Dynamic effects of deep ploughing combined with application of structural conditioner on moisture content of newly cultivated low hilly red soil
In order to explore the way to improve the water storage capacity of newly cultivated low hilly red soil dry land,three kinds of newly cultivated red soil dry land with different textures(sandy loam,clay loam and clay soil)were selected in central Zhejiang,and the effects of deep tillage combined with structural conditioner on soil water status were carried out.The experiment consisted of three treatments:control(shallow tillage),structural conditioner(shallow tillage +structural conditioner)and deep tillage combined with structural conditioner.The changes of water content and water storage capacity of 0-50 cm soil layer at different depths were dynamically observed.The results showed that deep ploughing combined with structural conditioner significantly reduced the bulk density of soil,and increased the number of soil water stability aggregates and water retention.The field water capacity of sand loam,clay loam and clay soil increased by 1.58%,1.94%and 4.35%,respectively,compared with that of the control.The field water capacity of sand loam,clay loam and clay soil increased by 1.35%,2.28%and 2.68%,respectively,compared with the control after deep tillage and structural conditioner.The soil water storage in the 20-50 cm soil layer in the dry season was significantly higher than that in the control.The water storage in sandy loam,clay loam and clay soil was 2.06%-12.16%,1.73%-12.41%and 5.53%-23.62%higher than that in the control,respectively.The effect of deep tillage was most obvious in clay,and is relatively weak in sandy loam soil.
red soilwater storage capacitystructural conditionerplough layerphysical characterbulk density
NETL
NSTL
万方数据
维普
