Study on evaluating the effectiveness of compost fertilizer from jackfruit peel and fiber with various local agricultural materials on Green Mustard ( Brassica juncea )

In recent years, jackfruit production in Vietnam has been growing very strongly in both quantity and quality. However, most of the jackfruit is harvested and processed for meat, the rest is the jackfruit peels, and fibers are discarded, which will affect environmental sanitation. The study aims to enhance the value of jackfruit by taking advantage of nutrient ingredients in the peel and fiber of jackfruit to blend into organic fertilizer. Initial results show that the compost substrate samples mixed with rice husk ash and coir and the organic substrate sample mixed with coconut fiber had the best quality. Tested nutritional ingredients include including humidity is 76.1%, total organic carbon content is 27.3%, fulvic acid is 0.9%, humid acid is 0.9%, total nitrogen is 0.85%, total phosphorus is 0.57% after 35 days of incubation. Their quality meets the national standards of QCVN 01-189: 2019/BNNPTNT on fertilizer quality. After testing all three samples of organic substrates on the green mustard with germination rate (%), a number of branches, and total fresh weight (g), the results showed that test plants are grown with the compost from the shell - jackfruit fiber mixed with coconut fiber developed better than the control sample.