With the continuous enhancement of environmental awareness, biodegradable vest bags have gradually become a substitute for traditional plastic bags. Understanding its composting conditions and the fertility assessment of degradation products is of great significance for achieving resource recycling and sustainable development.
First, composting conditions play a key role in the degradation of biodegradable vest bags. The suitable temperature range is usually between 50℃ and 60℃. In this temperature range, microbial activity is high, which can accelerate the decomposition of vest bags. Humidity is also crucial, generally maintained at a relative humidity of 40% to 60%, providing the necessary moisture environment for microbial growth. Adequate oxygen supply is the guarantee for the smooth progress of the composting process, and the compost pile needs to be turned regularly to ensure that the oxygen can be evenly distributed. For example, in professional composting facilities, these conditions can be accurately controlled through automated ventilation systems and temperature and humidity monitoring equipment, so that the biodegradable vest bag can complete initial degradation within a few months.
Secondly, about the fertility assessment of degradation products. The biodegradable vest bag will gradually decompose into organic matter during the composting process. Among them, nitrogen compounds, phosphorus and potassium are important indicators of fertility. After analysis and testing, the nitrogen content in the degradation products can supplement the nitrogen nutrition in the soil to a certain extent and promote the growth of plant stems and leaves; phosphorus helps the development of plant roots and flowering and fruiting; potassium can enhance the stress resistance of plants. For example, when compost containing biodegradable vest bag degradation products is applied to vegetable planting, compared with the unapplied area, the vegetable plants grow stronger, the leaves are greener, and the yield is also increased, which shows that its degradation products have certain fertility value.
Furthermore, different types of biodegradable vest bag raw materials will affect the fertility of degradation products. Taking starch-based and polylactic acid-based vest bags as examples, starch-based vest bags may produce more simple organic substances such as sugars after degradation, which can be quickly used by microorganisms and converted into fertility; while polylactic acid-based vest bags degrade relatively slowly, but the degradation products may contain more organic acids and other components, which have a certain regulating effect on soil pH, affecting soil fertility and plant growth environment from different aspects.
Finally, in practical applications, the optimization of composting conditions and the rational use of the fertility of degradation products should be comprehensively considered. On the one hand, further research should be conducted on how to accurately control composting conditions and improve degradation efficiency; on the other hand, degradation products should be combined with other organic fertilizers or soil conditioners through scientific proportions to enable them to play a greater role in agriculture, horticulture and other fields, promote the effective transformation of biodegradable vest bags from waste to resources, and contribute to environmental protection and the development of ecological agriculture.
