| In order to explore the physical, chemical and enzyme differences of soil with different maturation degrees,
new cultivated (last five years) and ordinary dry land were studied in the lateritic red soil region of southern China, and
asymmetric T-test and principal component analysis were used. The results showed that the pH value of new cultivated dry
land was significantly lower than ordinary by 0.61 units (P=0.02); New cultivated dry land significantly decreased by
31.05%, 44.13%, 55.97%, 49.68% and 74.94% in soil organic matter, total nitrogen, total phosphorus, nitrogen and
available phosphorus contents compared to ordinary dry land; New cultivated dry land had significantly lower soil Catalase
and Urease activity than ordinary, while their invertase and phosphatase were not significantly different. Principal
component analysis showed that comprehensive difference of the physical, chemical and enzyme index was significant
between the ordinary and new cultivated dry land. Correlation analysis showed that soil enzyme activity and fertility
indicators were closely related. |
