Effects of carbon-based additives and ventilation rate on nitrogen loss and microbial community during chicken manure composting

Abstract

Aerobic composting is a sustainable method for chicken manure recycling, while its unsuitable porosity and carbon to nitrogen ratio (C/N) may result in high nitrogen loss and incomplete composting. With the aim to investigate the effects of carbon-based additives and two ventilation rates on chicken manure composting and microbial community, two series of treatments were set up for chicken manure composting, in order to investigate their effects on the biodegradation process, ammonia (NH 3) emission, nitrogen loss, physiochemical properties and microbial community. The results showed that additives and ventilation rates set in the current study influenced the carbon dioxide (CO 2) production from the 2 nd week and also the physiochemical parameters during the entire process, while no inhibitory effect on the maturity were observed. With woody peat as additive, the NH 3 emission amount and nitrogen loss rate were shown as 15.86 mg and 4.02%, less than those in other treatments, 31.08-80.13 mg and 24.26-34.24%, respectively. The high aeration rate increased the NH 3 emission and nitrogen loss, which were varied when the additives were different. The terminal restriction fragment length polymorphism (T-RFLP) results showed that the additives and the ventilation rates changed the microbial community, while the prominent microbial clones belonged to the class of Bacilli and Clostridia (in the phylum of Firmicutes), and Alphaproteobacteria, Deltaproteobacteria and Gammaproteobacteria (in the phylum of Proteobacteria). Bacillus spp. was observed to be the most dominant bacteria in all the composting stages and treatments. It was concluded that woody peat could improve chicken manure composting more than other additives, especially on reducing nitrogen loss, meanwhile 0.18 L�min-1 �kg-1 DM was suitable for various additives. Therefore, suitable additive and aeration rate could be used in practical application, which could significantly reduce nitrogen loss without influence on the compos maturity process.

Effects of the Rapid Construction of a High-Quality Plough Layer Based on Woody Peat in a Newly Reclaimed Cultivated Land Area

“…The level of soil electrical conductivity is positively correlated with water-soluble NH 4 + , HCO 3 − , Na + , SO 4 2− , K + , Ca 2+ , and Mg 2+ and, given that humic acid [53,54] contains various functional groups, "After applying humic acid, the release of nutrients slows down, and the mineral-organic complex formed is conducive to facilitating the buffering effect of soil to salt" [55,56], effectively inhibiting the increase in base ions, such as K + , Ca 2+ , and Mg 2+ , to reduce soil conductivity. Thus, the application of humic acid in different optimization models contributes to the stabilization of soil conductivity [26,57].…”

Soil and crop microbiome under soil amendment with poultry manure compost

“…. Так, подробно было изучено влияние влажности исходного материала (Li et al, 2021), природы растительных остатков, используемых для компостирования (Бикташева и др., 2016; Wan et al, 2020), остатков молотого кофе (Emmanuel et al, 2017), микробных инокулятов (Бикташева и др., 2016), вентилирования (Chang et al, 2020) и т.д. Очень активно изучают влияние добавок различных микроорганизмов на эффективность компостирования.…”

Effectiveness of Using Chicken Manure and Organic Liquid Fertilizer in Ciplukan Plant Cultivation (Physalis angulata L.)

“…Organic fertilizers, such as chicken manure, have advantages in improving soil physical properties such as soil permeability, soil porosity, soil structure, and soil cations. In addition, manure also plays a role in increasing the absorption and holding capacity of the soil to water so that the availability of water needed by plants is fulfilled [20]. The nutrient content in chicken manure is 1.7% N, 1.90% P205, and 1.50% K 2 O. Another factor that affects plant growth is Organic Liquid Fertilizer (OLF).…”