Effects Of Different Fertility Managements Lifting Measures On Soil Physical And Chemical Properties In Black Soil Area

The black soil in northeastern China is an important resource for regional ecological environment security,national food security and sustainable agricultural development.The current status of the country urgently needs to supplement soil organic matter through artificial measures to ensure the level of agricultural cultivation and improve the quality of crop products.In this study,from 2016 to 2017,corn stalks and organic fertilizers were applied to the soil in the northeastern black soil to control the physicochemical characteristics of the soil and analyze the stalks by using neither straw nor organic fertilizer as a control.The effects of field addition and organic manure addition on the physical and chemical characteristics of black soil,and the best promotion mode of organic matter,provide a theoretical basis for protecting the soil quality in black soil and improving soil environment in farmland.research shows:(1)The return of straw to land significantly improves the physical properties of black soil and improves soil nutrients.With the increase of straw returning amount,the soil bulk density of 0-10cm soil layer decreased significantly,and the buffering capacity of soil permeability,moisture content,and temperature gradually increased.When straw returning amounts to 13500 kg/hm~2and 15000 kg/hm~2,the contents of soil organic matter,available phosphorus,ammonium nitrogen,nitrate nitrogen and total nitrogen have a significant increase effect on total phosphorus,total potassium,available potassium content and soil pH.The value has no significant effect.The amount of straw returning below 13500kg/hm~2 had no significant effect on soil physical and chemical properties.(2)Applying organic fertilizer has a significant effect on the physical and chemical properties of black soil.With the increase of the amount of organic fertilizer added,the bulk density of surface soil decreased significantly,the buffering capacity of soil permeability,moisture content and temperature gradually increased,and the content of soil organic matter,ammonium nitrogen,nitrate nitrogen,available phosphorus and available potassium increased significantly.When the application rate was 45000 kg/hm~2,the effect on soil physical and chemical properties was more significant than the maximum amount of straw returned(15000 kg/hm~2).When the application amount of organic fertilizer was15000 kg/hm~2,the effect on soil physical and chemical properties was not obvious.(3)The combined application of organic fertilizer and straw also improved soil physical and chemical properties.The treatment effect of YJ-3+JG-5(15000kg/hm~2straw+45000 kg/hm~2 organic fertilizer)on soil physical and chemical properties was significantly better than that of YJ-1+JG-1 treatment(9000kg/hm~2 straw+15000 kg/hm~2organic Fertilizer,but similar to the effect of maximum organic fertilizer addition treatment(45000 kg/hm~2 organic fertilizer).