Abstract
Due to the intensification of the poultry sector, poultry manure is being produced in increasing quantities, and its on-site management is becoming a critical problem. Animal health problems can be solved by stricter the veterinary and environmental standards. The off-site coupled industrial chicken manure recycling technology (Hosoya compost tea) fundamentally affects the agricultural value of new organic-based products. Due to the limited information available on manure recycling technology-related microbiological changes, this was examined in this study. A pot experiment with a pepper test plant was set up, using two different soils (Arenosol, slightly humous Arenosol) and two different doses (irrigation once a week with 40 mL of compost tea: dose 1, D1; irrigation twice a week with 40 mL of compost tea: dose 2, D2) of compost tea. Compost tea raw materials, compost tea, and compost tea treated soils were tested. The products (granulated manure, compost tea) and their effects were characterized by the following parameters: aerobic bacterial count (log CFU/g), fluorescein diacetate activity (3′,6′-diacetylfluorescein, FDA, µg Fl/g soil), glucosidase enzyme activity (GlA; PNP/µmol/g), and identification of microorganisms in compost tea with matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS). Furthermore, we aimed to investigate how the microbiological indicators tested, and the effect of compost tea on the tested plant, could be interpreted. Based on our results, the microbiological characteristics of the treated soils showed an increase in enzyme activity, in the case of FDA an increase +0.26 μg Fl/g soil at D1, while the GlA increased +1.28 PNP/µmol/g with slightly humous Arenosol soil and increased +2.44 PNP/µmol/g at D1; and the aerobic bacterial count increased +0.15 log CFU/g at D2, +0.35 log CFU/g with slightly humous Arenosol and +0.85 log CFU/g at W8. MALDI-TOF MS results showed that the dominant bacterial genera analyzed were Bacillus sp., Lysinibacillus sp., and Pseudomonas sp. Overall, the microbial inducers we investigated could be a good alternative for evaluating the effects of compost solutions in soil–plant systems. In both soil types, the total chlorophyll content of compost tea-treated pepper (Capsicum annuum L.) had increased as a result of compost tea. D1 is recommended for Arenosol and, D2 for slightly humous Arenosol soil.
Highlights
The quick spread of intensive agricultural systems, the use of fertilizers, and rapid human population growth have had negative effects on soil fertility, mainly decreasing the soil organic carbon and the total soil nitrogen, and changing the composition of carbon and nitrogen, owing to the loss of soil organic matter through erosion and leaching [1,2], and resulting in unsustainable soil degradation [3,4]
Compost tea, and compost tea treated soils were tested. The products and their effects were characterized by the following parameters: aerobic bacterial count, fluorescein diacetate activity (FDA, μg Fl/g soil), glucosidase enzyme activity (GlA; PNP/μmol/g), and the identification of microorganisms in compost tea with MALDI-TOF MS
The highest total chlorophyll content was measured for D2W8 (4249.62 ± 458.76 μg/g), and the lowest total chlorophyll content was measured for the control (3379.17 ± 310.64 μg/g). These results demonstrate that the compost solution applied on slightly humous Arenosol soil had a positive effect on the total chlorophyll content of the pepper
Summary
The quick spread of intensive agricultural systems, the use of fertilizers, and rapid human population growth have had negative effects on soil fertility, mainly decreasing the soil organic carbon and the total soil nitrogen, and changing the composition of carbon and nitrogen, owing to the loss of soil organic matter through erosion and leaching [1,2], and resulting in unsustainable soil degradation [3,4]. Over the last few decades there have been rapid changes in livestock production, with 61% of pork, 81% of poultry, and 86% of eggs produced on intensive, industrial farms [7]. African swine fever led to an increase in demand for poultry meat. This market is further complicated by the increase in EU internal production, the UK’s exit from the EU, and the increased quota for Ukrainian poultry meat. The outbreak of avian influenza in Central Europe in December 2019 limited the production in 2020 in terms of volume and has posed a major challenge for the animal health system and the poultry sector. It is necessary to establish a system of biodegradable organic matter management that focuses on the cycling of organic matter to maintain soil fertility in the long term and that creates a shared interest between crop and livestock farmers in the use of animal manure [15]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
