应用土壤养分状况系统研究法指导香草兰施肥的试验研究

Application of ASI on Fertilization Technology in Vanilla

以香草兰(Vanilla planifolia Andrews)作为指示作物,应用土壤养分系统研究法(ASI法)对海南省万宁市中国热带农业科学院香料饮料研究所槟榔-香草兰间作园土壤养分进行分析、评价,结果表明:土壤中N、K、Ca和Mg极度亏缺,亏缺顺序为Ca>N>K>Mg;针对香草兰营养特性和种植园土壤养分状况,建议应多施用碱性和中性肥料,如钙镁磷肥、尿素、氯化钾等,以补充N、P、K、Ca、Mg等元素的亏缺。ASI法应用于指导香草兰施肥,对S和P的临界值需根据香草兰的营养特性进行相应的矫正,以提高适用性。

The soil nutrients of the betel nut intercropping vanilla plantation in Institute of Spice and Beverage Research, CATAS were evaluated by the soil nutrient systematic approach （ASI） with the vanilla as an indicating crop. The results indicated that the nutrients of N, K, Ca and Mg in the plantation were in a very low level, and in the order of Ca 〉 N 〉 K 〉 Mg. The alkaline and neutral fertilizers such as calcium magnesium phosphate, urea, potassium chloride should be used in the plantation so that the nutrients of N, P, K, Ca, Mg and other elements could be supplemented according to vanilla nutritional characteristics. The ASI is appli- cable in the research of vanilla, but the S and P threshold values should be corrected according to vanilla nutritional character- istics so as to improve its suitability.