The application of various types of organic fertilizer and N, P, K combination on soil fertility, growth and yield of black rice

Abstract

Black Rice is a source of carbohydrates foodstuff that is a local natural wealth of Indonesia. Black Rice contains a lot of aleurone and endosperm which produce anthocyanin (functions as an antioxidant and antidote to free radicals) so that it has dark purple to black colour. Beside, this black rice also contains fewer sugar levels, more fibre and vitamin E. Other advantages of black rice. It can be used as natural medicine or natural functional food ingredients to treat the body from degenerative diseases such as cancer. Potential yield of black rice is around 4–5 t/ha. Fertilizer is one of the most important factors besides land, labour and capital. Balanced fertilisation has an important role to improve agricultural products. In this study, the extent of the role of various types of organic fertilizers (straw compost, cattle manure, chicken manure and sheep manure) and N, P, K fertilizers on soil quality, the growth and yield of black rice were investigated. The experimental design was carried out using a Randomized Block Design (RBD) consisting of 10 treatments with triplicates. The combination of treatment consisted of straw compost, cattle manure, chicken manure, sheep manure and 0-100% N, P, K. The results showed that the combination of various types of organic fertilizers and N, P, K fertilizers had an effect on plant height, number of tillers and black rice yield (dry grain weight). The application of chicken fertilizers which was added with N, P, K fertilizers for one recommendation gave grain weight of 55.40 g/tiller(7,09 ton/ha).