海南甘蔗土壤养分状况研究

Soil Nutrient Status in Sugarcane Plantation in Hainan Province

通过对海南西部儋州、昌江、白沙,北部临高、澄迈和定安,主要甘蔗产区0～20cm土层共85个样品进行分析。结果表明,海南蔗区土壤pH值平均为4.50,88.23%的样品pH值<5.5;土壤有机质含量平均为15.3g/kg,38.82%的样品有机质含量小于10g/kg;62.35%的样品碱解氮含量低于60mg/kg;38.82%的样品有效磷含量小于10mg/kg;78.82%的样品速效钾含量小于50mg/kg;60.0%的样品交换性钙含量小于450mg/kg;80.0%的样品交换性镁含量小于120mg/kg;28.24%的样品有效硫含量小于12mg/kg;83.53%的样品有效硼含量低于临界值;蔗区土壤有效锌含量和有效铁含量较为丰富。

The results of soil nutrient status of 85 soil sample from Danzhou、 Changjiang、 Baisha、 Lingao、 Dingan and Chengmai counties in western and northern Hainan were that pH of 88.23% of soil was lower than 5.5 and the soils was acid,the organic matter content in 38.82% of soil samples were lower than 10 g/kg,available N content in 62.35% of soil samples were lower than 60 mg/kg,available P content in 38.82% of soil samples were lower than 10 mg/kg,available K content in 78.82% of soil samples were lower than 50 mg/kg,exchangeable Ca content in 60.0% of soil samples were lower than 〈450 mg/kg,exchangeable Mg content in 80.0% of soil samples were lower than 〈120 mg/kg,available S content in 28.24% of soil samples were lower than 12 mg/kg,available B content in 83.53% of soil samples were lower than 0.5 mg/kg.