Abstract: The objective of this experiment was to study the effects of soil tillage methods on soil physical and chemical properties,summer maize growth and grain yield,and to provide a scientific basis for improving soil structure and grain yield in northern areas of Huang-Huai-Hai region.This experiment contained four tillage styles which were sub-soiling,plowing tillage,alternate year sub-soiling and rotary tillage.The results showed that sub-soiling,alternate year sub-soiling and plowing tillage could significantly reduce the soil compactness at 10 cm underground and deeper;improved the soil moisture content at different growth stages,the effect was most prominent between 20 cm to 40 cm soil layer; increased the soil potassium content's availability between 20 cm to 60 cm soil layer;helped to maintain leaf area index at middle and later filling stages and dry matter accumulation increased 7.79%-18.09%;and increased maximum and average filling rate,grain yield per hectare increased 4.1%-9.3%.Sub-soiling and alternate year sub-soiling had no significant difference between them.As far as high-yield and energy saving were concerned in the experiment,the most appropriate treatment for recommendation was the alternate year sub-soiling.

Key words: Summer maize, Tillage methods, Physicochemical characters of soil, Growth and development, Grain filling, Grain yield

CLC Number: 

• S513

• S344