通过调查取样分析 ,结果表明 :海南菠萝园土壤表层石漠化趋势明显 ;土壤中有机质、全氮、碱解氮和速效钾含量与自然植被区土壤比较 ,明显下降 ,但磷素及全钾量没有出现衰退趋势 The results of sampling and analysis showed that the surface rock desertification of Hainan pineapple was obvious. The contents of organic matter, total nitrogen, available nitrogen and available potassium in soil were significantly decreased compared with those in natural vegetation area, but the content of phosphorus and total potassium No recession trend