Optimization of Organic Mulches Thickness Improves Soil Moisture Retention under Controlled Conditions

Organic mulch can improve the moisture, chemical composition, dust, and dust suppression of soil, beautify environment. In view rapid evaporation rate serious loss soil water in tropical areas, this paper explored effect organic materials with different thickness on increase retention improvement caused by evaporation. Rubberwood sawdust (RWS), rubberwood bark (RWB), coconut fiber (CF), Mulch (MC) were selected as mulching materials. Field experiment laboratory performed, soil-moisture content temperature continuously monitored. However, from daily measurement at constant conditions (29°C ± 0.2°C, 74% 1% air RH) experiment, results variance analysis (ANOVA) showed that there was no significant difference between soil-water covered samples bare (P > 0.05). field experiments, indicated differences owing to covering material