海南山地橡胶园土壤养分流失特性研究

对海南山地橡胶园土壤养分淋失特征研究结果表明.山地橡胶园土壤养分含量为:有机质9.06～15.68 g/kg、全氮0.47～0.87 g/kg、全磷(P2O5)0.53～0.89 g/kg、速效磷(P2O5)1.40～7.33 mg/kg、全钾(K2O)5.07～21.77g/kg、速效钾(K2O)26.80～71.41 mg/kg,其中有机质、全氮、全钾和速效钾含量均低于天然热带雨林,全磷、速效磷含量略比天然雨林高.不同地形橡胶园土壤养分表现为:陡坡山地养分含量较低、淋失较强、富集较弱;谷地养分含量较高、淋失较弱、富集较强;中坡山地、中坡丘陵、碎原的养分含量介于陡坡山地和谷地之间,部分养分变化幅度也介于陡坡山地和谷地土壤间.

Study on properties of soil nutrient loss from mountanious region in rubber plantation in Hainan

A field study of soil nutrient loss was conducted in red soil on sloping surface.The results showed that soil nutrients were that OM changed from 9.06 to 15.68 g/kg,total N changed from 0.53 to 0.89 g/kg,total P changed from 0.53 to 0.89 g/kg,available P changed from 1.40 to 7.33 mg/kg,total K changed from 5.07 to 21.77 g/kg,available K changed from 26.80 to 71.41 mg/kg.The OM,TN,TK and available potassium are lower than the savageness tropical rain forest,but the TP and available P are appreciably high tha...