Study on Evaluation of Spatial Variability of Soil Nutrient on the Grain Crop Region of County

doi:10.7668/hbnxb.2008.S2.074

Abstract

Abstract: This paper took Huimin county for example analysis soil nutrient balance and spatialm temporal variability for more understanding spatialm temporal variability of soil nutrient on the grain crop region of county. The results showedthat,nitrogen and phosphorus in soil were superabundant,and potassium balanced from 1985. There were three types ofspatial variability of soil nutrient in Huimin county: ①The spatial variability of exchangeable Kwas best described by ex2ponential model,and the maximum correlative distance was 16. 6 km. ②The spatial variability of total N increased withincreasing spatial distance. To some extent,there was tendency of them in spatial distribution. ③The spatial variability ofOlsen2P had no relation with spatial distance inside the sampling distance. Compared with spatial distribution of soil nutri2ent in 1984,a litter differences were observed to spatial distribution of total N and exchangeable K,and a large differenceswere observed to spatial distribution of lsen. The character of spatial temporal variability of soil nutrient was similar to soil nutrient balance. It indicated soil nutrient balance was important factor to result in the difference of spatial2temporalvariability of soil nutrient.

Key words: :Nutrient balance, Spatial2temporal variability, Geostatistics, Kriging interpolation, GIS

CLC Number:

CUI Zhen-ling, CAO Ning, CHEN Xin-ping, ZHANG Fu-suo, XU Jiu-fei, SHI Li-wei, LI Jun-liang. Study on Evaluation of Spatial Variability of Soil Nutrient on the Grain Crop Region of County[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(S2): 319-324. doi: 10.7668/hbnxb.2008.S2.074.

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