Abstract: This paper analyzed the soil water characteristic curve of Jinxi highland region according to the field's trial. On the basis of this, the effects of mulch tillage on soil water availability at plough layer and deep soil layer was discussed in detail. In plough layer, the total soil available water of no-tillage with (10500) kg/ha residue was the highest and that of conventional tillage was the lowest. To the deep soil layer, the available water increased with residue increasing and the difference between conventional tillage and no tillage without residue was little. The total soil available water of no-tillage with 10500 kg/ha residue was more 34.5 mm than that of conventional tillage. Both the rapid and slow available water content increased with the residue increasing. The rapid soil available water was lower than slow available water among the treatments.

Key words: Jinxi , Highland , Mulch tillage , Soil water , Availability

CLC Number: 

• S157.4