Relationships Among Raw Materials,
Grinding Ratios, and Moisture Content During
the Composting Process

Wang, Lili; Huang, Quan; Wang, Shunli; Li, Guoxue; Yang, Xingyuan

doi:10.15244/pjoes/81294

Cited by 3 publications

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A previous study showed that labile straw (lower C/N) has a stronger impact on soil aggregate stability than recalcitrant straw (higher C/N) (Zhao et al, 2018). Our meta-analysis consistently supported this finding, showing that the C/N ratios of straw from the three major grain crops of corn, rice, and wheat were in the following order: corn < rice < wheat (Wang et al, 2018), while the positive influences of straw return on soil macro-aggregates and stability were in the following order: corn > rice > wheat. Moreover, in the pot experiment, we found that the degree of soil aggregation in the soybean straw treatment with a low C/N ratio (48.21) was greater than that in the corn straw treatment with a high C/N ratio (78.55).…”

Section: Effects Of Straw Type On Soil Aggregatessupporting

confidence: 86%

Responses of soil aggregation and aggregate‐associated nitrogen to straw return in China: Evidence from a meta‐analysis and a pot experiment

Geng,

Li,

Miao

et al. 2024

Land Degrad Dev

View full text Add to dashboard Cite

Enhancing soil structure and soil nitrogen availability is the key to sustainable agricultural development in global cropping systems. Straw return can affect soil aggregation, but the results of recent studies on the influence of straw return on soil aggregation are not consistent, and the distribution and availability of straw‐derived nitrogen in soils are still unclear. Here, a meta‐analysis of the effects of straw return on soil aggregation was conducted based on 57 studies published in China over the past 10 years. Moreover, combined with a pot experiment, the distribution and transfer characteristics of the two main wheat (Triticum aestivum L.)‐preceding crops, corn (Zea mays L.) and soybean (Glycine max L.) straw‐derived nitrogen in the soils were studied by using the 15N‐tracer method in the main wheat‐producing areas of China. 15N‐labeled straw was introduced into soils in pots at rates of 0.3% and 0.5% of the soil dry mass and incubated 60%–70% of the field water capacity throughout the entire growth period of wheat (220 days). A meta‐analysis revealed that straw return significantly improved the mass ratio of large macro‐aggregates (LM%) and small macro‐aggregates (SM%) but significantly decreased the mass ratio of micro‐aggregates (MI%) and silt plus clay‐size particles (CS%), with mean effect sizes of 36.27%, 9.06%, −8.26%, and −21.32%, respectively. The mean weight diameter (MWD) and geometric mean diameter (GMD) also increased by 21.48% and 15.64%, respectively. Compared with SM%, LM% made a greater contribution to the stability of soil aggregates. Moreover, only LM% showed a significant positive correlation with the corresponding aggregate‐associated nitrogen content, which was an important reason for the improvement in soil nitrogen availability after straw return. The positive effect of straw return on soil aggregation was greatest when the soil pH was close to 6.5–7.5, the average annual temperature was greater than 15°C, and the average annual rainfall was close to 800–1000 mm. The results of the pot experiment revealed that the proportions of straw‐derived nitrogen in >2 mm aggregates were 1.21–1.28, 1.50–2.23, and 1.34–1.74 times greater than those in 0.25–2, 0.053–0.25, and <0.053 mm aggregates, respectively. Moreover, the proportion of straw‐derived nitrogen content of aggregates of different particle sizes showed that the proportion of straw used to reach 0.5% of the soil dry weight was greater than 0.3%, which was 1.09–1.66 times greater, and that of soybean straw was significantly greater than that of corn straw, which was 1.50–2.28 times greater. At application rates of 60 g pot−1 and 100 g pot−1 straw, the absorption of soybean straw‐derived nitrogen by wheat was 1.83 and 2.15 times greater than that of corn straw‐derived nitrogen, respectively. In conclusion, straw return effectively improved soil aggregate stability and nitrogen availability, which was closely related to the increase in soil LM%. Soybean straw can stabilize soil aggregates better than corn straw, and its straw‐derived nitrogen is an important nitrogen source for subsequent wheat crops.

show abstract

Section: Effects Of Straw Type On Soil Aggregatessupporting

confidence: 86%

Responses of soil aggregation and aggregate‐associated nitrogen to straw return in China: Evidence from a meta‐analysis and a pot experiment

Geng,

Li,

Miao

et al. 2024

Land Degrad Dev

View full text Add to dashboard Cite

show abstract

“…5 a). Also, these bacteria at phylum level were observed in other waste composting (Wang et al 2017 ). The relative abundances of Proteobacteria, Bacteroidetes and Actinobacteria showed an increasing trend with the progress of the composting.…”

Section: Resultsmentioning

confidence: 70%

Humic acid biosynthesis and bacterial community evolution during aerobic composting of rice straw

Gao,

Liu,

Wang

et al. 2024

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

In this study, the effects of inoculum ratio, substrate particle size and aeration rate on humic acid (HA) biosynthesis during aerobic composting of rice straw were investigated, respectively. The contents of total organic carbon, total nitrogen and HA, as well as lignocellulose degradation in the composting were evaluated, respectively. It is found that the maximal HA yield of 356.9 g kg−1 was obtained at an inoculum ratio of 20%, a substrate particle size of 0.83 mm and an aeration rate of 0.3 L·kg−1 DM min−1 in the process of composting. The changes of microbial communities and metabolic functions at different stages of the composting were also analyzed through high-throughput sequencing. The result demonstrates that Proteobacteria, Firmicutes, Bacteroidetes and Actinobacteria were the dominant phyla and their relative abundance significantly varied over time (p < 0.05), and Rhizobium, Phenylobacterium, Pseudoxanthomonas and Paenibacillus were positively related to HA content in the compost. Furthermore, the metabolic function profiles of bacterial community indicate that these functional genes in carbohydrate metabolism and amino acid metabolism were involved in lignocellulose biodegradation and HA biosynthesis. This work may be conducive to explore new regulation strategy to improve bioconversion efficiency of agricultural residues to applicable biofertilizers. Key points • Temperature, pH, TOC, TN and C/N caused a great influence on humic acids synthesis • The succession of the microbial community during the composting were evaluated • The metabolisms of carbohydrate and amino acids were involved in HA synthesis Graphical abstract

show abstract

Enhancing the fermentation of acidified food waste using a self-formulated thermophilic and acid-resistant bacterial agent

Liu

Huang

et al. 2022

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

Relationships Among Raw Materials, Grinding Ratios, and Moisture Content During the Composting Process

Cited by 3 publications

References 24 publications

Responses of soil aggregation and aggregate‐associated nitrogen to straw return in China: Evidence from a meta‐analysis and a pot experiment

Responses of soil aggregation and aggregate‐associated nitrogen to straw return in China: Evidence from a meta‐analysis and a pot experiment

Humic acid biosynthesis and bacterial community evolution during aerobic composting of rice straw

Enhancing the fermentation of acidified food waste using a self-formulated thermophilic and acid-resistant bacterial agent

Contact Info

Product

Resources

About