Investigation of soil nutrient status in sugarcane-growing area of south Guangxi
[Objective]Soil nutrient status in sugarcane-growing area of south Guangxi was investigated to provide references for appropriate soil utilization and scientific fertilization.[Method]Applying GIS,498 soil samples were collected from typical sugarcane-growing area of south Guangxi.The nutrient status of these samples was measured.[Result]Acidified soil (pH＜6.5),as the typical and major type,occupied 95.5％ of the entire sugarcane-growing area of south Guangxi.SOM content of soil samples in the study area ranged from 6.03 g/kg to 44.56 g/kg.Available N content was 14.0-175.0 mg/kg.Available P content was 1.7-95.0 mg/kg.Available K content was 11.0-358.0 mg/kg.Most of soil nutrients was in medium level,not good enough for high sugarcane yield.Regarding all kinds of microelements,available B content of soil reached 0.24 mg/kg,which was insufficient in 98％ soil.The average available Ca,Mg,Zn and Cu contents were recorded as 592.68,62.34,0.93 and 0.65 mg/kg,which was insufficient in 54.84％,69.08％,19.08％ and 7.02％ soil,respectively.[Conclusion]In sugarcane-growing area of south Guangxi,containing low organic matter,soil fertility is low.Available N,P and K content are low or moderate,while Fe and Mn content are a lot.Available Cu and Zn content are in medium level.Accordingly,more organic fertilizer,N,P and K fertilizer should be applied in production.
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万方数据
维普
