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- W2369619212 abstract "Through comparing the concentration and inventory of soil organic carbon(SOC) and soil enzyme activity under different plant ages(1,3,4,5 to 8 years) of alfalfa at the foot of Helan mountain in Ningxia,the SOC and soil enzyme activity vertical distribution characters were explored.1)With the increase of soil depth and plant time,from 0 to 100 cm soil mean SOC concentration were 4.519,4.865,5.120,5.348 and 3.334 g/kg from 1 to 8 years,the soil profile SOC concentration mainly showed a significant accumulation in the 0 to 40 cm depth,accounted for 69.7%,65.8%,73.8%,70.0% and 67.2% from 0 to 100 cm,but it sharply declined below 40 cm;2)0-100 cm soil mean SOC density were 1.148,1.217,1.231,1.398 and 0.840 kg/m2 from 1 to 8 years,and the surface soil(0-40 cm) accounted for about 54.8% to 61.8%,the highest SOC content and its density was five-year alfalfa,the order of the concentration and density of SOC in the 0-100 cm soil layer were 8 years(19.9 g/kg and 5.04 kg/m2)1 year(27.7 g/kg and 6.77 kg/m2)3 years(29.7 g/kg and 7.26 kg/m2)4 years(30.4 g/kg and 7.38 kg/m2)5 years(32.2 g/kg and 8.53 kg/m2).3) Three kinds of soil enzyme activity decreased with the increase of soil depth and plant time,the soil surface(0-10 cm) and subsurface(10-20 cm) enzyme activity decreased significantly,soil enzyme activity was mainly concentrated in the 0-20 cm depth,showed the surface gathering." @default.
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- W2369619212 date "2013-01-01" @default.
- W2369619212 modified "2023-09-24" @default.
- W2369619212 title "Vertical distribution characters of soil organic carbon and soil enzyme activity in alfalfa field with different growing years." @default.
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