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Fertility Impact of Separate and Combined Treatments with Biochar, Sewage Sludge Compost and Bacterial Inocula on Acidic Sandy Soil

Uzinger, Nikolett and Takács, Tünde Mária and Szili Kovács, Tibor and Radimszky, László and Füzy, Anna and Draskovits, Eszter and Szűcs-Vásárhelyi, Nóra and Molnár, Mónika and Farkas, Éva and Kutasi, József and Rékási, Márk (2020) Fertility Impact of Separate and Combined Treatments with Biochar, Sewage Sludge Compost and Bacterial Inocula on Acidic Sandy Soil. AGRONOMY, 10 (10). ISSN 2073-4395

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Abstract

The short-term effects of processed waste materials: sewage sludge compost (up to 0.5%), biochar made of paper sludge and grain husk (BC) (up to 2%) combined with plant growth-promoting rhizobacterial (PGPR) inoculum, on the fertility of acidic sandy soil at 65% of field capacity were tested in a pot experiment in separate and combined treatments. The soil pH, organic matter content, total and plant-available nutrients, substrate-induced respiration, arbuscular mycorrhizal fungal (AMF) root colonisation parameters and maize (Zea mays L.) biomass were investigated in experiments lasting two months. The positive priming (21% organic matter loss) induced by BC alone was not observed after combined application. The combination of compost and PGPR with 1.5% BC resulted in 35% higher P and K availability due to greater microbial activity compared to BC alone. Only compost applied alone at 0.5% gave a 2.7 times increase in maize biomass. The highest microbial activity and lowest AMF colonisation were found in combined treatments. In the short term the combined application of BC, compost and PGPR did not result in higher fertility on the investigated soil. Further research is needed with a wider range of combined treatments on acidic sandy soil for better understanding of the process.

Item Type: Article
Uncontrolled Keywords: ZEA MAYS; fertilisation; PGPR; soil amelioration; waste reutilisation;
Subjects: Q Science / természettudomány > QD Chemistry / kémia
Q Science / természettudomány > QH Natural history / természetrajz > QH301 Biology / biológia
S Agriculture / mezőgazdaság > S1 Agriculture (General) / mezőgazdaság általában > S590 Soill / Talajtan
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 18 Mar 2021 13:20
Last Modified: 18 Mar 2021 13:20
URI: http://real.mtak.hu/id/eprint/122548

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