Study on the changes of soil thermal conductivity of sugarcane field under different tillage methods

Abstract

The smash-ridging tillage (T) treatment and no-tillage (NT) treatment were set up in the sugarcane planting area of the Lijian Research Science Base of Guangxi Academy of Agricultural Sciences. The soil moisture content at 5, 20 and 40cm depths were obtained by location monitoring, and the soil thermal conductivity was calculated combined with some basic soil properties. The results showed that the soil thermal conductivity of T treatment at different depths were 40 cm>20 cm>5 cm. And in the site of NT treatment of that were 40 cm>5 cm>20 cm. In a few words, the thermal conductivity above 20 cm layer of soil at T treatment were basically significantly higher (P<0.05) than NT during the experiment period, but were not significant difference between T and NT treatment at the 40 cm depth. These laws were mainly due to the ability of smash-ridging tillage of storing water greater than the no-tillage pattern, which indicating the smash-ridging tillage in this study can improve soil thermal conductivity better.