PurposeThe spatial distribution of soil nutrients in potato planting areas of Xundian Hui & Yi Nationality Autonomous County was studied to provide scientific basis for potato fertilization decision making.
MethodAccording to the data of soil nutrient collection points in Xundian County and the soil nutrients requirement of potato growth, with nitrogen, phosphorus and potassium as the research object, combined with the 1∶250 000 geographic information data of Yunnan Province, with the help of geographic information system (GIS) spatial analysis technology, using inverse distance weighting spatial interpolation method, spatial interpolation of data of the sample point; the soil nutrient division method of potato was adopted and the area calculation function of ArcMap software was used to form the distribution map of fertility grade.
ResultsThrough the analysis of the distribution map of potato fertility grade in Xundian County, the demand for potash fertilizer was high in the potato planting process in Xundian County, and the content of available potassium in 62% area was in the middle level. About 78% area of alkali-hydrolyzed nitrogen was abundant, and about 21% of the area was in the intermediate level. The area of available P abundance level accounted for about 33%, and the area of available P about 66% was in the middle level. Reasonable fertilization was recommended for specific villages and towns, and the special map of potato fertilization regionalization in Xundian County was made.
ConclusionsThe recommended model of nitrogen, phosphorus and potassium fertilization in this paper provides scientific basis for scientific fertilization of potato in the research area, and it has certain value for the green development of potato.
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