Treatment combination of corn cob biochar and bio land organic fertilizer as soil amendment in kale plant (brassica oleraceae var. acephala L.)

Abstract

Kale is rich in vitamins and easy to cultivate, yet land degradation often occurs. The combination of corn cob biochar and Bio land organic liquid fertilizer as soil amendment materials can reduce land degradation. This study aims to determine a proper dose combination of corn cob biochar and Bio Land on growing and yielding Kale. Results showed that the treatment using the combination of corn cob biochar and Bio Land affected the number of leaves, fresh weight, and plant height. Corn cob biochar dose of 6 t/ha and Bio Land of 15 l/ha were shown significantly improved the number of kale leaves, which were 25.50 strands at 5 mst, chlorophyll of 51.42 spad units, leaf area of 1164.5 cm3, root volume of 10.40 cm3. Kale leaves also reached fresh weight of 200.46 g, and dry weight of 26.81 g. Both soil’s physical and chemical properties were increased in the number of organic C, pH, nitrogen elements, and cation exchange capacity (CEC). The combination of corn cob biochar and Bio Land enhanced the growing and yielding of kale, in which the readily-available corn cob’s and Bio Land’s nutrients accelerated absorption. Higher dose of combination between corn cob biochar and Bio Land resulted in higher kale yield.