The Influence of Earthworm and Rice Stubble on Soil Aggregate, Carbon Sequestration and Soil Fertility in Sandy Loam Paddy Soil in Northeast Thailand
2013 年 4 巻 1 号 p. 1-6
詳細
2013 年 4 巻 1 号 p. 1-6
The objective of this study was to investigate the effect of epigeic earthworm (Eudrillus eugeniae) and rice stubble on soil aggregate, SOC, soil fertility and greenhouse gases (CO2) emission in sandy loam paddy soils in Northeast Thailand. Experimental design was a completely randomized design. There were four treatments of incubation using Thai soil (Roi-et series) Sandy loam were: (I) soil control (no additions), (II) soil + rice stubble, (III) soil + earthworms (these added after 8 days incubation) and (IV) soil + rice stubble + earthworms (these added after 8 days’ incubation), and then incubated for 20 days. During the experiment, soil respiration (CO2), the aggregate size, SOC and soil fertility (N, P and K) were measured. The results suggest that the treatment with adding earthworms and rice stubble had significantly changed on soil aggregate than those without earthworm and added rice stubble only. Earthworm increased SOC and soil fertility (N, P and K) in paddy soil (sandy loam) than other treatment. The effect of earthworm on the decomposition of rice stubble in paddy sandy loam may influence the CO2 emission from paddy soil.
