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<p>Organic materials (OM) such as farmyard manure (FYM) and mungbean residue (MR) are used to improve soil nutrient stock and act as an alternative to fertilizers. It was hypothesized that integrating beneficial microbes (BM) with OM will enhance carbon and nitrogen mineralization, offering a novel approach for optimizing soil fertility and nutrient cycling.&#xa0;The experiment was conducted in a completely randomized design (CRD) having factorial combination of five OM sources (control (CON), poultry manure (PM), FYM, compost (COM), and MR at the rate of 120&#xa0;kg N ha<sup>-1</sup>) and four levels of BM ( i.e. 0, 100, 200, and 300&#xa0;L ton<sup>-1</sup> of OM) in microcosm for 112 days in airtight vials incubated at 25&#xa0;°C. Destructive soil samplings were analyzed for total nitrogen (TN), mineral nitrogen (MN), organic carbon (SOC), electrical conductivity (EC), pH, microbial respiration (SMR), and microbial biomass carbon (MBC), while net mineral N release and losses were calculated on a mass basis.&#xa0;The incubation interval had increased the soil TN, SMN, SOC, MBC and SMR by 26, 2, 28, 7 and 82% respectively on 112 days as compared to 1st day. FYM improved SMR, SOC, and MBC by 146, 58, and 40% respectively over CON. Net mineral N availability peaked at 14 days with PM/FYM. Gaseous N losses followed the order of MR &gt; PM &gt; FYM &gt; COM &gt; CON. Compost performed well at lower levels of BM, whereas PM, FYM, and MR at higher levels in terms of soil fertility.&#xa0;Compost with 200&#xa0;L BM ton<sup>-1</sup> or manure (PM/ FYM) and MR with 300&#xa0;L BM ton<sup>-1</sup> of OM should be applied at least 7, 14, and 28 days, respectively before sowing of the crop for enhancing nutrient cycling, microbial activity and soil fertility. Thus, manure-based amendment cycles nutrients faster than plant-based amendment.</p>

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Nutrients Cycling and Nitrogen Losses Depend on the Lability of the Organic Matter Sources Amended with Beneficial Microbes

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Sajid Khan,
  • Ahmad Khan,
  • Florian Wichern

摘要

Organic materials (OM) such as farmyard manure (FYM) and mungbean residue (MR) are used to improve soil nutrient stock and act as an alternative to fertilizers. It was hypothesized that integrating beneficial microbes (BM) with OM will enhance carbon and nitrogen mineralization, offering a novel approach for optimizing soil fertility and nutrient cycling. The experiment was conducted in a completely randomized design (CRD) having factorial combination of five OM sources (control (CON), poultry manure (PM), FYM, compost (COM), and MR at the rate of 120 kg N ha-1) and four levels of BM ( i.e. 0, 100, 200, and 300 L ton-1 of OM) in microcosm for 112 days in airtight vials incubated at 25 °C. Destructive soil samplings were analyzed for total nitrogen (TN), mineral nitrogen (MN), organic carbon (SOC), electrical conductivity (EC), pH, microbial respiration (SMR), and microbial biomass carbon (MBC), while net mineral N release and losses were calculated on a mass basis. The incubation interval had increased the soil TN, SMN, SOC, MBC and SMR by 26, 2, 28, 7 and 82% respectively on 112 days as compared to 1st day. FYM improved SMR, SOC, and MBC by 146, 58, and 40% respectively over CON. Net mineral N availability peaked at 14 days with PM/FYM. Gaseous N losses followed the order of MR > PM > FYM > COM > CON. Compost performed well at lower levels of BM, whereas PM, FYM, and MR at higher levels in terms of soil fertility. Compost with 200 L BM ton-1 or manure (PM/ FYM) and MR with 300 L BM ton-1 of OM should be applied at least 7, 14, and 28 days, respectively before sowing of the crop for enhancing nutrient cycling, microbial activity and soil fertility. Thus, manure-based amendment cycles nutrients faster than plant-based amendment.