玉米秸秆全量还田下不同播种方式对土壤结构及小麦苗期生长的影响

在黄淮平原小麦玉米一年两熟、玉米收获后秸秆全量还田条件下，采用播量、播深和镇压三因素裂区试验，研究了不同播种方式对土壤容重、总孔隙度及小麦品种济麦22冬前出苗率、春季分蘖和单株次生根的影响。结果表明：播量极显著影响小麦次生根、分蘖数和出苗率，对以上指标作用力分别达到65.52%、54.02%和35.46%；镇压极显著影响出苗率，作用力达23.48%；播量、播深和镇压对土壤容重和总孔隙度的影响不显著。播深与镇压的交互效应表现为播量越大其交互作用越明显。

Effects of Different Seeding manner on the Soil Structure and Wheat seedling growth under Maize Stalk Full Returned to the Field

The studies were conducted on the effect of different seeding manner on the soil bulk density, Porosity and seedling rate before-winter, tiller in spring and Individual secondary root of the wheat cultivar “Jimai 22” under the maize-wheat double cropping system and maize stalk full returned to the fields in the Huang-Huai Plain. The results showed that sowing quantity is the main reason which significantly affected the secondary root, tiller and seedling rate. The affecting force is 65.52%,54.02% and 35.46%; Compacting has extremely effect for the seedling rate, the affecting force is 23.48%; Sowing quantity, depth and Compacting has no any extremely effect for soil bulk density and Porosity. Comparison for the effect each other of sowing depth and compacting, it shows that more sowing quantity the effect is more evidence.