建水蔗区土壤养分分布特征研究

Study on Distribution Characteristics of Soil Nutrients of Sugarcane Field in Jianshui County

通过对建水蔗区92份土样的分析研究表明，建水蔗区土壤大部分呈微酸性和酸性，有机质含量适中；氮、磷含量偏低，速效氪含量适中，有效磷含量极为缺乏，钾含量适中，有效钾含量较高；有效铜和有效锰含量丰富，有效锌极为缺乏。依据建水土壤基础养分，分析提出两类甘蔗专用复混肥配方模式，既基肥型N：P2O5：K2O=12：18：10，新植蔗底肥施用复混肥600kg／hm^2；追肥型N：P2O5：K2O=28：12：5，追肥施用750～1050kg／hm^2，其中高产田施下限，低产田施上限。

92 soil samples in Jianshui sugarcane field were analyzed. The results showed that the majority of soil in Jianshui sugar cane area assumed the slight acidity and the acidity, the organic content was moderate, nitrogen and phosphorus content were somewhat low, the available nitrogen content was moderate, the effective phosphorus content lacked extremely, the potassium content was moderate, the effective potassium content was high,the effective copper and the effective manganese content were rich, and the effective zinc was scarce. Based on the Jianshui soil foundation nutrient, two kind of sugar canes spocial-purpose mixed fertilizers formula were proposed, namely, base fertilizer N ： P2O5： K2O = 12： 18： 10, newly planted sugarcane was applied mixed fertilizer 600 kg/hm2 as base fertilizer, and topdressing N： P2O5： K2 O =28： 12： 5, the topdressing employed 750 - 1050 kg/hm2, in which high-yield field executes the lower limit, and the low-yielding land executes the upper limit.