6种经营模式的木荷南方红豆杉次生林土壤理化性质

Soil physical and chemical properties of Schima superba and Taxus mairei secondary forest with six management patterns

以木荷和南方红豆杉次生林为例,实施6种经营模式,分经营模式实施技术措施,并对经营效果进行对比分析。结果表明：6种次生林经营模式林地土壤的容重、毛管孔隙度、最大持水量及田间持水量差异不显著,但非毛管孔隙度差异明显;6种经营模式林地的土壤有机质含量都偏高,有效P、全P和全N含量均较低,速效K含量在85.75～155.23 mg/kg之间变动;相同经营模式林地不同土壤层次的化学性质差异大,随着土壤层次的加深,pH值随之增加,其它化学指标值呈随土层加深而下降的规律。

By Taking Schima superba and Taxus mairei secondary forest for the example, six management patterns were designed, the different technical measures corresponding to the six patterns were implementated and the management effects were studied. The results show that the soil density, capillary porosity, maximum water-holding capacity and field capacity had no obviously differences among the six management patterns, while the non-capillary porosity had significantly differences among the six management patterns; The contents of organic matters in the soil were relatively high, but that of the available P, total P and total N were relatively low; The available K contents were changed between 85.75 and 155.23 mg/kg; the chemical properties in the same management pattern of different soil layers changed greatly. The pH valves of the soil increased with the soil depth, but the values of other indexes decreased with the soil depth.