【摘要】 土壤深松打破犁底层可改变土壤的理化性状 ,从而改善小麦根系的生长条件。与对照 (未深松 )相比 ,小麦的群体根系活性明显提高 ,垂直分布下移 ,使深层土壤的群体根系活性相对提高 ,进而对延缓地上部衰老和提高产量产生积极效应。更多还原

【Abstract】 Deep tillage(broke plough pan)and cultivation before winter coming(cut off some roots in shallow soil layer)could obviously affect the mass root activity of wheat and it’s spatial distribution.Deep tillage improved the physical and chemical properties of the soil,so was the root living condition.Comparison with the CK(conventional tillage),the spatial distribution of root activity intend to deepen and the root activity in deep soil layer was stronger with the soil of deep tilage,which was beneficial to delay the senescence of plant and increase grain yield.It was also found that cultivation before winter coming could improve the mass root activity in subsoil layer (below 20 cm),and its effect was the same as that of deep tillage.更多还原