广西部分杧果园土壤营养状况及田间施肥试验

在对广西田阳、田东、钦州和防城果主要产区的代表性果园（１６个）进行土壤农化性状调查的基础上，进行Ｎ、Ｐ、Ｋ、Ｍｇ田间施肥试验，试验小区５个，随机区组排列，每小区５株，重复４次。土壤调查表明，供试果园土壤有机质含量（ｇ／ｋｇ）１１．４４～１２．０９，全Ｎ量（ｇ／ｋｇ）０．５３～０．９２，全Ｐ量（ｇ／ｋｇ）０．２０～０．３８，全Ｋ量（ｇ／ｋｇ）５．１４～１８．４３。速效Ｐ（ｍｇ／ｋｇ）０．８～２６．２，速效Ｋ（ｍｇ／ｋｇ）３３．９～５３．３。田间试验结果表明，施Ｎ、Ｋ配镁肥，能改善果植株的营养状况。施钾配镁肥，落果率可减少２０．８７％。在试验施肥条件下，单株产量提高０．８５千克／株。增施Ｎ、Ｋ配施Ｍｇ肥，单果重达３２３ｇ，此外施Ｋ，可提高果实粗蛋白和ＶＣ含量，可食部分略有增加。Ｎ２ＰＫ２Ｍｇ处理的果在室内气温２６．５℃～３２．５℃，６４％～８９％的相对湿度下，可贮藏２３ｄ。

Soil Nutrient Condition and Fertilizer Trial in Some Mango Orchards of Guangxi

Field experiment was carried out for the fertilization techniques of mango based on the investigation of soil nutrient conditions of mango orchard.The poor soil nutrient condition was one of the main reasons for being low yield of mango in Guangxi. Increased application of N.P.K and Mg could promrote the growth of mango trees,raise mango yield,improve its quality and lengthen its preservation time. Application of K and Mg reduced the fruit dropping of mango by 21%. The crude protein and V_C content and edible proportion of fruits were lightly increased by applying potash fertilizer.