Effects of Arbuscular Mycorrhizal Fungi and Biogas Slurry Application on Plant Growth, Soil Composition, and Microbial Communities of Hybrid Pennisetum

Jiabang Cai, Qifan Ran, Jie Zhou, Ming Bi, Yang Liu, Sisi Yang, Yan Fan, Gang Nie () and Wei He ()
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Jiabang Cai: Department of Forage Breeding and Cultivation, College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
Qifan Ran: Institute of Grassland Sciences, Chongqing Academy of Animal Science, Chongqing 402460, China
Jie Zhou: Institute of Grassland Sciences, Chongqing Academy of Animal Science, Chongqing 402460, China
Ming Bi: Department of Forage Breeding and Cultivation, College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
Yang Liu: Department of Forage Breeding and Cultivation, College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
Sisi Yang: Department of Forage Breeding and Cultivation, College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
Yan Fan: Institute of Grassland Sciences, Chongqing Academy of Animal Science, Chongqing 402460, China
Gang Nie: Department of Forage Breeding and Cultivation, College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
Wei He: Institute of Grassland Sciences, Chongqing Academy of Animal Science, Chongqing 402460, China

Sustainability, 2024, vol. 16, issue 19, 1-15

Abstract: Biogas slurry with rich nutrients could be applied as fertilizer to improve nitrogen absorption and soil structure. Arbuscular mycorrhizal fungi (AMF) are beneficial soil microorganisms that establish mutualistic relationships with the plant roots. The purpose of this study was to study the effects of AMF and biogas slurry treatment on hybrid Pennisetum growth, soil chemical properties, and soil microorganisms. The results revealed that the biomass yield of hybrid Pennisetum was significantly increased after the application of biogas slurry, and it reached the peak values when the biogas slurry dosage was 900 t/hm 2 , which were 13,216.67 kg/hm 2 and 13,733.33 kg/hm 2 in AMF− and AMF+ treatment groups, respectively. Moreover, biogas slurry treatment has a significant promoting effect on other agronomic traits related to biomass yield. As for soil chemical indicators, the contents of total nitrogen, nitrate nitrogen, ammonia nitrogen, and available phosphorus in the soil increased with the increase in biogas slurry application, while the soil organic matter was decreased. The addition of arbuscular mycorrhizal fungi significantly increased the species diversity of soil fungi with no biogas slurry application. Furthermore, when biogas slurry was applied, it had no significant effect on soil microbial diversity and composition, no matter the AMF+ or AMF− treatment. The research results can provide a reference for the long-term utilization of biogas slurry and it also can be used in the actual production of hybrid Pennisetum .

Keywords: biogas slurry; AMF; hybrid Pennisetum; agronomic characters; soil microorganism; soil (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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