河北省太行山片麻岩退化山场生态恢复研究

Study on the Ecological Restoring of Gneiss Devolution Mountain of Taihang in Hebei

以生物量为指标,对河北省太行山片麻岩退化山场进行了生态恢复试验。结果表明,目前试验区植被生物量(3.5 t/hm2)较该区域自然植被净第一性生产力6.75 t/(hm2.a)相差甚远,增长潜力巨大。经过治理,土层厚度增加,土壤颗粒组成由粗变细趋势明显,土壤有机质、氮磷钾总养分逐年增加,治理4 a和治理7 a的生物量分别为9.5 t/hm2和21.9 t/hm2,生态恢复向良性方向发展,说明通过采取工程措施和生物措施,河北省太行山片麻岩退化山场可以达到生态恢复的目的。

With the biomass as the index, the ecological restoring of gneiss devolution mountain of Taihang in Hebei was studied. The results showed that vegetation biomass （3.5 t/hm^2） is lower than NPP of natural vegetation [ 6. 75 t/ （hm^2 ·a）] in test area and the potential of ecological restoring is tremendous at present. The thickness of soil increases, the tendency of soil particle from coarse to thinning is obvious, and the content of organic matter, NaOH- hydrolyzable N, available phosphorus and available potassium total content increases. The biomasses are 9.5 t/hm^2 and 21.9 t/hm^2 with the treatment 4 years and 7 years later, respectively. The ecology restoring develops step by step. The research indicated that gneiss devolution mountain of Taihang in Hebei could obtain ecology restores by biological control measures and engineering control measures.