The Proportional Optimization of Kitchen Waste Composting in Saline-Alkaline Soil Improvement

Abstract

This study investigates the application value of kitchen waste composting technology in the amelioration of saline-alkali soil, highlighting that aerobic composting, due to its simplicity, low cost, and high agricultural value, is more suitable for kitchen waste treatment. Kitchen waste compost is rich in organic matter and mineral elements, which can significantly increase the organic carbon content in soil, reduce heavy metal content, and improve soil physical structure, thereby promoting plant growth. This study focuses on saline-alkali soils in Shandong and Jilin provinces, analyzing the effects of different compost ratios on soil physicochemical properties and plant growth through experiments. The results indicate that in Shandong saline-alkali soil, a mixture ratio of 80% soil and 20% compost is most suitable, maximizing seed germination rate. In Jilin saline-alkali soil, a mixture ratio of 70% soil and 30% compost is more effective. This suggests that an appropriate proportion of kitchen waste compost can significantly improve the soil environment of saline-alkali land and promote plant growth. This study provides an effective solution for urban kitchen waste treatment and saline-alkali soil amelioration.