Effect of a long-term organic manure application on the different available carbons in red soils
长期施肥对红壤不同形态碳的影响

The effect of a long-term organic manure application on different available carbons in red soils are discussed.The results indicate that comparing the organic manure treatment with CK,different available carbons have different(improvements) on red soil.Effects of different treatments on the C_(MB) and C_T,C_M are green manure>farmyard manure>rice straw>straw returned to farm>CK and farmyard manure>green manure>rice straw>straw returned to farm>CK respectively.Effects of different treatments on the C_A,A_(AC),A_(BC),A_(CC) and CPMI are green manure>rice straw>(farmyard) manure>straw returned to farm>CK.Green manure and rice straw have a better improvement on soil physical and chemical feature and fertility.CPMI is well related to soil nutrient(factors) and is sensitive to agricultural measures,(which) indicates that it is(practical) to assess soil C pools under different management practices using CPMI.