期刊论文

Peng, W.

中文

生态学报

1000-0933

2012

32

19

6259-6269

10.5846/stxb201107251094

中国科学院西部行动计划项目（KZCX2-XB3-10） 国家科技支撑计划（2010BAE00739） 中国科学院战略性先导科技专项（XDA05050205,XDA05070404） 国家自然科学基金项目（31000224,31070425,30970508,U1033004和31100329） 中国科学院“西部之光”人才培养计划

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基于动态监测样地(200 m×40 m)的网格(10 m×10 m)取样,以农作区为对照,用地统计学方法研究了喀斯特峰丛洼地人工林、次生林和原生林3类典型森林生态系统表层土壤(0—15 cm)有机质的空间变异,通过主成分分析和相关分析,探讨了其生态学过程和机制。结果表明:喀斯特峰丛洼地土壤有机质很高,沿着农作区-人工林-次生林-原生林的恢复梯度,土壤有机质显著提高,变异系数逐步增大;农作区和3类森林土壤表层有机质均具有良好的空间自相关性;农作区试验半变异函数C_0/(C_0+C)值为26.5%,呈中等程度的空间相关性;3类森林的C_0/(C_0+C)值为9.0%—22.6%,呈强烈的空间相关性;农作区和人工林土壤有机质呈单峰分布...

The spatial variability of surface soil (0-15 cm) organic matter in plantation, secondary forest, and primary forest in depressions between hills in a karst region was examined using farmland as a control. The ecological processes and mechanisms behind this variability were also discussed. Eighty sample plots of 10 m × 10 m were established in 200 m × 40 m farmland, plantation, secondary fores, and primary forest plots in depressions between karst hills. Geostatistics was used to analyze the spatial pattern of surface soil organic matter in t...