Abstract:

Re-vegetation is a major way in restoration of eroded land and in promotion of soil quality. Different vegetation types have different effects on eroded soil restoration. It is very important to evaluate their effects for rapid regeneration of eroded lands. Field plots had been established to restore the severely eroded red soil with different vegetation types at Red Soil Ecological Experimental Station of CAS, Yingtan, Jiangxi Province in 1989. Three typical forest restoration types were selected, i.e, Pinus massoniana, Cinnamomum camphora and Lespedeza bicolor, to detect the nutrients content and enzyme activities in different soil layers. The objective was to appraise their effectiveness in eroded red soil restoration. The results showed that re-vegetation markedly increased soil nutrient contents and enzyme activities for all the three vegetation types. The nutrient content in soil of Lespedez a bicolor field was significantly higher than those of Pinus massoniana and Cinnamomum camphora fields. IFI values of soils of Pinus massoniana and Lespedeza bicolor fields were significantly higher than that of Cinnamomum camphora field. It was also shown that both top-layer and sub-layer of soil profile was the thickest in Lespedeza bicolor field. So it was concluded that Lespedeza bicolor is most effective in restoration of severely eroded red soil among the three vegetation types.

Key words: eroded red soil, soil fertility, soil enzyme, man-made vegetation

摘要：

人工重建植被是土壤侵蚀区植被恢复、提高土壤质量的主要途径之一。选择适宜的人工植被对快速恢复侵蚀土壤质量具有重要参考意义。主要研究了侵蚀红壤人工栽植马尾松林、胡枝子林和樟树林近20年后不同土层养分含量和土壤酶活性，综合评价了这3种不同植被类型对侵蚀红壤肥力重建的效果。结果表明，3种植被恢复的侵蚀红壤养分含量都显著增加，胡枝子林土壤养分含量显著高于马尾松和樟树林土壤；从以养分含量和土壤酶权重计算的土壤肥力综合指标值（IFI）来看，胡枝子和马尾松林土壤IFI值都显著高于樟树林地；在土壤剖面构造上，胡枝子林地表层和亚表层厚度显著大于马尾松和樟树林地。综合来看，对侵蚀红壤肥力重建效果最好的为胡枝子，其次为马尾松，再次为樟树。

关键词: 侵蚀红壤 土壤肥力 土壤酶 人工植被