| Residue decomposition in soils under different vegetation types |
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| DOI：10.7606/j.issn.1000-7601.2008.04.17 |
| Key Words: Zi wuling plant residue residue decomposition |
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| Abstract: |
| Based on the secondary forest at Zi wuling in typical hilly-gully regions on the Loess Plateau the decay of plant residues in soils under different vegetation types is studied ．The results show that the decaying rate is ：Alf alf a ＞Corn ＞S ．sibiricus ＞Q ．liaot ungensis ＞H ．r ha mnoi des under different vegetation types． The decaying rate of plant residues adding N was higher than that without N．According to changes of decaying remainders the decaying process can be dividedinto 4stages ：the fast decomposition stage the stagnant decomposition stage the slow decomposition stage the stage of trending to be stable ．According to the model si mulation by Olson’s exponential function corn might take 43．73 months to reach its 95％ of decay （ T0．95） compared with 23．35months for Alf alf a 52．56months for S ．sibiricus 108．1months for Q ．liaot ungensis and 161．1 months for H ．r ha mnoi des ．And there is significant relationship bet ween the decaying rate of plant remainder and the decaying time． |