Effect of Cow Manure on Soil Organic Carbon, Total Nitrogent, and Growth of Choy Sum in Gold Mine Tailings

Mining activities in Bogor, Indonesia produce tailings contaminated with heavy metal Hg that can cause damage to physical, chemical, and soil properties. This research was carried out from October 2022 to February 2023 at greenhouse experiment was conducted in Jatinangor Campus, Faculty of Agriculture, Universitas Padjadjaran, West Java, Indonesia. The use of cow manure (CM) can improve substrate characteristics from tailings. The research was conducted to determine the effect of cow manure on plant height, number of leaves, fresh and dry shoot weight, organic-carbon, and total soil nitrogent. Greenhouse research was set up in Factorial Randomized Block Design. Choy sum plant variety is Shinta were planted 35 days with five treatments and five replications of CM. The used 450 g CM mixed with 550 g tailing gave the highest plant height, number of leaves, fresh and dry shoot weight of plant; organic-carbon, and total nitrogent in substrate. The experiment suggested that tailing mixed with CM is prominent to improve substrate characteristics and growth of choy sum.