土壤养分状况系统研究法在蕉园土壤上的应用研究

Application of ASI systematic approach on Panyu banana orchard soils

采用实验室分析、吸附试验和温网室盆栽试验相结合的诊断程序,以香蕉为指示作物,对广州市番禺区3种蕉园土壤的养分限制因子进行了系统诊断。结果表明:广州市番禺区3种蕉园土壤均缺N,减N处理产量分别比最佳处理(OPT)下降59.7%、46.7%和55.1%,减产极显著。番禺东涌蕉园与灵山蕉园土壤K、Mg含量偏低,B丰富;万顷沙蕉园土壤P、K含量较缺乏;3种土壤中的Ca与Fe含量充足,Mn含量较充足。

The limiting factors of soil nutrient in three different banana orchard farms,Dongchong,Lingshan and Wanqingsha,in Panyu District,Guangzhou City,were identified by systematic application of indicator plant（banana） and diagnostic soil analysis（soil adsorption trial and pot experiment）.Results show lack of soil N in all three banana orchards in the study area.Compared with OPT（Optimal Treatment）,yield of N treatment markedly decreases by 59.7%,46.7% and 55.1% in Dongchong,Lingshan and Wanqingsha respectively.Banana K and Mg content is low,while B is high in the Dongchong and Lingshan banana orchards.P and K are lacking in soils in Wanqingsha banana orchard.However,soil Mn content in the three banana orchard farms is sufficient.