广东郁南无核黄皮果园土壤养分肥力状况调查

对广东省郁南县无核黄皮主产区的36 个丘陵山地无核黄皮果园的土壤肥力状况进行了分析。结果表明：无核黄皮主产区丘陵果园土壤基础肥力较好，土壤有机质、有效氮磷钾等含量高，但土壤呈强酸性或酸性，氮磷钾含量丰富，然而比例不合理，土壤中有效钙尧镁、硼和钼处于缺乏状态，而铜、铁、锌和锰则含量丰富。建议在无核黄皮栽培管理中注重提高土壤pH 值，控制并平衡施用氮磷钾肥料，同时补充钙、镁、硼和钼肥，促进无核黄皮的可持续发展。

Investigation of soil fertility in orchards of seedless wampee(Clausena lansium) in Yu'nan Guandong

that: higher content in the organic matter available N, P and K were found in soils of main producing areas of seedless wampee, but the soil pH value was low and imbalance in N:P:K. And the available content of Ca, Mg, B and Mo were poor while the content of available Cu, Fe, Zn, Mn were rich. We suggested that soil should be improved in acidity and in balanced application of N, P,K fertilizer and with the supplement of Ca, Mg, B and Mo elements in seedless wampee cultivation and management to ensure sustainable production.