中文摘要：

对儋州市东成镇的7个不同类型的桉树(Eucalyptussp.)人工林和一个马占相思林(Acaciamangium)林下的土壤含水量、土壤温度、土壤容重、土壤坚实度(硬度)以及土壤的机械组成等5个土壤物理指标进行研究。结果表明,有林下植被的桉树人工林地的土壤含水量比无林下植被的桉树人工林地的高出11.2~62.9 g.kg-1;同一样地内,有枯枝落叶覆盖物的土壤含水量平均比没有枯枝落叶覆盖物的土壤含水量高27.6~38.2 g.kg-1;有林下植被的桉树人工林地土壤温度比无林下植被的桉树人工林地和空旷弃荒地低,但却比无林下植被、树冠大、荫蔽度大的马占相思林地的高。有林下植被的桉树人工林地的土壤硬度要比无林下植被的桉树人工林地、马占相思林地和空旷弃荒地的小5.49~18.76 kg.cm-3。林下植被覆盖率高的桉树人工林地,其容重比有林下植被的桉树人工林地、无林下植被的桉树人工林地、马占相思林地、牧草实验地样地小0.33~0.48 g.cm-3。这说明桉树人工林下植被和枯枝落叶是影响土壤含水量、土壤硬度、土壤温度、土壤容重等土壤物理性质的重要因子。因此,为了有效改善桉树林的立地条件以及能更好地经营桉树人工林,在...

英文摘要：

The study on the soil water content,temperature,bulk density,hardness,and mechanical components under 7 artificial Eucalyptus forests and 1 Acacia forest in Dongcheng Town of Danzhou City showed that soil water content in the Eucalyptus forest with 50% coverage of understory vegetation was 11.2～62.9 g·kg~(-3) higher than that without understory vegetation,and 27.6～38.2 g·kg~(-3) higher in the forest with litter coverage than without it.Soil temperature under the Acacia forest with understory vegetation was ...