基于 ArcGIS 韶关市香芋土壤养分空间变异特征研究.

【Objective】In this paper, the spatial variation and spatial distributions of soil nutrient in main areas of fragrant taro planting in Shaoguan were studied to provide scientific references for fragrant taro planting, reasonable fertilization and improvement of fragrant taro quality.【Method】The soil nutrient content, spatial variation and spatial distributions of fragrant taro by SPSS software, semivariance of GS + and geostatistics of GIS were studied.【Result】( i) The mean contents of organic matter( OM), available N( AN), available P( AP), available K( AK) of fragrant taro were 2. 98 %, 109. 79 mg/kg, 40. 30 mg/kg, 81. 60 mg/kg, ranging of 0. 89 %-6. 65 %, 27. 79-257. 25 mg/kg, 5. 79-108. 44 mg/kg, 15. 03-270. 18 mg/kg, and variable coefficient were 35. 2 %, 46 %, 64. 7 %, 62. 4 %. There were the differences of soil nutrient contents in different towns.( ii) The nugget coefficients of soil nutrients in towns were AK( 49. 98 %) > OM( 47. 8 %) > AN( 37. 6 %) > AP( 32. 5 %), mainly between 30 % and 50 %, all belonged to moderate spatial dependence, the spatial variabilities of the nutrients were affected by structural and random factors synchronously, structural variation was the main, and random variation was second. 【Conclusion】Overall, the AP contents of soil was abundant, the OM and AN contents were at medium level, the AK was a lack of level, and soil nutrient generally presented a trend of low in the north and high in the southern. [ABSTRACT FROM AUTHOR]