Changes in soil labile organic carbon pool after change consecutive preharvest burning to unburned sugarcane harvest condition in clay loam soil

Abstract

Particulate Matter 2.5 (PM2.5) is an effecting to the health of people and one of the air pollution sources. And effect to soil properties sugarcane pre-harvest burning not have residue back to soil surface affecting to decrease soil organic matter and microorganism activity. Currently sugarcane harvesting have a labor problem. Therefore, the farmers have to burn sugarcane before harvest to reduce labor requirement. The objectives of this study to investigate change of some soil biological and chemical properties at planted and ratoon cane harvest after change to unburn harvest with consecutive burn management. The experiment have 4 replications and comparison between treatments by T-test. At planted cane harvest, there are 2 treatments i.e. pre-harvest burning and unburn management. At ratoon cane harvest, there are 3 treatments i.e. (1) pre-harvest burning as a control treatment (2) unburned management and (3) burned management at planted cane harvest change to unburned management. Our result indicated that the treatments not effect to some soil biological and chemical properties at planted cane harvest. However, sugarcane pre-harvest burning at planted cane harvest change to unburned management and unburned management both planted and ratoon cane increase soil microbial biomass C 332.39 and 317.60 mg/kg respectively (P < 0.05), moreover, treatment 2 provided greater soil organic matter when compared to consecutive pre-harvest burning treatment. Thus, unburn cane harvest may not only environment friendly but also ameliorate soil labile C pool that support sustainability of sugarcane
cropping system