Impact of tillage on maize rooting in a Cambisol and Luvisol in Switzerland

摘要: Abstract Soil conditions under no-tillage (NT) are often unfavorable for the growth of maize roots in comparison to conventional tillage (CT). In 1997 and 1999, impacts on morphology spatial distribution ( Zea mays L.) at anthesis were investigated a 5-year field trial two sites (loamy silt sandy loam soils) Swiss midlands. Four soil cores, perpendicular row, taken depth 100 cm each plot; root length density (RLD), mean diameter (MD), relative per diameter-class (LDD) determined. Roots longer thinner 1999 than 1997. The RLD was significantly higher MD smaller loamy loam. decreased with distance from plant row. Most roots, about 80% total length, layer 0 40 cm, maximum values 5 10 cm; thickest 10 50 cm. Significant differences increasing row plants found top 30 cm. Averaged over whole profile, CT NT. impact interacted factors years. Within NT 5 cm, whereas it below 10 cm. Below 50 cm, there no difference between systems. horizontal direction, consistently lower mid-row CT. Our results show that systems, which reported previous studies, persist until anthesis. accumulation near surface suggests subsurface-banding starter fertilizer is more efficient way applying (particularly immobile nutrients such as phosphorus) compared broadcasting order supply sufficient maize.