolla and rice straw on soil microbial activity, nutrient uptake and grain yield under inoculation of N2-fixing bacteria. Experimental factors consisted of organic amendments in six levels (vermicomposts prepared from manure (VM); manure + rice straw (VRM); manure + Azolla mixture (VAM); manure + rice straw + Azolla mixture (VRAM); raw manure without vermicomposting (M) and a control) and N2- fixing bacteria in three levels (Azotobacter chroococcum, Azospirillum brasilence and noninoculation). The results showed that vermicompostic treatments compared to control and raw manure significantly increased the number and biomass-C of soil microorganisms, urease activity, number of tillers hill-1, phosphorus (P) and potassium (K) uptake, and grain and protein yield. Inoculation of plants with N2-fixing bacteria, especially Azotobacter, increased the efficiency of organic amendments, so that the maximum urease activity, soil microbial activity, P and N uptake and grain yield (4667 (2017) and 5081 (2018) kg ha-1) were observed in vermicompost treatments containing Azolla (VAM and VRAM) under inoculation with Azotobacter. The results suggest that an organic source for vermicompost has a great effect on enzyme activity, soil biology, nutrient uptake and grain yield, by inoculation with appropriate N2-fixing bacteria, has a synergistic interaction on agronomic traits under flooded conditions. Therefore, this nutrient method can be used as one of the nutrient management strategies in the sustainable rice production.
| Item Type: | Thesis (Doctoral) |
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| Uncontrolled Keywords: | Azolla; cow manure; grain yield; microbial activity; paddy soil |
| Subjects: | S Agriculture > SB Plant culture |
| Depositing User: | Mrs najmeh khajeh |
| Date Deposited: | 08 Oct 2022 07:57 |
| Last Modified: | 08 Oct 2022 07:57 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/3180 |
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