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Forskningsartikel2023Vetenskapligt granskadÖppen tillgång

Improving Phosphorus Availability and Wheat Yield in Saline Soil of the Lake Urmia Basin through Enriched Biochar and Microbial Inoculation

Mousavi, Roghayeh; Rasouli-Sadaghiani, MirHassan; Sepehr, Ebrahim; Barin, Mohsen; Vetukuri, Ramesh Raju

Sammanfattning

To reduce requirements for conventional chemical fertilizer and alleviate salinity stress in soils, a glasshouse experiment was conducted to assess the effects of enriched biochar on phosphatase activity, microbial respiration and wheat yield in non-saline and saline soils from the Lake Urmia basin (electrical conductivities 2 dS.m(-1) and 15 dS.m(-1), respectively). Nine treatments were tested: control, 1:1 mixture of apple and grape biochars (BC), phosphate solubilizing bacteria (PSB), BC plus PSB (BC-PSB), BC plus rock phosphate (BC-RP), BC enriched by rock phosphate and bacteria (BC-RP-PSB), BC enriched by rock phosphate and HCl (BC-RP-HCl) or H3PO4 (BC-RP-H3PO4) and chemical fertilizer (TSP). The addition of enriched biochar decreased the soil pH (by 0.5-0.9 units) and increased available phosphorus (>7-fold). In both the saline and non-saline soils, the highest alkaline phosphatase activity was obtained for BC-H3PO4-RP and BC-HCl-RP. Wheat growth parameters were reclaimed after enriched biochar application, indicating superior dry matter yields compared to the control and non-enriched biochar treatments and significantly higher yields compared to TSP. Beneficial effects on soil pH, phosphatase activity, soil respiration and biomass yield demonstrated that enriched biochar could partly substitute chemical fertilizers and increase plant growth in salt stress conditions. However, further field studies are needed to understand the benefits of enriched biochar in different soils and climates.

Nyckelord

agricultural residue; enriched biochar; soil enzyme; salt-affected soil; wheat fertilization

Publicerad i

Agriculture
2023, Volym: 13, nummer: 4, artikelnummer: 805
Utgivare: MDPI

    Associerade SLU-program

    SLU Nätverk växtskydd

    UKÄ forskningsämne

    Markvetenskap

    Publikationens identifierare

    DOI: https://doi.org/10.3390/agriculture13040805

    Permanent länk till denna sida (URI)

    https://res.slu.se/id/publ/122185