| 陈小燕,吕家珑,张红,赵世伟,李顺存.不同植被覆盖下植物残体分解特性[J].干旱地区农业研究,2008,(4):83~87 |
| 不同植被覆盖下植物残体分解特性 |
| Residue decomposition in soils under different vegetation types |
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| DOI：10.7606/j.issn.1000-7601.2008.04.17 |
| 中文关键词: 子午岭地区 植物残体 分解特性 |
| 英文关键词:Zi wuling plant residue residue decomposition |
| 基金项目:黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目(10501-138)； 国家基础研究发展规划项目(2005CB121102)； 西北农林科技大学创新团队计划资助项目 |
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| 中文摘要: |
| 以黄土丘陵沟壑区子午岭次生林区为研究区域,研究了不同植被覆盖下植物残体的分解特性。结果表明:不同植被类型覆盖下,植物残体腐解速率为苜蓿>玉米>大油芒>辽东栎>沙棘,添加氮素比不加氮素的植物残体腐解速度快。根据腐解残留量的变化可将腐解过程分为4个阶段:快速分解阶段(01个月)、分解停滞阶段(27个月)、缓慢分解阶段(812个月)和趋于稳定阶段(1315个月)。根据Olson指数衰减模型对植物残体腐解速率和腐解时间进行拟合,发现玉米、苜蓿、大油芒、辽东栎、沙棘分解95%所需的时间(T0.95)分别为43.73、23.35、52.56、108.1和161.1个月,且检验结果均达到显著相关水平。 |
| 英文摘要: |
| 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． |
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