About 44 paddy soil samples from the typical red soil hilly areas of the southern China were analyzed by field sampling and laboratory analysis. Using pH, organic matter, total N, available N, available P, rapidly available K as the indicators, the fertility of paddy soil samples was evaluated and the relationship between the soil fertility and rice yield was analyzed with PI index model method. The results revealed that: 1) the paddy soils in the studied area were weakly acidic or neutral, with abundant organic matter, high N-supplying capacity and relatively low P and K levels, which is suitable for rice growing. 2) The correlation coefficient between the soil fertility and actual yield was 0.736 (significantly), which indicated that there was a positive correlation between rice yield and soil fertility.
LUO Xiao, LI Zhong-wu, YE Fang-yi, HUANG Jin-quan
. Paddy Soil Fertility Assessment in Typical Red Soil Hilly Region of Southern China Based on PI Model[J]. SCIENTIA GEOGRAPHICA SINICA, 2011
, 31(4)
: 495
-500
.
DOI: 10.13249/j.cnki.sgs.2011.04.495
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