Enhancing the quality of Bueng Boraphet sediment with aquatic weeds compost for agriculture utilization according to the Bio-Circular-Green Economy (BCG Model) of Nakhonsawan province

Abstract

            Bueng Boraphet is the largest freshwater swamp in Thailand. The major problems are the accumulation of aquatic weeds and sediment, which requires regular dredging to prevent shallowing. Most of the sediment is used to fill construction areas. Therefore, to increase the value of aquatic weeds and soil sediments and also in agriculture uses.  This research was mixed with aquatic weed compost and soil sediment in various ratios, a total of 8 treatments (T1-8). Studied physical and chemical soil properties with growing kale to compare growth in each treatment. The correlation was analyzed between growth components and physical and chemical soil properties. This study was a sensory analysis of kale after harvesting.

            The results of this study show that all mixed soils were organic matter (OM), available phosphorus (Avail. P), exchangeable K (Exch. K), electrical conductivity (EC) and catch Ion exchange capacity (CEC) higher than non-mixed soil. The highest fresh weight of kale were found in T2, T7 and T8 via 100% of aquatic weed compost, aquatic weed compost: soil sediment 50 : 50 and 60 : 40, respectively. The correlation analyzed revealed a positive relation between EC, OM, Avail. P and CEC with plant height, number of leaf, leaf width, leaf length and fresh weight. The results of sensory tests from 40 volunteers were presented that kale in T2 had the best overall taste, color, taste and texture followed by T7 and T8, respectively. In conclusion, the aquatic weed compost can improve the soil sediment for planting in the future.