Effects Of Physi-chemical Properties And Growth Of Maize For Different Planting Patterns On Black Soil

Black soil area has become an important national commodity grain production base.However,for many years because of the reuse of light,predatory management,coupled with unreasonable farming,fertilization system caused serious degradation of black soil farmland,resulting in reduced soil system productivity.According to the mechanism of soil fertility degradation,this paper studied the variation law of soil fertility under different cropping patterns and its effect on maize growth and development,and put forward the method of combining black soil Sustainable cultivation of maize.Research indicates:1.Straw mulching can also reduce the surface evaporation and surface runoff caused by water loss,to ensure 0-20 cm soil soil water content,the main crop can reduce the soil bulk density of the stable layer,while the straw mulching field is mainly applied to the topsoil,Stubble field with stubble may also be adjusted infinitely close to the ideal state of the soil as compared to three(2: 1: 1).2.The results showed that the contents of N,P and K contents and soil organic matter in 0-20 cm soil layer could be effectively improved,and the soils of 20-30 cm soil layer were also effective,This will not only be able to meet the needs of seasonal crop growth and development,but also to improve the effect of poor soil.3.Under different cropping plant height,stem diameter,net photosynthetic rate and yield are in descending order: two full further than the fields empty straw> than two empty stubble Field> large ridge of double> uniform ridge.Indicating that stubble and straw mulching can effectively promote the growth and development of maize.4.The soil water content,nitrogen,phosphorus and potassium contents and organic matter content of 0-20 cm soil layer decreased year by year,and the soil bulk density increased,which affected the growth and development of maize.The results showed that the soil water content,Corn production.The soil water content,nitrogen,phosphorus and potassium contents and organic matter content of 0-20 cm soil layer showed an increasing trend,and the soil bulk density decreased,which promoted the growth and development of maize,not only in the field of soil so that corn yield,but also played a role in improving the soil.The overall excellent performance of the two than the empty straw full field> two than the empty stubble back to the field> big ridge double line> uniform ridge.