Study Of Relationship Between Ecological Restoration And Soil Organic Carbon In Liusha River

According to the data of field investigation and indoor analyses,using typical statistical analysis methods, the change of soil soil total organic carbon(TOC), readily oxidizable organic carbon(ROC), soil water-soluble organic carbon (WSOC), soil humus carbon (HC), soil humus acid carbon(HAC) and HAC/FAC under three different ecological restoration degrees in cultivated land,forest land and garden landorganic carbon were studied of 71 soil simples in Liusha River, Sichuan Province, China.The results are. illustrated as follows:(1) The following results are about the soil organic carbon contents in intensive degree,moderate degree and light degree and cultivated land,forest land and garden land. The mean contents of soil organic carbon increased with ecological restoration degrees.and the mean contents of soil total organic carbon were 31.99±4.82 g kg-1,20.54±6.25 g kg-1,8.38±3.11 g kg-1 and 1.63±0.48 g kg-1 (F=93.669**,P=0.000); the mean contents of soil readily oxidizable organic carbon were 14.34±4.05 g kg-1,8.46±3.34 g kg-1,4.15±1.74 g kg-1 and 1.09±0.51 g kg-1 (F=44.787**,P=0.000);the mean contents of soil humus carbon were 7.34±2.43 g kg-1,4.70±1.98 g kg-1,2.10±1.11 g kg-1 and 0.42±0.34 g kg-1 (F=34.332**,P=0.000); the mean contents of soil humus acid carbon were 3.16±1.28 g kg-1,1.69±0.80 g kg-1,0.69±0.45 g kg-1 and 0.08±0.04 g kg-1 (F=34.331**,P=0.000); the mean contents of soil water-soluble organic carbon were 279.4±71.8 mg kg-1,191.9.4±52.7 mg kg-1,87.3±35.8 mg kg-1 and 18.3±6.4 mg kg-1 (F=59.071**,P=0.000)The mean contents of soil organic carbon in forest land, cultivated land and garden land were different too. the mean contents of soil total organic carbon were 21.88±9.73 g kg-1,19.21±11.29 g kg-1,13.32±7.67 g kg-1 and 1.63±0.48 g kg-1 (F=6.633**,P=0.001) the mean contents of soil readily oxidizable organic carbon were 10.44±5.18 g kg-1,9.02±4.57 g kg-1,5.16±3.03 g kg-1 and 1.09±0.51 g kg-1 (F=9.400**,P=0.000);the mean contents of soil humus carbon were5.17±2.98 g kg-1,4.40±2.77 g kg-1,3.14±1.87 g kg-1 and 0.42±0.34 g kg-1 (F=5.141**, P=0.003); the mean contents of soil humus acid carbon were 1.94±1.13 g kg-1,1.76±1.40 g kg-1,1.12±0.95 g kg-1 and 0.08±0.04 g kg-1 (F=4.105**,P=0.010); the mean contents of soil water-soluble organic carbon were 199.3±85.8 mg kg-1,182.6±94.9 mg kg-1,124.0±72.4 mg kg-1 and 18.3±6.4 mg kg-1 (F=7.229**, P=0.000)(2) The correlation between soil organic carbon were studied, and the result decleared that the correlation between soil total organic carbon and readily oxidizable organic carbon were significantly r=0.913** (n=71, r0.01=0.325), and the correlation between soil total organic carbon and soil water-soluble organic carbon were significantly too r=0.871**, and the correlation between soil total organic carbon and soil humus carbon r=0.830**, soil humus acid carbon r=0.846** were significantly too.The result about correlation between soil organic carbon in three ecological restoration degrees and three land use decleared that, the correlation between soil organic carbon and the other soil organic carbon were not significantly in intensive degree; the correlation between soil total organic carbon and the other soil organic carbon were significantly in moderate degree, light degree,forest land, cultivated land and garden land.(3) The main influential factors of ecological restoration in Liusha Basin were altitude, soil types,parent material and biomass.The content of soil total organic carbon, readily oxidizable organic carbon,soil humus carbon, soil humus acid carbon,soil water-soluble organic carbon were bigest at 1500-1800m; The content of soil organic carbon of yellow brown soil and rice soil were very significantly higher than yellow soil and purple soil,but the different in contents of soil readily oxidizable organic carbon were not significantly (F=2.097, P=0.109); The relationship of the soil organic carbon with parent materials was very complex, but the contents were the lowest in the soil from the mudstone and limestone.the correlation between soil total organic carbon and biomass were significantly, the different of the biomass were significantly (F=84.365**,P =0.000).