覆盖对粘重土壤中苜蓿出苗的影响

紧实土壤降雨后常由于板结而严重影响作物出苗，导致建植不良乃至失败本实验采用遮阳膜覆盖、麦秸覆盖、不覆盖、土壤稳定剂４个表面处理和快速干燥、缓慢干燥２个干燥速度处理，研究芷蓉播后模拟降水条件一出苗情况，不同的覆盖及土壤处理条件下芷蓿出苗具有显著的处理效应，处理效应主要在出苗早期形成，遮阳膜覆盖比其他出苗显著要高；干燥速度地芷蓿出苗无影响。土壤剂和麦秸对苜蓿出苗的影响需要进一步的研究。

Effect of Mulching on Emergence of Lucerne Seedlings from Heavy Clay Soil

Crusting of heavy clay soils after rainfall often causes poor emergence of crop seedlings from soil or even failure of a crop. In this experiment the effect of mulching, using shading film and wheat straw, on the emergence of lucerne seedlings was studied under simulated rainfall and at different dryingup speeds. It was shown that shading film could significantly improve emergence, especially at its early stage, but no significant effect of dryingup speed was observed.