Evaluation of Greenhouse Gas Emission and Crop Growth in Chinese Cabbage Cultivation Using Biochar

Abstract

This study was conducted to evaluate the changes in greenhouse gases and crop growth according to application levels of rice hull biochar (BC) in upland (U) and greenhouse (G) fields. The field experiment was performed by applying a different input amount biochar (0, 1, 3 and 5 t ha-1) and all treatments were applied inorganic fertilizers by N-P2O5-K2O : 0.32-0.08-0.2 t ha-1. CO2 and N2O emissions in U and G fields were determined using closed chamber for crop cultivation period. The growth of Chinese cabbage by BC was positively affected, and the Fresh weight of Chinese cabbage in U and G Fields treated with BC increased up to 28.5% and 10.6% compared to UBC0t and GBC0t treatments. CO2 emissions in the BC treatment were increased. Compared with 0 t ha-1 CO2 cumulative emission was increased in the range of UBC treatments 1.36 - 2.26 times and GBC treatments 1.15 - 1.70 times. Compared with 0 t ha-1 N2O emission was decreased in the range of UBC treat- ments 47.6 - 81.3 and GBC treatments. 27.4 - 54.7%. These results indicate that the application of BC in Chinese cabbage cultivation can have the effect of increasing the growth of Chinese cabbage and reducing greenhouse gas emissions. Keywords: