Abstract:In order to understand the indicative function of ground vegetation to soil nutrient, the relation between ground vegetation and soil nutrient was studied in evergreen broad-leaved forest of Guangdong by using indicator species analysis (ISA). The results showed that the concentrations of available nitrogen (AN), available phosphorus (AP), available potassium (AK) and organic matter (OM) had significantly integrative effects on the distribution patterns of ground vegetation (P<0.05), with in the order of AP > OM > AK > AN. Indicator species were Ampelopsis cantoniensis and Tricyrtis macropoda for soil AN ≤ 270 mg/kg, Tricalysia dubia for 270-360 mg/kg of AN, and which was Alpinia chinensis for soil AP ≤ 2 mg/kg. The indicator species was Syzygium buxifolium for soil AK ≤ 100 mg/kg, Carex cruciata for 100~150 mg/kg of AK, and Pteris fauriei for AK> 150 mg/kg. Indocalamus tessellatus was the indicator species for soil OM>0.8%, Alpinia chinensis and Elaeagnus glabra for OM ≤ 0.6%, and Premna microphlla for OM at 0.6%-0.8%. Therefore, it was convenient for forest management and soil health evaluation to monitor soil condition of forest by using effective ground vegetation survey. The response of indicator species of ground vegetation to soil nutrients could not only provide theoretical support for the site conditions of the study area, but also provide theoretical basis for the artificial cultivation of the species, which was of great significance for the introduction and cultivation of the habitat reconstruction and biodiversity conservation.
